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PHP Source Code (email masterchessgames at gmail.com for source code):
### PHP subroutine for calculating ECO codes ### Usage: $eco_id = classify(@m); ### where @m is an array of valid chess moves ### a return code of ??? is returned for any exception ### Written by: oglare@gmail.com function classify ($m){ # A00 - without 1. b3, 1. f4, 1. Nf3, 1. c4, 1. d4, 1. e4 if ($m[0] ne "b3" && $m[0] ne "f4" && $m[0] ne "Nf3" && $m[0] ne "c4" && $m[0] ne "d4" && $m[0] ne "e4") { return "A00"; } #A01 1. b3 elsif ($m[0] eq "b3") { return "A01"; } . . . .

Chess Database

Only chess games with a 1-0 or 0-1 result.
All ECO codes were re-computed for accuracy.
Contains chess games of every ECO code A00-A99, B00-B99, C00-C99, D00-D99, E00-E99.
Includes no duplicate games, 100% unique chess games only.
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