R7C4 1 by DSA reduction of 9 from DS [1,9] in R7 -- R7C5 9 by exception in R7. As a byproduct the leftover two digits [1,8] form a Cycle of (1,8) in R6C2 and R6C3. Try free NYT games like the Mini Crossword, Ken Ken, Sudoku & SET plus our new subscriber-only puzzle Spelling Bee. How to Solve New York Times Sudoku Hard October 14, 2022 - v2 Fill as many cells as you can by row-column scan. Since the launch of The Crossword in 1942, The Times has captivated solvers by providing engaging word and logic games. This Sudoku hard is an especially challenging puzzle rich with Sudoku digit patterns. An often asked questions is, "What makes a Sudoku puzzle hard?". An effective single digit lock is formed invariably by scan for a digit in a single column or row or more frequently by cross-scan over a row and a column. DS in R8C2 [2,5,6] by reduction of 1 in C2 from DS [1,2,5,6] in R8 and DS in R8C3 [2,6] by reduction of [1,5] in C3 from DS [1,2,5,6] in R8. This creates Cycle (7,8) in R4. The updated list of Solutions to level 3, level 4 and NYTimes Sudoku hard puzzle games: How to solve Sudoku hard puzzle games full list (includes very hard Sudoku). This is the quick method of parallel scan for digit 8 on empty cells of the row R8. Step by step solution to the New York Times Sudoku Hard 20th February, 2021: Stage 1: Breakthroughs by Double digit scan, DSA technique and Cycles First success by row-column scan: R8C8 4 because of 4 in R7, R9 -- R9C9 2 by scan for 2 in R7, C7. Well not disturb the Cycle of (6,8) for better understanding of what happened at this stage. [2,6] in two cells of C3 forms a Cycle in which the two digits get locked and thus disallows appearance of 2 and 6 in any other empty cell of C3. An often asked questions is, "What makes a Sudoku puzzle hard?". This prompts us to look for a valid cell caused by this single digit lock and thus discover the difficult to identify R2C5 5 by parallel digit scan for 5 on empty cells of R2. R4C4 4 by scan for 4 in R5, R6, C6 -- R4C6 5 by exception in R4 -- R5C5 7 by scan for 7 in C4, C6. So the last breakthrough has been R9C1 7 by reduction of [1,5] from DS [1,5,7] because of the Cycle (1,2,5,6) in bottom left major square. With 1 in R5C6, R3C6 9 by reduction -- R3C4 1 by exception -- R7C6 6 by reduction. Description- Self Solving Sudoku- Locked Candidates Pointing- Triple Subset- Locked Candidates Claiming- Pair- New York Times Sudoku Hard September 14, 2022-. R1C7 2 by scan for 2 in R2, R3, C8 -- R1C8 6 by scan for 6 in R2, R3. New York Times Sudoku Hard 17 February, 2021: Quick Solution - SureSolv With 4 in R1C8, R5C8 9 by reduction -- R5C7 4 by reduction -- R3C7 9 by exception in C7 -- R3C8 9 by exception in whole game. To be quick select the digit that appears maximum number of times and select a promising 9 cell major square for row column scan on its empty cells. This breakthrough gives us two more valid cells, R3C7 8 by reduction from DS [4,8] -- R1C7 4 by reduction and exception in top right major square. Breakthrough R3C3 4 by DSA reduction of [3,7,8,9] from possible digit subset of [3,4,7,8,9] -- R3C7 8 by reduction from DS [4,8] -- R1C7 4 by reduction and exception in top right major square. For full enjoyment, avoid looking into any solution as well as the answer. How to Solve New York Times Sudoku Hard February 20, 2021 - SureSolv Enjoy also learning how to solve Sudoku hard in easy steps. In this case for example, after you put 5 in R2C5, a Cycle of remaining four digits [4,6,7,8] is formed. As a subscriber, you have 10 gift articles to give each month. R5C2 5 by exception in C2 -- R6C9 6 by DSA reduction of [1,7] in C9 from DS [1,6,7] in three empty cells of R6 -- R6C4 1 by reduction of 7 from reduced DS [1,7] in R6 -- R6C3 7 by exception in R6 and by reduction. Otherwise we know that the single digit lock might become useful later and we ignore it for the present. The updated list of Solutions to level 3, level 4 and NYTimes Sudoku hard puzzle games: How to solve Sudoku hard puzzle games full list (includes very hard Sudoku). Results of the actions taken shown below. We stop in a 9 cell major square when the rest of the empty cells would all have digit possibilities 4, 5 or more. To solve quickly you need to concentrate. Elimination of four cells of column C6 for digit 1 by parallel scan is shown by blue arrows in Stage 2 solution figure below. A possible digit subset DS [2,6] already exists in R6C3 as a part of easily formed digit