SUDOKU BENCHMARK · DEVIOUS

Qwen3.8 Flash-Next on Devious grid 4

Solved: 40 of 40 blank cells right. It said it was 100% sure. All of Qwen3.8 Flash-Next's answers.

RESULTSolved
CELLS RIGHT40 / 40
SAID100% sure
MODEL TIME8.5 min
COSTlocal, no list price
TOKENS IN / OUT383 / 11,082

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 using constraint propagation and logical deduction.

**Key steps:**
1. **Col 2** is almost full → R3C2=5, R4C2=6, R4C1=2
2. **Box 3**: R1C7=9 (only option), giving R1C5=2
3. **Box 6**: R6C9=2 (only option), leading to R6C4=8, R6C6=3, R6C1=4
4. **Box 2**: R3C5=4 (only place for 4), R2C6=9 (only place for 9)
5. **Col 5**: Only 7,8 remain → R2C5=8, R9C5=7 (after testing cases)
6. **Box 2**: R2C4=7, R3C6=6
7. Systematic elimination fills remaining cells

<grid>
783125946
642789513
951346728
265917384
318452679
497863152
524691837
176238495
839574261
</grid>
<confidence>100</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.