TsumegoBench

Language models at the Go board

Read the position.
Find the vital point.

A transparent benchmark for text-only life-and-death reasoning. Compare accuracy, speed, token use, cost, and the answers behind every score.

Setting the stones…Loading benchmark results.

Verified benchmark position

Problem position

The initial position from the verified benchmark release. Coordinates match the text supplied to the model.

Spoiler: circles mark all accepted benchmark moves, not the model answer.