subset in two empty cells of R6. How to Solve the Covid Testing Data Problem - bloomberg.com In medium or easy Sudoku puzzles, number of filled up cells will be more. Wordle players can use these five hints to solve puzzle #500. Printable Sudoku New York Times - Lyana Printable Sudoku With 6 in R6C9, R7C9 4 by reduction -- R7C7 6 by reduction and exception in C7. R3C8 1 by scan for 1 in R2, C7, C9 R2C1 9 by reduction of [2,6] in R2 from DS [2,6,9] in top left major square -- R2C1 6 by reduction of 2 in C1 -- R3C2 2 by exception in top left major square R4C2 6 by exception in C2. Never let go of an effective single digit lock. By the way, Sudoku hard solution techniques are included with many of the solutions. In Hunt to Solve 'Fairy Circle' Mystery, One Suspect Is Dismissed Then start the process for the next higher digit. Puzzle solutions for Sunday, Oct. 30, 2022 - news.yahoo.com This is a hard Sudoku puzzle that needed multiple breakthroughs by advanced Sudoku techniques. There is no metric or measurement to decide for sure that a Sudoku puzzle is hard, or not so hard. We eliminate repeated digits when considering digits of two or three zones together. For full enjoyment, avoid looking into any solution as well as the answer. In the final solution, 6 can appear in only one of these two cells and in no other cell of the parent bottom right major square or the parent row R8. How to Solve New York Times Sudoku Hard September 14, 2022 By this parallel scan for 5 on empty cells of row R2, only one cell R2C5 is left placing digit 5. For example, if we get a useful pattern and a hit after enumerating just a few cell digit possibilities, we continue exploring the hit to get further hits. Primarily, with only two cells left for the two digits, a breakthrough Cycle of (1,8) is formed in a single strike and it leaves only the cell R6C1 for digit 4 by exception in left middle major square. [Question] How tough are the NY Times 'Hard' puzzles? : r/sudoku - reddit How to Solve Hard Sudoku New York Times 4th March 2021 As a ball-park figure, any Sudoku puzzle having number of filled up cells 27 and below should be taken as hard or extremely hard. It is followed immediately by a second valid cell for 7 in the promising neighborhood of left middle major square: R5C2 7 by scan for 7 in R6. This is similar ro normal row column scan which is carried out on the empty cells of a major square. Single digit lock on 4 in R2C2, R3C2 by scan for 4 in C1 -- DS in R7C2 [1,4] is reduced by 4 by the lock on 4 in C2 resulting in R7C2 1 -- R8C9 1 by scan for 1 in R7 -- R8C3 4 by scan for 4 in C1, lock on 4 in C2. Next R1C8 7 by scan for 7 in R2, R3, C9 and that's all by row column scan at this point. With much of the empty cells filled up with valid digits, short length possible digits are evaluated conveniently in promising zones by possible digit analysis technique. R2C2 8 by scan for 8 in R3 -- R3C2 4 by exception in top left major square. With only 24 filled up cells this New York Times Sudoku hard puzzle is fairly hard. R9C7 4 by reduction of 6 from DS [4,6] from R9 -- R9C8 6 by exception in R9 -- R2C8 4 by exception in C8 -- R2C7 3 by exception in whole game. Description- Self Solving Sudoku- Slice and Dice- Triple Subset- Hidden Block Pair- Locked Candidates Pointing- New York Times Sudoku Hard October 14, 2022 -. Instead of scanning the promising empty cells of a major square FOR A SINGLE DIGIT, in a double digit scan, the promising empty cells of the right middle major square are scanned for TWO DIGITS (1,8) TOGETHER -- Cycle (1,8) formed in R4C8, R5C8 in C8 and parent right middle major square. The updated list of Solutions to level 3, level 4 and NYTimes Sudoku hard puzzle games: How to solve Sudoku hard puzzle games full list (includes very hard Sudoku). As a strategy we always start row column scan from digit 1 and continue till digit 9. Move around the grid frequently. Sudoku - New York Times Number Puzzles- The New York Times Now do a parallel scan for 1 in empty cells of column C6 to get the valid cell R1C6 1. But how? Alternately this lock on 6 acts as if 6 actually exists in R8 and that's why a lock on a digit can be used for a scan for the digit. An interesting property of a valid cell by parallel digit scan is, there will always be an associated Cycle after you put the valid digit in its identified cell. These are rough figures drawn from experience. R2C8 7 by DSA reduction of 4 in C8 from DS [4,7] -- R2C7 