The New Sudoku Players' Forum

by **m_b_metcalf** » Wed Nov 04, 2026 9:52 pm

Code: Select all: 1 . . . 2 . 3 . . . 7 8 . . . . . 6 . 2 . 8 . . . . 9 . . 2 7 . . . 5 . 8 . . . . . 9 . . . . . . . 5 . . 1 7 . . . 1 . . . 3 . . . 5 . . . . . . 4 1 . . 9 7 . . 1...2.3...78.....6.2.8....9..27...5.8.....9.......5..17...1...3...5......41..97..

Mike

by **RSW** » Thu Nov 05, 2026 8:48 am

I needed two steps.

Step 1:

Code: Select all: +------------------+--------------------+-------------------+ | 1 e69-5 e469-5 | 469 2 467 | 3 478 af4578 | |d3459 7 8 | 1349 3459 134 | 1245 124 6 | |d3456 2 3456 | 8 34567 13467 | 145 147 9 | +------------------+--------------------+-------------------+ | 3469 1369 2 | 7 34689 13468 | 468 5 48 | | 8 1356 34567 | 12346 346 12346 | 9 23467 247 | | 3469 369 34679 | 23469 34689 5 | 2468 234678 1 | +------------------+--------------------+-------------------+ | 7 689-5 69-5 | 246 1 2468 | 24568 24689 3 | | 2369 3689 369 | 5 34678 234678 | 12468 124689 248 | |c2356 4 1 | 236 368 9 | 7 268 b28-5 | +------------------+--------------------+-------------------+

Grouped X-Loop
(5)r1c9 = r9c9 - r9c1 = r23c1 - r1c23 = (5)r1c9 => -5r1c23 -5r23c7 -5r9c9

Step 2:

Code: Select all: +-------------+------------+----------+ | 1 69 d469 | 6-4 2 7 | 3 8 5 | | 34 7 8 | 9 5 13 | 2 14 6 | | 346 2 5 | 8 46 13 | 14 7 9 | +-------------+------------+----------+ | 9 1 2 | 7 3 8 | 6 5 4 | | 8 5 c346 | 1 46 246 | 9 23 7 | |b46 36 7 |a246 9 5 | 8 23 1 | +-------------+------------+----------+ | 7 8 69 | 246 1 246 | 5 49 3 | | 2 369 369 | 5 7 46 | 14 149 8 | | 5 4 1 | 3 8 9 | 7 6 2 | +-------------+------------+----------+

2-String Kite (4)r6c4 = r6c1 - r5c3 = r1c3 => -4r1c4; ste

Thanks for the puzzle.

by **Cenoman** » Thu Nov 05, 2026 2:00 pm

Also two steps. Found no one stepper.

Code: Select all: +------------------------+---------------------------+--------------------------+ | 1 569* 4569* | 469 2 467 | 3 478 4578* | | 3459* 7 8 | 1349 3459 134 | 1245 124 6 | | 3456* 2 346+5 | 8 34567 13467 | 145 147 9 | +------------------------+---------------------------+--------------------------+ | 3469 1369 2 | 7 34689 13468 | 468 5 48 | | 8 1356 34567 | 12346 346 12346 | 9 23467 247 | | 3469 369 34679 | 23469 34689 5 | 2468 234678 1 | +------------------------+---------------------------+--------------------------+ | 7 5689 569 | 246 1 2468 | 24568 24689 3 | | 2369 3689 369 | 5 34678 234678 | 12468 124689 248 | | 2356* 4 1 | 236 368 9 | 7 268 258* | +------------------------+---------------------------+--------------------------+

Alternative to RSW's step 1:
1. 5_link grouped oddagon (5)r19, c19, b1 (*) having a single guardian => +5 r3c3; basics to the same resolution state.

Code: Select all: +--------------------+-------------------+------------------+ | 1 69 469* | 46* 2 7 | 3 8 5 | | 3-4 7 8 | 9 5 13 | 2 14 6 | | 36-4 2 5 | 8 46 13 | 14 7 9 | +--------------------+-------------------+------------------+ | 9 1 2 | 7 3 8 | 6 5 4 | | 8 5 36-4 | 1 46 246 | 9 23 7 | | 46* 36 7 | 246* 9 5 | 8 23 1 | +--------------------+-------------------+------------------+ | 7 8 69 | 246 1 246 | 5 49 3 | | 2 369 369 | 5 7 46 | 14 149 8 | | 5 4 1 | 3 8 9 | 7 6 2 | +--------------------+-------------------+------------------+

2. Skyscraper (4)r1c3 = r1c4 - r6c4 = r6c1 => -4 r23c1, r5c3; ste

ACryophyte special diamond