Mate in 1
Benchmark page
Gemini 3.5 Flash scored 61.3% strict accuracy on ChessBench, solving 92 of 150 fixed Lichess tactics when the answer had to match the expected UCI move line exactly.
Strict accuracy
61.3%
Correct puzzles
92 / 150
Prompt tokens
76,725
Total cost
$2.61
Benchmark updated
May 19, 2026, 6:48 PM
Find the tactical line that creates a fork.
Find the line that wins an undefended piece.
Solve a forced mate in one move.
Solve a forced mate in two moves.
Find the tactical line that exploits a pin.
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It also links back to the benchmark methodology and exposes model-specific copy, numbers, and sample puzzle outcomes that are relevant to searches like "Gemini 3.5 Flashchess benchmark" and "Gemini 3.5 Flashtactical reasoning results".
For the full dataset definition and scoring details, visit the ChessBench dataset and methodology page.
These examples add readable, model-specific context beyond a single leaderboard number.
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