Claude Opus 5.5 on Tricky grid 3
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 TIME2.9 min
COST$0.401 (API-equivalent)
TOKENS IN / OUT907 / 19,667
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5 given 5 filled correctly 53 wrong, with the right digit 3 left empty
The end of its reply
<grid> 847936512 925741638 631852749 316498275 589327461 472165983 753689124 268514397 194273856 </grid> <confidence>99</confidence> I solved this by hand, testing cases where needed. I then checked that every row, column and 3x3 box contains 1–9 exactly once and that all 24 givens are unchanged.
Grid tricky-2 of set v1, 24 givens. Puzzle as one line: .4...65..9....1..8..1..2.4....4.8....893...........9..75.6...24.68.........2...5.