The New Sudoku Players' Forum

by **P.O.** » Wed Sep 15, 2021 5:25 pm

Code: Select all: 4 . . . . . 7 . 1 . 1 . . 7 . . 8 . . . . . . 6 . . . 9 . . . . 4 2 . . . 5 . . . . 4 9 . . . 2 5 . 3 . . 7 8 . . 6 . . 5 . . . 3 . . 8 . . 7 . 1 . 9 . . . . . . 4.....7.1.1..7..8......6...9....42...5....49...25.3..78..6..5...3..8..7.1.9......

by **marek stefanik** » Wed Sep 15, 2021 6:47 pm

Code: Select all: .------------------.---------------------.-------------------. | 4 a69–28 3568 | 2389 235 2589 | 7 2356 1 | | 235 1 356 | 2349 7 259 |d69–3 8 234569 | | 2357 f2789 3578 | 12348–9 12345 6 |e39 2345 2345–9 | :------------------+---------------------+-------------------: | 9 78 1378 | 178 16 4 | 2 356 356 | | 37 5 1378 | 1278 126 1278 | 4 9 36 | | 6 4 2 | 5 9 3 | 8 1 7 | :------------------+---------------------+-------------------: | 8 27 47 | 6 1234 1279 | 5 234 2349 | | 25 3 456 | 249 8 259 | 1 7 2469 | | 1 b267 9 | 2347 2345 257 |c36 234–6 8 | '------------------'---------------------'-------------------'

6r1c2 = r9c2 – r9c7 = (6–9)r2c7* = r3c7 – r3c2 = 9r1c2 – Loop => –6r9c8, –3r2c7, –9r3c49, –28r1c2, –6r1c8*, –6r2c3*, stte

Marek

by **Leren** » Wed Sep 15, 2021 8:40 pm

Code: Select all: *-----------------------------------------------------------* | 4 ga69-28 3568 | 2389 235 2589 | 7 235-6 1 | | 235 1 35-6 | 2349 7 259 |d69-3 8 23456 | | 2357 f2789 3578 | 12348-9 12345 6 |e39 2345 2345 | |-------------------+--------------------+------------------| | 9 78 1378 | 178 16 4 | 2 356 356 | | 37 5 1378 | 1278 126 1278 | 4 9 36 | | 6 4 2 | 5 9 3 | 8 1 7 | |-------------------+--------------------+------------------| | 8 27 47 | 6 1234 1279 | 5 234 2349 | | 25 3 456 | 249 8 29 | 1 7 2469 | | 1 b267 9 | 2347 2345 257 |c36 234-6 8 | *-----------------------------------------------------------*

(6) r1c2 = r9c2 - r9c7 = (6-9) r2c7 = r3c7 - r3c2 = (9) r1c2 loop => - 28 r1c2, - 6 r19c8, r2c3, - 3 r2c7, - 9 r3c4; stte

Leren

Website · by **denis_berthier** » Thu Sep 16, 2021 2:36 am

.

Code: Select all: Resolution state after Singles and whips[1]: +----------------------+----------------------+----------------------+ ! 4 2689 3568 ! 2389 235 2589 ! 7 2356 1 ! ! 235 1 356 ! 2349 7 259 ! 369 8 23456 ! ! 2357 2789 3578 ! 123489 12345 6 ! 39 2345 2345 ! +----------------------+----------------------+----------------------+ ! 9 78 1378 ! 178 16 4 ! 2 356 356 ! ! 37 5 1378 ! 1278 126 1278 ! 4 9 36 ! ! 6 4 2 ! 5 9 3 ! 8 1 7 ! +----------------------+----------------------+----------------------+ ! 8 27 47 ! 6 1234 1279 ! 5 234 2349 ! ! 25 3 456 ! 249 8 29 ! 1 7 2469 ! ! 1 267 9 ! 2347 2345 257 ! 36 2346 8 ! +----------------------+----------------------+----------------------+

whip[5]: r8n6{c9 c3} - c2n6{r9 r1} - r2n6{c3 c7} - c7n9{r2 r3} - c2n9{r3 .} ==> r5c9≠6
stte

by **P.O.** » Thu Sep 16, 2021 6:03 pm

Code: Select all: after singles and intersections: 4 a2-689 3568 2389 235 2589 7 235×6 1 235 1 35×6 2349 7 259 d3+69 8 23456 2357 2789 3578 123489 12345 6 39 2345 2345 9 78 1378 178 16 4 2 356 356 37 5 1378 1278 126 1278 4 9 36 6 4 2 5 9 3 8 1 7 8 27 47 6 1234 1279 5 234 2349 25 3 456 249 8 29 1 7 2469 1 b2+67 9 2347 2345 257 c3-6 2346 8 depth: 1 candidate: 6 from cells (((1 8 3) (2 3 5 6)) ((2 3 1) (3 5 6))) ((6 0) (1 2 1) (2 6 8 9)) ((6 0) (9 2 7) (2 6 7)) ((6 1 1) (2 7 3) (3 6 9)) 4 d2-68+9 3568 2389 235 2589 7 235 1 235 1 35 2349 7 259 369 8 23456 2357 c278-9 3578 123489 12345 6 b-3+9 2345 2345 9 78 1378 178 16 4 2 356 356 37 5 1378 1278 126 1278 4 9 36 6 4 2 5 9 3 8 1 7 8 27 47 6 1234 1279 5 234 2349 25 3 456 249 8 29 1 7 2469 1 e2+67 9 2347 2345 257 a+3-6 234×6 8 depth: 3 candidate: 6 from cell (((9 8 9) (2 3 4 6))) ((6 0) (9 7 9) (3 6)) ((3 0) (9 7 9) (3 6)) ((9 1 9) (3 7 3) (3 9)) ((9 2 1) (1 2 1) (2 6 8 9)) ((6 3 10) (9 2 7) (2 6 7)) ste.

Puzzle 3