![]() ![]() That would have been a more time-consuming alternative.Ĭycle (3,5) in C8 reduces to result in R3C8 2. The alternative would have been to form the Cycle (2,3,7,8) of rest four digits in rest four cells in R1 by DSA on each. In total, as many as four out of five empty cells are eliminated to get the breakthrough by parallel scan. Next a critical breakthrough by parallel digit scan for 4 on empty cells of R1: R1C8 4 by elimination of R1C2 by 4 in C2, elimination of R1C4, R1C6 by 4 in top middle major square and elimination of R1C7 and R1C9 by 4 in C7 to leave single cell R1C8 for 4 - R1C8 4. R8C8 7 by reduction of from DS in C8 - Cycle (1,9). R8C8 7 by reduction of from DS in C8 - Cycle (1,9) lock partner on 6 in R7C6. R7C7 6 by scan for 6 in C8 - R9C6 6 by reduction of single digit lock partner on 6 in R7C6. With the major breakthrough in R2C8 8, R1C9 6 by reduction of 8 - R8C8 8 by reduction of 6. Second breakthrough is in R2C8 8 by parallel scan elimination of R2C4 and R2C5 for 8 by 8 in C4 and C5 leaving only R2C8 for 8. This gives us the first breakthrough in R6C5 8 by DSA reduction of 7 in C5 from DS in R6 - R6C1 7 by exception in C6. Solution to the NYT hard Sudoku, 3rd Match, 2021 Stage 2: Cycles, DSA technique and Parallel digit scanīreakthrough Cycle: in R6C2 joins with in R6C8 to form a Cycle of (1,9) in R6. Reduced DS in C7 further reduced by in intersecting row R8 to produce R8C7 2.īefore closing this stage we'll form two power-packed Cycles in C2.įirst notice that both row R9 and top left major square having the digits, all empty cells of C2 except R6C3 and R7C3 are eliminated for thus forming the Cycle (1,9) in C2 - Cycle (2,7,8) formed in C2 by the remaining three digits for the three cells R1C3, R3C3 and R9C3. This reduces the DS in all the empty cells in the major square and breakthrough R6C7 4 by scan for 4 in R4, C9 - R4C7 7 by scan for 7 in C9 - R4C9 3 by scan for 3 in R6 - R6C9 5 by exception in right middle major square. Now consider a double digit scan for in both C7 and C9 but not in right middle major square - forms Cycle (1,9) in R4C8, R6C8 at one stroke. This gives valid cell R3C5 6 by scan for 6 in R2, C4 and lock on 6 in C6.įollowed by a special breakthrough in R8C5 3 by parallel scan for 3 in empty cells of C5 eliminating R4C5, R5C5, R6C5 because of 3 in central middle major square and eliminating R2C5 by 3 in R2.Ī breakthrough R8C9 4 by DSA reduction of from possible digit subset of in C9. Still scanning for digit 6, a single lock on 6 is formed in R7C6, R9C6 by cross scan for 6 in R8, C4. Strategy adopted: aggressive breakthroughs by advanced Sudoku techniques.įirst valid cells by row column scan: R2C3 1 by row column scan for 1 in R1, R3 and R4C4 4 by row column scan for 4 in R5, C5, C6.įollowed by R4C2 6 by scan for 6 in R6, C1, C3 - R5C8 6 by scan in R4, R6. Step by step solution to the NYT hard Sudoku 3rd March, 2021 Stage 1: Breakthrough by Single digit lock, Parallel digit scan, Double digit scan, Cycles and DSA technique The NYT hard Sudoku 3rd March 2021īefore going through the solution solve the puzzle first. The NYT hard Sudoku 3rd March 2021 solved step by step quickly and easily, applying advanced Sudoku techniques. PRINT: You can print the puzzle in PDF format, which requires the free Acrobat Reader.How to solve NYT Hard Sudoku Maby advanced Sudoku techniques The square indicated by the hint, click "Reveal." HINT: To find out where the next solvable square is, without being told the answer, click "Hint." To remove all wrong answers at once after checking, hit the delete key.Īll numbers not yet used in the row, column, or box. ![]() Shift-delete removes all light numbers, shift-insert makes them dark.ĬHECK: To see how you're doing, click "Check." Boxes with incorrect answers will be highlighted in pink. ![]() Click "Pencil" to insert numbers in light blue, and click again to return to the standard color. ![]() PENCIL: If you're not sure about an answer, UNDO: Click to remove the last number you entered, and the one before, and the one before. TIMER: Track your time by clicking "Start." Hold the Alt key on a PC or the Control key on a Mac while typing the numbers. If you have narrowed down the possible numbers for a box, enter multiple numbers in small type. Type a number directly into a square or drag it in from the right. Fill the grid with numbers so that every row, every column and every 3-by-3 box contains the digits 1 to 9, without repeating. For information on how to play, please see below. Every day on you can solve a new sudoku puzzle that matches your level of expertise. ![]()
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