27
rules
× 17 |
3
arbiters
× 7 |
2
castling
|
0
swiss-pairing
× 2 |
16
pawn-promotion
|
3
arena
× 3 |
2
scotch-game
|
0
loopholes
|
13
checkmate
× 2 |
3
50-move-rule
× 2 |
1
software
× 2 |
0
tournament-directors
|
13
chess.com
|
3
mathematics
|
1
analysis
|
0
chess-clocks
|
13
chess-variants
|
3
endgame
|
1
programming
|
0
scoresheet
|
13
computer-chess
|
3
discovered-attack
|
1
psychology
|
0
resigning
|
8
fide
× 9 |
3
problems
|
1
linux
|
0
rapid
|
6
engines
× 4 |
3
fork
|
1
macos
|
0
houdini
|
6
puzzles
× 2 |
3
claim-draw
|
1
learning
|
0
chessbase
|
5
threefold-repetition
× 2 |
2
opening
|
1
rating
|
0
uci
|
4
websites
|
2
en-passant
|
0
tournament
× 10 |
double-beep
