The New Sudoku Players' Forum

by **200e200w** » Thu Feb 22, 2018 11:07 am

Code: Select all: . . .|4 . .|2 . . . 2 7|. . .|. . 3 1 . .|7 3 .|. . 9 -----+-----+----- 2 . .|. . 3|5 . 4 . . .|8 . 6|. . . 3 . 6|2 . .|. . 1 -----+-----+----- 6 . .|. 5 4|. . 8 5 . .|. . .|1 4 . . . 9|. . 8|. . .

200e200w

by **Cenoman** » Thu Feb 22, 2018 10:27 pm

Two steps:

Code: Select all: +----------------------+--------------------+----------------------+ | 89 3569 35 | 4 68 1 | 2 57 567 | | 48 2 7 | 5 68 9 | 46 1 3 | | 1 456 45 | 7 3 2 | 468 58 9 | +----------------------+--------------------+----------------------+ | 2 1789 18 | 19 179 3 | 5 6 4 | | 479 14579 145 | 8 1479 6 | 379 2379 27 | | 3 479 6 | 2 479 5 | 789 789 1 | +----------------------+--------------------+----------------------+ | 6 137 a23-1 | d13 5 4 | 379 2379 8 | | 5 38 b238 | c369 c29 7 | 1 4 c26 | | 47 1347 9 | 136 12 8 | 367 2357 2567 | +----------------------+--------------------+----------------------+

(2)r7c3 = r8c3 - (269=3)r8c4 - (3=1)r7c4 => -1 r7c3

Code: Select all: +---------------------+--------------------+----------------------+ | 89 3569 e35 | 4 68 1 | 2 d57 d567 | | 48 2 7 | 5 68 9 | 46 1 3 | | 1 456 45 | 7 3 2 | 468 58 9 | +---------------------+--------------------+----------------------+ | 2 789 f18 | g19 179 3 | 5 6 4 | | 479 4579 145 | 8 1479 6 | 379 2379 27 | | 3 479 6 | 2 479 5 | 789 789 1 | +---------------------+--------------------+----------------------+ | 6 17 e23 | 13 5 4 | 379 2379 8 | | 5 a38 ae38-2 | b36-9 29 7 | 1 4 c26 | | 47 147 9 | 136 12 8 | 367 2357 2567 | +---------------------+--------------------+----------------------+

(38)r8c23 = (3-6^)r8c4 = r8c9 - (67=5)r1c89 - (5=238*)r178c3 - (8=1)r4c3 - (1=9^)r4c4 => -2 r8c3(*), -9 r8c4(^); stte

200e200w's Nightmare #26