The New Sudoku Players' Forum

by **P.O.** » Fri Apr 07, 2023 5:34 pm

Code: Select all: . 5 . . 1 . . 8 . . . . 3 . . 6 . . . . . 9 . 8 . . 3 . 2 . 4 . . . . 1 . . 5 . 3 . 2 6 . 1 . . . . 7 4 . . . 1 . 5 . . . . 9 7 . 4 . . 2 . . . 5 . . . 8 . . 2 . .5..1..8....3..6.....9.8..3.2.4....1..5.3.26.1....74...1.5....97.4..2...5...8..2. 23469 5 23679 267 1 46 79 8 247 2489 4789 12789 3 2457 45 6 14579 2457 246 467 1267 9 24567 8 157 1457 3 3689 2 36789 4 569 569 35789 3579 1 489 4789 5 18 3 19 2 6 78 1 3689 3689 268 2569 7 4 359 58 2368 1 2368 5 467 346 378 347 9 7 3689 4 16 69 2 1358 135 568 5 369 369 167 8 13469 137 2 467

by **Leren** » Fri Apr 07, 2023 9:07 pm

Code: Select all: *-------------------------------------------------------------* | 23469 5 23679 | 267 1 46 | 79 8 b247 | | 2489 4789 12789 | 3 2457 45 | 6 14579 b2457 | | 246 467 1267 | 9 24567 8 | 157 1457 3 | |---------------------+-------------------+-------------------| | 3689 2 36789 | 4 569 569 | 35789 3579 1 | | 489 4789 5 | 18 3 19 | 2 6 b78 | | 1 3689 3689 | 268 2569 7 | 4 359 b58 | |---------------------+-------------------+-------------------| | 2368 1 2368 | 5 467 346 | 378 347 9 | | 7 368-9 4 |a16 a69 2 | 1358 135 b568 | | 5 c369 c369 |c167 8 346-19 |c137 2 c467 | *-------------------------------------------------------------*

2 Pincer ALS XY Wing: (19=6) r8c45 - (6=4) r12568c9 - (4=19) r9c23479 => - 9 r8c2, -19 r9c6; stte

Leren

by **SteveG48** » Fri Apr 07, 2023 10:47 pm

Code: Select all: *-----------------------------------------------------------------------* | 23469 5 e23679 | e267 1 46 | f79 8 e247 | | 2489 4789 12789 | 3 2457 45 | 6 14579 2457 | | 246 467 1267 | 9 24567 8 | 157 1457 3 | *----------------------+------------------------+-----------------------| | 3689 2 df36789 | 4 569 569 | f35789 g3579 1 | | 489 ce4789 5 | ab18 3 19 | 2 6 bd78 | | 1 3689 3689 | 268 2569 7 | 4 g359 58 | *----------------------+------------------------+-----------------------| | 2368 1 2368 | 5 467 346 | 378 347 9 | | 7 3689 4 | 6-1 69 2 | 1358 g135 568 | | 5 369 369 | ad167 8 a13469 |bc137 2 c467 | *-----------------------------------------------------------------------*

1r59c4,r9c6 = (87)r5c49&1r9c7 - 7r5c2,r9c79 = 7r4c3&r5c9&r9c4 - 7r1c349,r5c2 = 7r5c2&(7,9)r14c7 - (7|9=351)r468c8 => -1 r8c4 ; ste

by **SteveG48** » Fri Apr 07, 2023 10:56 pm

Outstanding, Leren!

by **yzfwsf** » Fri Apr 07, 2023 11:57 pm

Almost Locked Set W-Wing: A=r9c2347-{13679}, B=r8c45-{169}, connect by 6b9 => r9c6<>1 r8c2<>9 r9c6<>9;stte

by **SteveG48** » Sat Apr 08, 2023 12:57 am

Or, very similar to Leren (but not as good):

Code: Select all: *--------------------------------------------------------------------* | 23469 5 23679 | 267 1 b46 | 79 8 c247 | | 2489 4789 12789 | 3 2457 b45 | 6 14579 c2457 | | 246 467 1267 | 9 24567 8 | 157 1457 3 | *----------------------+----------------------+----------------------| | 3689 2 36789 | 4 569 569 | 35789 3579 1 | | 489 4789 5 |b18 3 19 | 2 6 c78 | | 1 3689 3689 | 268 2569 7 | 4 359 58 | *----------------------+----------------------+----------------------| | 2368 1 2368 | 5 467 b346 | 378 347 9 | | 7 3689 4 |a16 a69 2 | 1358 135 58-6 | | 5 369 369 | 167 8 b13469 | 137 2 c467 | *--------------------------------------------------------------------*

(6=19)r8c459 - (1|9=34658)r1289c6,r5c4 - (5|8=2476)r1259c9 => -6 r8c9 ; ste

by **Cenoman** » Sat Apr 08, 2023 1:49 pm

Code: Select all: +-------------------------+------------------------+-------------------------+ | 23469 5 23679 | 267 1 46 | 79 8 247 | | 2489 4789 12789 | 3 2457 45 | 6 14579 2457 | | 246 467 1267 | 9 24567 8 | 157 1457 3 | +-------------------------+------------------------+-------------------------+ | 3689 2 36789 | 4 569 569 | 35789 3579 1 | | 489 4789 5 | 18 3 19 | 2 6 78 | | 1 3689 3689 | 268 2569 7 | 4 359 58 | +-------------------------+------------------------+-------------------------+ | 2368 1 2368 | 5 467 346 | 378 347 9 | | 7 3689 4 | d16 d69 2 | 1358 135 c568 | | 5 369 369 | 167 8 a346-19 | 137 2 b467 | +-------------------------+------------------------+-------------------------+

(4)r9c6 = (4-6)r9c9 = r8c9 - (6=19)r8c45 => -19 r9c6; ste
(ALS M-Wing)

by **P.O.** » Sun Apr 09, 2023 5:42 pm

thank you for your answers, my solution:

Code: Select all: 6r8c9 => r459c6 <> 9 r8c9=6 - r8c5{n6 n9} r8c9=6 - r8c4{n6 n1} - r5n1{c4 c6} r8c9=6 - r8c4{n6 n1} - r5c4{n1 n8} - c9n8{r5 r6} - c9n5{r6 r2} - c6n5{r2 r4} => r8c9 <> 6 ste.

Puzzle 121