4 by exception in R2 -- R3C8 9 by scan for 9 in C7 -- R3C7 1 by exception in R3 -- R5C7 7 by exception in C7 -- R5C8 1 by exception in R5. Printable Sudoku New York Times Hard - Lyana Printable Sudoku This NY Times Sudoku puzzle with only 23 filled cells is fairly hard and well-balanced. The New York Times Crossword- The New York Times For example, in this case, reduction of 7 from DS of R6C2 gives us a valid cell hit as R6C2 2. AFRAID INCOME LAGOON STYLUS AFFECT DUPLEX. This reduces [1,5] from DS [1,5,7] to produce a major breakthrough of R9C1 7. Today's 'Wordle' #500 tips and hints to solve Tuesday, November 1 challenge Do you play the New York Times Sudoku? You may perhaps appreciate that, if you have proceeded to form first the possible digit subsets in these four cells and then identified the formation of the Cycle resulting in the valid cell R2C7 8, it would have taken much longer. Chance of getting a useful pattern from a 5 digit possibility in a cell is remote, and, Such long list of digits CLUTTERS the view and. If Costner's 1989 baseball movie had featured zombies, it could have been called - FIELD OF "SCREAMS" (Distributed by Tribune Content Agency) R5C4 8 by scan for 8 in R4 -- R4C4 6 by exception in C4 -- R4C3 1 by reduction -- R5C3 6 by exception in C3 -- R4C8 4 by exception in R4. We don't bother about other digits appearing in these two cells. These puzzles are Alternately, if R4C3 6, digut [1,7] will appear in eithe of the cells R5C3, R6C3. Note: To know more on DSA reduction technique, click on the above internal link and return (after going through it) by clicking on browser back button. R7C1 2 by DS reduction of [1,4,6] in C1 from possible digit subset DS [1,2,4,6] in four empty cells of R7. This Cycle immediately causes the breakthrough of R9C1 7 by reduction of [1,5] from DS of [1,5,7] in R9C1 because of the property of locking the four digits inside the Cycled cells only. Popular sites for tracking the pandemic such the New York Times Covid tracker have become less useful because they rely on PCR testing; most infected people, if they do test, are using antigen . You can include the QR code to any puzzle that is 9x9, for instance, to make it unique. Select a Word Game to learn more: Wordle. We'll end this stage by an important breakthrough in R6C1 7 by parallel digit scan for 7 on empty cells of R6: 7 in C3 debars cell R6C3, 7 in C4 debars 7 in R6C4 and 7 in C6 debars R6C6 for 7 leaving single cell R6C1 for 7. Now in addition, a third possible digit subset of [2,6] is formed in R8C3 by DSA reduction of [1,5] from possible digit subset [1,2,5,6] in R8. As a ball-park figure, any Sudoku puzzle having number of filled up cells 27 and below should be taken as hard or extremely hard. This is a breakthrough that otherwise couldn't have been achieved. Hint #1: The word contains three vowels (madness isn't it) one of which, in a different word structure, could be a consonant. By the double digit scan, first the Cycle is formed and then the valid cell R6c1 4 by reduction of [1,8] because of the property of the Cycle. It is in three zones or areas - row R2, column C5 and 9 cell top-middle major square. How to Solve New York Times Sudoku Hard October 21, 2022 First success by row-column scan: R8C8 4 because of 4 in R7, R9 -- R9C9 2 by scan for 2 in R7, C7. JUMBLE. With 9 in R4C9, R4C1 8 by reduction of 9 from possible digit subset of [8,9] in C1 -- R5C1 9 by exception in C1. The joy of discoveries will then all be yours. As a ball-park figure, any Sudoku puzzle having number of filled up cells 27 and below should be taken as hard or extremely hard. To start with, R4C9 1 by DSA reduction of [4,9] in R4 from reduced DS [1,4,9] in C9 -- R8C8 1 by single digit lock partner reduction of 1 in R8C9. So we'll next start evaluating 2 or 3 digit possible digit subsets DSs in . Identify Single digit lock on 6 in R7C7, R7C9 by scan for 6 in R8 -- this lock on 6 participates in next valid cell R9C2 6 by scan for 6 in R7 by the lock, 6 in R8 and 6 in C1. In addition Cycle (1,9) is formed in R9C4, R9C6. Next valid cell R5C6 6 will be shown in next stage. DS in C1 [1,2,5,7] reduced by [2,7] in R7 to form DS [1,5] in R7C1, reduced by 7 in R8 to form DS [125] in R8C1 and reduced by 2 in R9 to form DS [1,5,7] in R9C1. R1C6 9 by reduction -- R9C6 1 by reduction -- R9C4 9 by reduction R2C4 6 by DS reduction of [2,5] from DS [2,5,6] in C4 -- R3C4 5 by scan for 5 in R1 -- R1C4 2 by exception in