The New Sudoku Players' Forum

by **200e200w** » Mon Feb 19, 2018 10:09 am

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

200e200w

by **Cenoman** » Mon Feb 19, 2018 3:44 pm

In two steps:

Code: Select all: +------------------------+---------------------+---------------------+ | 7 5 6 | d289 4 3 | 28 1 c89 | | 4 9 28 | 28 7 1 | 35 6 35 | | 3 28 1 | 6 289 5 | 248 489 7 | +------------------------+---------------------+---------------------+ | 1289 278 25789 | 3 2589 4 | 6 578 c18 | | 89 6 357 | a57 1 89 | b37 2 4 | | 128 2378 4 | 2578 258 6 | 9 578 c138 | +------------------------+---------------------+---------------------+ | 6 3478 3789 | e89-5 3589 89 | 1 4789 2 | | 289 1 289 | 4 6 7 | 58 3 d589 | | 5 3478 3789 | 1 389 2 | 478 4789 6 | +------------------------+---------------------+---------------------+

(5=7)r5c4 - (7=3)r5c7 - (318=9)r146c9 - r1c4 = (9)r7c4 => -5 r7c4; 2 placements

Code: Select all: +------------------------+-------------------+---------------------+ | 7 5 6 | 289 4 3 | 28 1 89 | | 4 9 28 | 28 7 1 | 35 6 35 | | 3 28 1 | 6 89 5 | 248 489 7 | +------------------------+-------------------+---------------------+ | 1289 278 25789 | 3 289 4 | 6 578 18 | | 89 6 c357 | 57 1 89 | d37 2 4 | | 128 2378 4 | 57 28 6 | 9 578 138 | +------------------------+-------------------+---------------------+ | 6 a37-4 b37 | 89 5 89 | 1 f47 2 | | 289 1 289 | 4 6 7 | 58 3 589 | | 5 478 789 | 1 3 2 | e478 4789 6 | +------------------------+-------------------+---------------------+

(3)r7c2 = r7c3 - r5c3 = (3-7)r5c7 = r9c7 - (7 = 4)r7c8 => -4 r7c2; stte

200e200w's Nightmare #23