Claude Opus 5.5 on Tricky grid 2
Solved: 57 of 57 blank cells right. It said it was 99% sure. All of Claude Opus 5.5's answers.
RESULTSolved
CELLS RIGHT57 / 57
SAID99% sure
MODEL TIME5.3 min
COST$0.771 (API-equivalent)
TOKENS IN / OUT904 / 38,164
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5
5 given 5 filled correctly 53 wrong, with the right digit 3 left empty
The end of its reply
<grid> 784569231 315278469 926341587 432756918 197483652 568912743 651827394 249135876 873694125 </grid> I solved this by hand, using candidate elimination plus a few trial branches that I rejected when they led to contradictions. I then checked the final grid: every row, column and 3x3 box contains 1 to 9 exactly once, and all 24 givens are in their original places. <confidence>99</confidence>
Grid tricky-1 of set v1, 24 givens. Puzzle as one line: ........13.527.4......4..8....75.....97..3..256.......6.1...3..2....5..6.7..9....