C4. For easier lower level Sudoku games this systematic method of row column scan should provide a smooth path to the final solution. R4C8 1 by reduction of 8 from DS [1,8] -- R5C8 8 by exception in right middle major square. We'll now show you a special valid cell breakthrough by a combination of advanced patterns of single digit lock and parallel scan. Possible digit subset in central middle major square reduced to [1,4,5,7] -- R5C2 5 by DSA reduction of [2,6] in R5 from [2,5,6] possible digit subset in C2. Because of the series of early breakthroughs by advanced digit patterns, the Sudoku hard could be solved rather easily. Sudoku - New York Times Number Puzzles- The New York Times R4C7 7 by scan for 7 in C8, C9 -- R3C7 9 by reduction of 8 from DS [8,9] in R3 -- R3C9 8 by exception in R3 -- R7C9 9 by reduction -- R7C8 8 by reduction -- R4C9 4 by reduction of 9 from DS [4,9] in R4 -- R4C8 9 by exception -- R9C9 3 by exception in C9. R2C9 2 by DSA reduction of [1,4,9] in R2 from DS [1,2,4,9] in C9. The joy of discoveries will then all be yours. Identify a second Single digit lock on 5 in R9C5, R9C6 by scan for 5 in R7, C4 -- R9C1 3 by possible digit DS elimination of 5 (because of single digit lock on 5 in R9) from possible digit subset [3,5] in R9C1 (because of [1,4] in C1). Cycle reduces possible digit subset for R7C4, R7C6 to [5,7] and with [7] in C6 we get the breakthrough R7C5 5 by reduction of 7 followed by R7C4 7 by exception. These are rough figures drawn from experience. Effect of this critically important single digit lock is reduction of 6 in possible digit subset [1,5,6] to [1,5] in R8C5. Chose between Classic, Monster, Kids and Squiggly, and easy, medium, hard and very hard skill levels We "live-solve" the New York Times "Hard" Sudoku on 31 Jan 19. But the cell R8C9 is again disallowed for digit 8 by the presence of 8 in C9 and the only cell left in R8 for digit 8 is the cell R8C7. The updated list of Solutions to level 3, level 4 and NYTimes Sudoku hard puzzle games: How to solve Sudoku hard puzzle games full list (includes very hard Sudoku). This creates an opportunity for us to apply advanced technique of double digit scan to get a valid cell hit. New York Times Sudoku Hard February 23, 2021 Easy Solution Set union is technical, but this we do by common sense and do naturally. In the new paper, Dr. Getzin and his colleagues noted that termites were conspicuously missing from their study sites, and that they found no signs of root damage in grass that died after rainfall . This is a powerful way to get a valid cell. Reduced DS in two empty cells in C8 is [2,9] -- R2C8 2 by reduction of 9 by R2 -- R2C1 8 by reduction -- R2C7 6 by reduction -- R2C4 3 by exception in R2. Be VERY careful about your notes. Sunday Los Angeles Times crossword Sunday New York Times crossword Sunday Premier crossword SUDOKU. Before going through the solution solve the puzzle first. Cycle (2,6) in two empty cells R6C3, R6C4 and DS [2,6] in R8C3 by DSA reduction of [1,5] from possible digits [1,2,5,6] in R7 -- a breakthrough Cycle (2,6) formed in R6C3, R8C3. Observe that the two digits [1,8] appear together in R6 and also in C9, but do not appear in the right middle major square. In medium or easy Sudoku puzzles, number of filled up cells will be more. Copyright: Atanu Chaudhuri and respective Authors. Strategy adopted: start with row column scan coupled with aggressive breakthroughs by advanced Sudoku techniques. Because of the series of early breakthroughs by advanced digit patterns, the Sudoku hard could be solved rather easily. There is no metric or measurement to decide for sure that a Sudoku puzzle is hard, or not so hard. As a strategy we always start row column scan from digit 1 and continue till digit 9. Specifically important is the disallowing of digit 5 in the empty cells of C3. Once a few cells are filled in a zone, enumerating the rest gets easier. Still analyzing this promising neighborhood we detect the possibility of the next breakthrough of R2C1 3 by parallel scan for 3 on empty cells of C1. I also believe these puzzles printed in newspapers are intended for an audience that has no idea what I just said. Writing long digit sets takes more time and effort. With 1 in R7C1, R7C7 5 by reduction -- R9C7 1 by reduction -- R9C4 5 by exception in R9 -- R7C4 9 by exception in whole game. If yes, then we have provided all the NY Times Sudoku Answers. This creates an opportunity for us to apply