The New Sudoku Players' Forum

by **m_b_metcalf** » Tue Nov 10, 2026 9:31 am

Pattern due to Pat:

Code: Select all: 1 . . . . 2 . . 3 . . 8 . 5 . . . . . 4 . 6 . . . . . . . 9 . . 5 . . 8 . 6 . . . . . 5 . 2 . . . . . 4 . . . 7 . . . 1 . 2 . . . 3 . 4 . 6 . . . . . 8 . . . . 9 1....2..3..8.5.....4.6.......9..5..8.6.....5.2.....4...7...1.2...3.4.6.....8....9

Mike

by **eleven** » Tue Nov 10, 2026 10:29 am

Mike, you posted the same puzzle again.

by **m_b_metcalf** » Tue Nov 10, 2026 10:51 am

eleven wrote:Mike, you posted the same puzzle again.

Whoops, sorry. Corrected.

by **eleven** » Tue Nov 10, 2026 7:46 pm

Code: Select all: +-------------------------+---------------------------+---------------------------+ | 1 c59 cb567 | a479 789 2 | c5789 ba46789 3 | | 3679 239 8 | 13479 5 3479 | 1279 14679 12467 | | 3579 4 257 | 6 13789 3789 | 125789 1789 1257 | +-------------------------+---------------------------+---------------------------+ | a347 13 9 | a12347 b12367 5 | 1237 b 1367 8 | | 3478 6 147 | 123479 123789 34789 | 12379 5 127 | | 2 c1358 c157 | 1379 136789 36789 | 4 13679 167 | +-------------------------+---------------------------+---------------------------+ | b5689-4 7 b46-5 | 359 b369 1 | 358 2 45 | | 589 1289-5 3 | 2579 4 79 | 6 178 157 | | ca456 c125 ca1245-6| 8 2367 367 | c1357 a1347 9 | +-------------------------+---------------------------+---------------------------+

3 finned swordfish:
4r149c148, fin r9c3 => -4r7c1
6r147c358, fin r7c1 => -6r9c3
5r169c237, fin r9c1 => -5r7c3

Code: Select all: +-------------------------+-------------------------+-------------------------+ | 1 59 b567 | 479 789 2 | 5789 a46789 3 | | 3679 239 8 | 13479 5 3479 | 1279 14679 d12467 | | 3579 4 257 | 6 13789 3789 | 125789 1789 1257 | +-------------------------+-------------------------+-------------------------+ | 347 13 9 | 12347 12367 5 | 1237 1367 8 | | 3478 6 147 | 123479 123789 34789 | 12379 5 127 | | 2 1358 157 | 1379 136789 36789 | 4 13679 167 | +-------------------------+-------------------------+-------------------------+ | 5689 7 c46 | 359 369 1 | 358 2 d45 | | 589 1289 3 | 2579 4 79 | 6 178 157 | | 456 125 1245 | 8 2367 367 | 1357 1347 9 | +-------------------------+-------------------------+-------------------------+

6r1c8 = r1c3 - (6=4)r7c3 - r7c9 = 4r2c9 => -4r1c8, -6r2c9

Code: Select all: +------------------------+--------------------------+--------------------------+ | 1 59 567 | 4 789 2 | 5789 6789 3 | | 3679 239 8 | 1379 5 379 | 1279 14679 1247 | | 379 4 257 | 6 13789 3789 | 125789 1789 1257 | +------------------------+--------------------------+--------------------------+ | 4 13 9 | 1237 6 5 | 1237 137 8 | | 378 6 17 | 12379 123789 4 | 12379 5 127 | | 2 1358 157 | 1379 13789 3789 | 4 1379 6 | +------------------------+--------------------------+--------------------------+ | 689 7 46 | a359 a39 1 | a358 2 4-5 | | 89 1289 3 | 2579 4 b79 | 6 b178 b157 | | 5 12 124 | 8 237 6 | 137 1347 9 | +------------------------+--------------------------+--------------------------+

(5=398)r7c457 - (9|8=715)r8c689 => -5r7c9, bte

by **Cenoman** » Tue Nov 10, 2026 10:02 pm

Code: Select all: +--------------------------+----------------------------+---------------------------+ | 1 59* d567* | 479 789 2 | 5789* e6789-4 3 | | 3679 239 8 | 13479 5 3479 | 1279 14679 a1247-6 | | 3579 4 257 | 6 13789 3789 | 125789 1789 1257 | +--------------------------+----------------------------+---------------------------+ | 347 13 9 | 12347 12367 5 | 1237 1367 8 | | 3478 6 147 | 123479 123789 34789 | 12379 5 127 | | 2 1358* 157* | 1379 136789 36789 | 4 13679 167 | +--------------------------+----------------------------+---------------------------+ | 45689 7 c46-5 | 359 369 1 | 358 2 b45 | | 589 1289-5 3 | 2579 4 79 | 6 178 157 | | 456# 125* 12456* | 8 2367 367 | 1357* 1347 9 | +--------------------------+----------------------------+---------------------------+

1. Finned swordfish (5)r169\c237, fr9c1 => -5 r7c3, r8c2
2. S-Wing: (4)r2c9 = r7c9 - (4=6)r7c3 - r1c3 = (6)r1c8 => -6 r2c9, -6 r1c8; 7 placements

Code: Select all: +----------------------+--------------------------+--------------------------+ | 1 59 567 | 4 789 2 | 5789 6789 3 | | 3679 239 8 | 1379 5 379 | 1279 14679 1247 | | 379 4 257 | 6 13789 3789 | 125789 1789 1257 | +----------------------+--------------------------+--------------------------+ | 4 13 9 | 1237 6 5 | 1237 137 8 | | 378 6 17 | 12379 123789 4 | 12379 5 127 | | 2 1358 157 | 1379 13789 3789 | 4 1379 6 | +----------------------+--------------------------+--------------------------+ | a689 7 b46 | 359 39 1 | 358 2 b45 | |ca89 12-89 3 | 2579 4 c79 | 6 c178 c157 | | 5 12 124 | 8 237 6 | 137 1347 9 | +----------------------+--------------------------+--------------------------+

3. ALS Y-Wing: (89=6)r78c1 - (6=45)r7c39 - (5=1789)r8c1689 => -89 r8c2; ste

Lots of Symmetry 3