3.5 Identify Opening

The Identiy Opening in ChessDB (Game->Identify Opening) shows the position immediately before a game departs from a reconised opening. For example, in a game with these moves,

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Be3?? {Loses pawn on b2} 6...Qxb2 7.Nbd2 Qxc3 8.Rc1 Qa3 9.Rc2 cxd4 10.Bxd4 Nxd4 11.Nxd4 Bd7 12.Bb5 Bxb5 13.Nxb5 Qa5 14.Nc7+ Kd7 15.Nxa8 d4 16.Rc7+ Ke8 17.Qc2 Qxe5+ 18.Ne4 Be7 {Black resigns} 1-

if we used Game->Identify Opening, the following position would be shown:

white blunders at 6.Be3

Notice how this is shown up to the point where the opening departs from a reconised opening. The opening is given as:

ECO C02r [French Advance 5.Nf3 Qb6]

Clearly 6.Be3?? is a blunder and is not part of any reconside opening. The reconised openings are those in the ECO classificaitn file (chessdb.eco)

If you would like to contribute to the tutorial or see anything that should be updated, corrected or improved, please contact David Kirkby. But please note David only speaks English.

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