CCRL 40/4 lists updated (4th June 2012)

[Graham Banks]

The 40/4 lists have been updated.
http://www.computerchess.org.uk/ccrl/404.live/ (40/4)

The 40/40 lists will be updated next weekend.

[Adam Hair]

Here is some statistical information taken from the 40/40 and 40/4 databases. It might of interest to a handful of people :

40/40 database

Code: Select all

Total number of games = 398380
White won = 143234      (36.0%)
Drawn = 148007          (37.2%)
Black won = 107139      (26.9%)
White score = 54.5%
White mated = 13085
White stalemated = 337
Black mated = 17014
Black stalemated = 364


Total number of moves = 54706725
Pawn moves = 11115829
Knight moves = 7378113
Bishop moves = 8466181
Rook moves = 12213332
Queen moves = 7031745
King moves = 9223947
Check moves = 3611556
Mate moves = 30099
Stalemate moves = 701
Hit moves = 8598231
En passant moves = 26411
Pawn two moves = 2528414
Short castlings = 658583
Long castlings = 63839
Promotion to queen = 71832
Promotion to rook = 3755
Promotion to bishop = 914
Promotion to knight = 2144


Most moves played in a game = 641  (counts Black and White)
Average number of moves played in a game = 137.32   (counts Black and White)
Maximum number of legal moves possible for a position = 84 legal moves after move 116 in game 137829
Average number of legal moves possible for a position = 28.39

40/4 database

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Total games = 871699
White won = 342632     (39.3%)
Drawn = 250484         (28.7%)
Black won = 278583     (32.0%)
White score = 53.7% 
White mated = 134116
White stalemated = 1343
Black mated = 160521
Black stalemated = 1377


Total number of moves = 124582673
Pawn moves = 25283642
Knight moves = 16108527
Bishop moves = 18487236
Rook moves = 27284783
Queen moves = 15811739
King moves = 23171057
Check moves = 9647598
Mate moves = 294637
Stalemate moves = 2720
Hit moves = 19877127
En passant moves = 57678
Pawn two moves = 5535285
Short castlings = 1413947
Long castlings = 150364
Promotion to queen = 387153
Promotion to rook = 14627
Promotion to bishop = 3698
Promotion to knight = 7673


Most moves played in game = 700 (counts White and Black)
Average number of moves played in game = 142.92 (counts White and Black)
Maximum number of legal moves possible for a position = 98 legal moves after move 152 in game 816677
Average number of legal moves possible for a position = 27.36

[Norm Pollock]

The only statistically significant difference that I notice is the percentage of drawn games.

For 40/40 it is 37.2%

For 40/4 it is 28.7%

Less time ==> More bad moves ==> Less draws

The same can be set of human rapid games compared to long time-control games.