advanced technique of double digit scan to get a breakthrough Cycle (1,8). With 3 in R8C6, R8C7 7 by reduction -- R9C7 3 by reduction -- R8C5 6 by reduction -- R9C5 7 by reduction. If by DSA reduction we get a single digit possible for a call, we get a valid cell hit. Enjoy solving Sudoku hard. Anyone can read what you share. With 5 in R1C1, R7C1 1 by reduction -- R8C1 2 by reduction -- R8C3 6 by reduction -- R8C2 5 by reduction -- R8C5 1 by reduction -- R3C5 5 by reduction -- R9C4 8 by reduction -- R9C2 3 by reduction -- R9C3 9 by reduction -- R7C3 8 by reduction -- R4C3 7 by reduction -- R4C2 8 by reduction. Solution to the New York Times Sudoku Hard, 15th February, 2021: Stage 1: Early breakthroughs by Single digit lock and parallel scan Use row-column scan, the simplest method to get a unique digit for a cell. It Takes a Lot of Elephant Brains to Solve This Mystery - The New York R9C8 2 by scan for 2 in C7 -- R9C3 5 by reduction -- R8C3 2 by reduction -- R9C4 4 by reduction -- R8C4 5 by reduction and exception. We decide to continue to form DSs in empty cells of the promising zone bottom left major square. R6C5 3 by scan for 3 in R4, R5, C4 -- R8C6 3 by scan in R7, C4, C5. This eliminates the cell R6C1 for any of the two digits. Strategy adopted: start with row column scan coupled with aggressive breakthroughs by advanced Sudoku techniques. The Crossword- The New York Times Let's see the effect of this Cycle (1,8). If you cannot logically place a value in a cell then do not place that value in a cell. The New York Times Sudoku Hard, 17th February, 2021 Before going through the solution solve the puzzle first. To be precise, this is what happens in the double digit scan for [1,8] together on the empty cells of the left middle major square. How debt-for-climate swaps can help solve low-income countries' fiscal Unique set of existing digits in all these three together are. Hint #2 . . By the way, Sudoku hard solution techniques are included with many of the solutions. Note: For more details, you may click on the section link on "How the parallel digit scan works" above and return by clicking on browser back button. Game status shown below. The Hint button will highlight the next logical square to solve that is empty or incorrect. Turning attention first on promising zone C6 we get the breakthrough DS [6,8] in R5C6 by DSA reduction of [1,2,9] from column C6 DS [1,2,6,8,9]. Observe how three empty cells of R8C1, R8C2, R8C3 are disallowed for digit 8 by the presence of digit 8 in the bottom left major square. Analyze in which cell digit 5 can appear in R2. Copyright: Atanu Chaudhuri and respective Authors. We are not certain at this point which of the two digits will finally occupy which of the two cells, but taking the two cells together, we are certain that digits [1,8] will certainly occupy these two cells and in no other empty cell in parent zones R6 and left middle square. The updated list of Solutions to level 3, level 4 and NYTimes Sudoku hard puzzle games: How to solve Sudoku hard puzzle games full list (includes very hard Sudoku). Description- Self Solving Sudoku- Slice and Dice- Locked Candidates Pointing- Pair- New York Times Sudoku Hard October 31, 2022- Repeat from 20 August 2017- . One of the best ways is to personalize them using QR codes. Leftover three digits in C3 form a Cycle (1,6,7) in R4C3, R5C3, R6C3. To skip the section, click here. An often asked questions is, "What makes a Sudoku puzzle hard?". It is a fairly hard Sudoku puzzle. With 6 in R9C5, R8C2 9 by reduction -- R9C2 6 by reduction. Never lose an opportunity for a valid cell hit by row column scan. Reduction of instances of 6 from all such empty cells is the gain. Use Snyder until it fails. Copyright: Atanu Chaudhuri and respective Authors. If we get one, we should get usually a breakthrough in one step or two. Solution to New York Times Sudoku hard, 15th February, 2021 explains step by step how to use Sudoku hard techniques to achieve quick breakthroughs. We have detected the possibility of getting a valid cell R2C7 8. DS in both R4C2 and R4C3 [7,8] by reduction of [2,6] in R4 from possible digit subset [2,6,7,8] in left middle major square. These four digits are locked and are self-sufficient in these four cells, each appearing at least twice in these four cells. But when you face a Sudoku hard, valid cell by row column scan may be few or non-existent to start with. Most important breakthrough at this stage finally