Chess.com Features

• Games played
• Average accuracy
• Accuracy by move number
• Results by opponent rating
• Games won/drew/lost by ..
• Games by game shape
• Results by game shape
• Accuracy by game shape
• Game Phases
• Forks
• Pins
• Mates
• Hanging Pieces
• Free Pieces
• Pieces
• Accuracy per piece
• Average accuracy per piece
• Castling
• Time of Day
• Day of Week
• Geography

Extra Features

• Accuracy per square

• Accuracy per square per piece

• Opening win/loss stats

• Average accuracy by opening

• Average move frequency by piece

• Castling statistics on same side or opposite sides when playing white/black

• Chart containing the opening repertoire breakdown

• Most common endgame types (e.g., rook vs. pawn, queen vs. rook, etc.)

• Percentage of games won/lost/drawn based on endgame type

• Check at what move number you make your first mistake or inaccurate move in the game

• Most common types of tactical motifs (e.g., pins, forks, discovered attacks, etc.) inflicted and sustained

• Average centipawn loss (CPL) per move (a measure of how far off the optimal move a player's move was)

• Average number of pawn moves per game

• Average number of minor/major piece moves per game

• Average number of queen moves per game

• Average number of king moves per game

• Average piece mobility (how many squares it traveled (manhattan distance)) by piece type (pawn, knight, bishop, rook, queen)

• Total number of en passant captures made by the player

• Total number of good en passant captures made by the player

• Total number of bad en passant captures made by the player

• Total number of en passant captures missed by the player

• En passant capture success rate (percentage of en passant captures made out of total opportunities to make an en passant capture)

• En passant capture failure rate (percentage of missed en passant captures out of total opportunities to make an en passant capture)

• En passant capture frequency (average number of en passant captures made per game)

• En passant capture frequency by opening (percentage of games with an en passant capture, broken down by opening played)

• En passant capture success rate by opening (percentage of successful en passant captures out of total opportunities, broken down by opening played)

• En passant capture success rate by game phase (percentage of successful en passant captures out of total opportunities, broken down by opening, middle game, endgame, etc.)

• Average check accuracy (not counting checkmate obviously)

• Average material balance (determinable)

• Compulsory captures caused and suffered total and rates per game

• Move frequency diff between light and dark bishops

• Draw by agreement accuracy

• Queen trade accuracy (?)

• Best matches (accuracy sum)

General things to do

• Add 960 support and filters
• UT/Coverage/CI
• Cache pgn/game mapping
• Download 3-4-5 tables automatically