Paste your games. Stockfish grades every move and
estimates your rating from how much you give away.
Load games
A multi-game PGN export from chess.com or lichess works as is.
Set B — recent (e.g. this month)
The comparison set. Delta is reported as B minus A.
Analyze
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4001125185025753300
#
Date
Opponent
Side
Result
Moves
ACPL
Blunders
Est.
A heuristic estimate, not a measurement. Accuracy improves with more games
and higher engine effort. The first four moves of each side and moves in
already-decided positions are excluded.
Set A · baseline
—
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Set B · recent
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4001125185025753300
Set ASet B
Set A
Set B
Change
Set A — per-game details
#
Date
Opponent
Side
Result
Moves
ACPL
Blunders
Est.
Set B — per-game details
#
Date
Opponent
Side
Result
Moves
ACPL
Blunders
Est.
A heuristic estimate, not a measurement. For a fair comparison, use the same
player, similar time controls, and a similar number of games in both sets.