CM2-2026/01 To note Interim President’s report. CM2-2026/02 To approve Treasurer’s report CM2-2026/03 To support in principle the suggested amendments to the FIDE Charter and to submit them to the General Assembly. To submit these amendments for review by the FIDE Constitutional…
Across 305,284 analysed games it is the biggest single source of blunders for 77 of 239 players, ahead of the knight at 74, and accounts for 19.6% of the typical player's blunders.
Every game counted here contains a move that cost at least 300 centipawns, grouped by the piece that moved rather than by the move's notation. That distinction is the whole point: castling looks like the top blunder when moves are counted by name, because it is the one move with a symbol of its own, yet it is the worst piece for 0 players and 1.5% of a typical player's mistakes.
Across 305,284 analysed games from 239 players.
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