Observed arrival · 2026-09-09
ChessShadow Plays Against a Statistical Version of Your Opponent
Enter a chess.com username and play against a Stockfish-powered shadow built from that player's opening choices and measured blitz-game blunder rate.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
Field notes
The page offers 6-, 12-, and 24-month windows for collecting a chess.com player's public blitz games, then displays learned opening positions and a measured blunder rate before starting the match. It combines those signals with Stockfish and exposes a 0–20 Skill Level control, while explicitly warning that this is not a verified Elo scale. A fallback built-in engine is available when Stockfish fails to load.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue