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Terms of use

Last updated: November 11, 2026.

The tools are free and provided “as is”. Engine evaluations are computer calculations and may differ from other programs.

Use the analysis for study, training and reviewing finished games. Do not use it during games against people on sites or in tournaments where this is forbidden; users are responsible for following those rules.

The Stockfish engine is distributed under the GNU GPL v3. Piece images are CC BY-SA 3.0.

Questions: dester1310@gmail.com.