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Analyze anychess playerin seconds
Any Chess.com, Lichess or FIDE username. Their openings with win rates line by line, where they lose, when the clock runs out.Type a Chess.com, Lichess or FIDE username. You get their openings with win rates line by line, where they lose, and when they run out of time.
Trusted by GM José Cubas and other chess professionals
Three steps to know your opponent better than they know themselves
Search your rival
Enter any Lichess or Chess.com username, or search FIDE by name
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We analyze thousands of games to reveal weaknesses, psychology, and patterns
Prepare & dominate
Personalized scouting report with specific recommendations to win
Tools that change how you prepare
From a 0–100 predictability score to a Stockfish heatmap of their mistakes — sit down at the board already knowing how your opponent loses.
Stalker Score
How predictable is your opponent? One 0–100 score from four signals measured across their games.
Tilt & Psychology
The % of games they lose right after losing, how often they flag, when they resign — and their worst streak.
Twin Bot
PRO · OTBSpar before the real game: a bot built from their actual games that opens exactly like them and plays at their real ELO.
How To Beat
A pre-game checklist built from their numbers: where they lose most, when to press the clock, how to exploit their tilt.A pre-game checklist built from their numbers: the opening where they lose most, when to press the clock, how to exploit their tilt.
Deep Analysis
FIDEStockfish 18 over their classical games: accuracy by phase, clutch factor, problem pieces, and the move where their first blunder lands.Stockfish 18 over their classical games: accuracy by phase, clutch factor — how they play winning vs losing — problem pieces, and the move where their first blunder lands.
Endgame Statistics
PROEvery endgame they play, classified by type with win rates for each: where they convert, where they collapse.Every endgame they play, classified by type with win rates for each: where they convert, where they collapse — and every game one click away to replay.
Openings & Traps
Their repertoire with win rates line by line — plus 21 named traps: the ones they set and the ones they fall into.Their repertoire with win rates line by line, plus the 21 named traps they set and the ones they keep falling into.
Nemesis & Head-to-Head
PROTheir nemesis and their favorite prey, from real records against every rival.Their nemesis and their favorite prey, from real records against every rival — plus a full 1v1 comparison.
Legends Gallery
PROAnalyze 54 chess legends and their secrets.
I built Chess Stalker because I kept losing to the same three players at my club.
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The free plan has no analysis limit and runs the same engine. PRO adds the tools you can't fake.The free plan has no analysis limit and runs the same engine. PRO adds the tools you can't fake: their nemesis, their endgames, their clone over the board.
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