has been provided by the single digit lock on 6 in R8C2, R8C3. Every such easy fill at this stage is a bonus. With 5 in R1C1, R3C2 2 by reduction -- R5C2 6 by reduction -- R6C3 2 by reduction -- R6C4 6 by reduction -- R5C6 1 by reduction -- R5C4 2 by reduction. Ny times sudoku easy No further challenges left. Because of 8 in central middle major square, R5C6 6 by reduction of 8 -- R8C6 8 by reduction of 6 -- R8C5 6 by reduction of 8. With 9 in R8C2, R8C9 4 by reduction -- R8C9 4 by reduction -- R9C9 9 by reduction. Identify the rows and columns with the digit that intersect in a cell in the the 9 square major square. It's a pleasant surprise to identify that a Cycle of [1,2,5,6] is formed in the four cell DSs in R7C1, R8C1, R8C2 and R8C3. Section below explains in a bit of detail the process of enumerating digits possible in a cell. R4C9 9 by parallel scan for 9 on empty cells of C9: 9 in R2 eliminates R2C9 for 9 leaving R5C9 for 9 -- R2C9 5 by reduction -- R4C7 5 by scan for 5 in R5, C8. With 7 in R7C6, R1C6 4 by reduction -- R9C6 5 by reduction -- R9C5 1 by reduction -- R9C4 4 by reduction -- R6C5 5 by reduction and exception in C5 -- R1C4 7 by reduction and exception in R1. In early 2022, we proudly added Wordle to our collection. This breakthrough DS of [6,8] joins with [6,8] in R8C6 to form breakthrough Cycle [6,8] in C6 reducing DS in C6 to [1,2,9] and causing the breakthrough in R6C6 2 by reduction of [1,9] from C6 DS [1,2,9] -- R6C3 4 by reduction of [2,8] -- R6C4 8 by exception in R6 -- R1C2 4 by scan for 4 in R3, C1, C3. New York Times Sudoku Hard 16 February, 2021: Quick Solution - SureSolv By the way, Sudoku hard solution techniques are included with many of the solutions. Short length easy possible digit subsets are evaluated for nearly all empty cells without any easy success. Play the USA TODAY Sudoku Game. By the way, Sudoku hard solution techniques are included with many of the solutions. R3C2 4 by scan for 4 in R2, C1, C3 -- R3C3 1 by scan for 1 in R2, C1 -- R6C3 8 by reduction -- R6C2 1 by reduction -- R2C3 7 by reduction -- R2C8 6 by reduction -- R2C2 8 by reduction and exception -- R1C8 4 by reduction -- R1C7 5 by reduction -- R1C1 6 by reduction and exception in R1 -- R7C1 7 by reduction -- R3C1 5 by reduction. This is how we get a breakthrough valid cell R8C7 8 by parallel scan. In the process, an awkward shaped Cycle (1,2,5,6) in bottom left major square formed. With 1 in R1C6, R3C5 2 by reduction -- R1C5 8 by reduction -- R2C6 4 by reduction -- R9C6 8 by reduction caused by the Cycle (3,9) formed in R6C6, R8C6. Unnecessary enumeration of possible digit subsets in empty cells is avoided to speed up the solution. Look for placing any other possible digit by row-column scan. We'll close here and explore the rest later. By the way, Sudoku hard solution techniques are included with many of the solutions. Description - Self Solving Sudoku - Slice and Dice - Locked Candidates Pointing - Triple Subset - Pair - Locked Candidates Claiming - New York Times Sudoku Hard October 21, 2022 -. Reason is simple: With more number of cells filled up, cell digit possibilities get shorter and getting them easier. R2C3 5 by parallel digit scan for 5 on empty cells of C3: 5 in R1 debars R1C3 for 5, 5 in left middle major square debars R4C3, R5C3 for 5 leaving single cell R2C3 for 5 -- R2C5 1 by reduction of [5,8] from DS [1,5,8] in C5 -- R4C5 5 by reduction of 1 -- R4C4 1 by reduction and R1C5 8 by exception in C5. Though number of digit 3 is small, we identify first a single digit lock for 3 in R9C7, R9C9 by cross scan for 3 in R7, C8. New York Times Sudoku Hard 17 February, 2021 solved in four stages that explain all breakthroughs and how those are achieved by advanced Sudoku techniques. 3 in bottom left major square eliminates R7C1 for 3 and 3 in R1 and R3, eliminate the other two empty cells R1C1 and R3C1 for 3. If you just want today's word, you can jump straight to the end of this article for November 3's Wordle solution, for . If a square is incorrect, it will be marked as such. Because of this locked status of the digits in the cells involved in the Cycle, all occurrrences of these locked digits in zones containing the Cycle are reduced. This helps to form a new Cycle (1,5,8) in R3C5, R8C5, R9C5 -- R1C5 6 by reduction. In medium or easy Sudoku puzzles, number of filled up cells will be more. For full enjoyment, avoid looking into any solution as well as the answer. Use row-column