Claude Sonnet 5.5 on Devious grid 4
Changed a given digit: 37 of 40 blank cells right, 1 given digits changed. It said it was 96% sure. All of Claude Sonnet 5.5's answers.
RESULTChanged a given digit
CELLS RIGHT37 / 40
SAID96% sure
MODEL TIME1.0 min
COST$0.084 (API-equivalent)
TOKENS IN / OUT918 / 8,022
7
8
3
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9
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19
5
91
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9
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9
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8
36
63
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5
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9
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1
5 given 5 filled correctly 53 wrong, with the right digit 3 left empty
The end of its reply
I solved it by working out forced cells row by row, then splitting on where the 5s fall in rows 7 and 8. One branch (5 at row 8 column 1) forced a conflict between box 2 and box 7, so the other branch had to hold. That branch filled every remaining cell, and I checked all rows, columns and boxes against the final grid. <grid> 783125946 642781593 951346728 265917384 318452679 497836152 524691837 176238495 839574261 </grid> <confidence>96</confidence>
Grid devious-3 of set v1, 41 givens. Puzzle as one line: 7831.5.46.4....5..9..3...2...591738431.4.26...97.6.15..2..918...7..3.....395.426.