SUDOKU BENCHMARK · GENTLE

Qwen3.8 Flash-Next on Gentle grid 6

Solved: 52 of 52 blank cells right. It said it was 100% sure. All of Qwen3.8 Flash-Next's answers.

RESULTSolved
CELLS RIGHT52 / 52
SAID100% sure
MODEL TIME13.7 min
COSTlocal, no list price
TOKENS IN / OUT358 / 16,586

5 given 5 filled correctly 53 wrong, with the right digit 3 left empty

The end of its reply

Looking at this puzzle, I'll solve it systematically.

**Key deductions:**
- Box 2 (top-middle): Only cells left for {1,2,6,9} → R2C4=1, R2C6=6, and R1C4/R3C5 are {9,2}
- Column 8: R2C8 must be 5 (only option in row 2)
- Box 3: R3C8=4, R2C9=3, R1C7=2, R2C7=8, forcing R3C5=2 and R3C3=1
- Box 4: Only R6C1 can hold 6 → R6C1=6
- Column 5: Only R4C5 can hold 9 → R4C5=9
- Box 5: Only R5C4 can hold 8 → R5C4=8
- Column 4: Only R6C4 can hold 3 → R6C4=3, R4C4=2
- Box 5: Only R6C5 can hold 7 → R6C5=7, R7C5=5
- Column 1: Only R5C1 can hold 2 → R5C1=2
- Box 4: Only R4C2 can hold 7 → R4C2=7
- Column 7: R6C7=5, propagating through remaining cells

The solution fills in completely with all rows, columns, and boxes verified.

<grid>
534987261
927146853
861523749
173295684
245861397
698374512
719652438
486739125
352418976
</grid>
<confidence>100</confidence>

Grid gentle-5 of set v1, 29 givens. Puzzle as one line: ....87..1.2..4....86.5.37..1.....68..4..6..9..98.....2..96.2.38....3..2.3..41....