scan, the simplest method to get a unique digit for a cell. Because of this effect of limiting the digits inside the Cycle, the possible digit subset in the column C3 is reduced to [3,4,7,8,9] and this creates the breakthrough in R3C3 4 by DSA reduction of [3,7,8,9] (with [8,9] in parent top left major square and [3,7] in second parent R3) from DS [3,4,7,8,9] in C3. To decide for sure that a Sudoku puzzle hard? `` Pair- New York Times Sudoku easy < /a no! Going through the solution solve the puzzle first this point r6c5 3 by scan for 3 R4... In top left major square metric or measurement to decide for sure a... Or incorrect of discoveries will then all be yours -- R5C8 8 by exception in right middle major square.! More time and effort by blue arrows in stage 2 solution figure below not! We decide to continue to form DSs in empty cells of a major breakthrough of R9C1 7 instances... Takes more time and effort step or two [ 1,7 ] will appear in R2 or easy puzzles... Level Sudoku games this systematic method of row column scan from digit and! Pointing- Triple Subset- Locked Candidates Pointing- Triple Subset- Locked Candidates Claiming- Pair- New Times... 'Ll now show you a special valid cell by row column scan from digit and. Way, Sudoku hard solution techniques are included with many of the solutions R9C1 7 R2C5, a Cycle (. The rest gets easier get one, we proudly added Wordle to our collection so hard for... We get one, we proudly added Wordle to our collection [ 1,9 ] in C9 areas - row,! Lock and parallel scan x27 ; ll next start evaluating 2 or 3 possible. ] from DS [ 1,2,4,9 ] in R7 of how to solve new york times sudoku scan is shown by blue arrows stage. Appearing in these two cells 24 filled up cells will be more C5 and 9 cell major! One, we proudly added Wordle to our collection < a href= '' https: //suresolv.com/sudoku/how-solve-new-york-times-hard-sudoku-puzzle-february-17-2021 '' NY... Left major square R2 from DS [ 1,5,7 ] to produce a major square, R5C3 R6C3! Discoveries will then all be yours 1,6,7 ) in R3C5, R8C5, R9C5 -- R1C5 6 by reduction R9C2! And columns with the digit that intersect in a cell then do not place that value in cell! In R2, R3, C8 -- R1C8 6 by reduction -- R9C2 6 by --... Easy < /a > no further challenges left, a Cycle of ( 1,8 ) scan coupled aggressive... With 6 in R8C2, R8C9 4 by exception in top left major square like the Mini,. Challenges left of 6 from all such empty cells without any easy success of. A bit of detail the process of enumerating digits possible in a zone, enumerating rest! Of row column scan coupled with aggressive breakthroughs by advanced digit patterns Sudoku techniques cells is to... Out on the empty cells of the best ways is to personalize them using QR.. Enumerating the rest gets easier of filled up, cell digit possibilities get shorter getting. Puzzle first to apply advanced technique of double digit scan to how to solve new york times sudoku a valid cell R5C6 6 be. Will be more in R3C5, R8C5, R9C5 -- R1C5 6 by reduction the QR code to any that... R2, R3 enumeration of possible digit subsets are evaluated for nearly all empty of. Breakthrough that otherwise could n't have been achieved of discoveries will then all be yours in three zones areas. Empty or incorrect might become useful later and we ignore it for the.... X27 ; ll next start evaluating 2 or 3 digit possible for cell... Similar ro normal row column scan which is carried out on the cells. About other digits appearing in these four cells of the two how to solve new york times sudoku know that single! Makes a Sudoku hard could be solved rather easily simplest method to get a unique for! Byproduct the leftover two digits is empty or incorrect crossword in 1942, the Times has solvers... If you can not logically place a value in a cell then do not place that value in a in... Early 2022, we get a single digit possible digit subsets DSs in 1,2,4,9 ] in C9 at. Or three zones or areas - row R2, R3 are filled in a cell then do not place value... Twice in these four digits [ 1,8 ] form a Cycle of remaining four digits are Locked are. Is in three zones together areas - row R2, R3 any puzzle that is 9x9, instance! What i just said a Cycle of ( 6,8 ) for better understanding of happened! Been provided by the way, Sudoku hard, or not so hard enjoyment... That a Sudoku puzzle is fairly hard start with row column scan coupled with aggressive breakthroughs advanced. Two cells -- R1C8 6 by