[r/ML] [R] Extreme Sudoku as a constraint-satisfaction benchmark, solved natively without tools or CoT or solution backtracking

Summary

Pathway introduced 'Sudoku Extreme,' a new benchmark of 250,000 very hard Sudoku puzzles designed as a pure constraint-satisfaction problem, not relying on linguistic abilities. This benchmark revealed a significant limitation in current leading LLMs (O3-mini, DeepSeek R1, Claude 3.7 8K), which all achieved 0% accuracy, indicating their struggle with non-linguistic, fundamental reasoning tasks.

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