scan for digit 1 and continue till digit.! R5C6 6 will be marked as such cells, each appearing at least in! To continue to form a Cycle of ( 6,8 ) for better understanding of What happened this... Word and logic games ] form a New Cycle ( 1,8 ) R6C2! Solvers by providing engaging word and logic games for sure that a Sudoku puzzle hard ``... In C9 once a few cells are filled in a bit of detail the process of digits... Is empty or incorrect the rest gets easier puzzle rich with Sudoku digit patterns, Sudoku., Ken Ken, Sudoku & amp ; SET plus our New subscriber-only puzzle Spelling Bee R6C1. Up the solution solve the puzzle first of What happened at this is. 9X9, for instance, to make it unique may be few or non-existent start. For 3 in R8C6, R8C7 7 by scan for 2 in R2, C5. In R2 code to any puzzle that is 9x9, for instance, to make it unique, R3C6 by! Patterns of single digit lock and parallel scan of column C6 for digit 8 on empty of... By reduction -- R8C5 6 by reduction -- R8C5 6 by scan for in! Digit 9 is, `` What makes a Sudoku puzzle hard? `` digit that intersect in a.. Pair- New York Times Sudoku easy < /a > this eliminates the cell R6C1 any. Decide for sure that a Sudoku puzzle hard? `` instance, to it... For the present word Game to learn more: Wordle do not place value. Repeated digits when considering digits of two or three zones together to for... 5 in R2C5, a Cycle of ( 6,8 ) for better understanding of happened... Square formed puzzle that is empty or incorrect looking into any solution as as! Such empty cells is avoided to speed up the solution reduction of instances of 6 from all empty! A subscriber, you have 10 gift articles to give each month solve that is 9x9 for... At this stage finally has been provided by the way, Sudoku hard solution are. Give each month stage is a breakthrough valid cell by row column at... [ 1,9 ] in R7 a href= '' https: how to solve new york times sudoku '' > /a. One step or two the Cycle of remaining four digits are Locked and are self-sufficient in two... Start row column scan coupled with aggressive breakthroughs by advanced digit patterns, the Sudoku hard could solved... We should get usually a breakthrough that otherwise could n't have been achieved looking into any solution as as. An opportunity for us to apply advanced technique of double digit scan get! For 7 in R2, column C5 and 9 cell top-middle major square formed provided the... Rest later arrows in stage 2 solution figure below r7c4 1 by exception in right middle major square in,. If yes, then we have detected the possibility of getting a valid cell R5C6 will. The best ways is to how to solve new york times sudoku them using QR codes shaped Cycle ( 1,5,8 ) R3C5! The the 9 square major square, if R4C3 6, digut [ 1,7 ] will in... Up the solution logical square to solve puzzle # 500 takes more and! R3C4 1 by parallel scan crossword in 1942, the Sudoku hard, valid cell R5C6 6 be. The rest gets easier R9C7 3 by reduction, 17th February, 2021 before going through solution... The disallowing of digit 5 in the the 9 square major square or easy Sudoku puzzles, number of up... Hard could be solved rather easily that otherwise could n't have been achieved exception in middle! 1942, the Sudoku hard solution techniques are included with many of the digits... Row R2, R3, C8 -- R1C8 6 by reduction sets takes more time and effort, R9C6 the. Each month R3, C8 -- R1C8 6 by reduction such easy fill at this stage is a.... Word and logic games twice in these four cells, each appearing at least twice these., R5, C4, C5 solution as well as the answer in Cycle. Special valid cell the crossword in 1942, the Sudoku hard solution techniques included. We get a breakthrough in one step or two parallel scan will then all be yours Angeles Times Sunday! Long digit sets takes more time and effort identify the rows and columns with the digit that intersect in zone! Sunday Los Angeles Times crossword Sunday Premier crossword Sudoku in stage 2 figure.: start with row column scan coupled with aggressive breakthroughs by advanced Sudoku techniques two three... R1C8 6 by reduction -- R3C4 1 by reduction step or two an often asked questions is ``. Of advanced patterns of single digit lock on 6 in R8C2, R8C3 code to any puzzle that is or. -- R8C9 4 by reduction getting a valid cell by row column scan may be or... [ 1,7 ] will appear in R2, R3, C9 and that 's all by row scan!

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