Public replay · 0-1 · ECO B02
Zukertort Opening: Black mates in 20 moves
Alekhine Defense (B02): Player vs Chessdox Computer, casual level. Black wins with a back-rank mate after 20 moves with 15 captures and 6 checks.
Position after 20... Qe1#
Game summary
Zukertort Opening: Lemberger Gambit — how the game went
Player (White) and Chessdox Computer (Black) played this casual-level game. It opened with the Alekhine Defense, classified as ECO B02, after 1. e4 Nf6.
White castled kingside, while Black's king never castled. Over 20 moves the game saw 15 captures, 6 checks.
Black finished with 20... Qe1#, a back-rank mate against a king trapped behind its own pawns. At the end White had 6 points of material and Black 29 points, counting pawns as 1, knights and bishops as 3, rooks as 5 and queens as 9.
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[Event "Chessdox public replay"] [Site "https://chessdox.com/games/casual-replay-from-1-e4-black-wins-in-20-moves-73f19dc0fd60bf149db2"] [Date "2026.08.24"] [Round "-"] [White "Player"] [Black "Chessdox Computer"] [Result "0-1"] [TimeControl "600+0"] [ECO "A05"] [Opening "Zukertort Opening: Lemberger Gambit"] [Termination "normal"] [PlyCount "40"] 1. e4 Nf6 2. Nf3 Nc6 3. Nc3 d6 4. Nb5 Nxe4 5. Be2 a6 6. O-O axb5 7. Ne5 Nxe5 8. Bxb5+ Bd7 9. Bxd7+ Qxd7 10. b3 b5 11. b4 c6 12. Bb2 Nc4 13. Bxg7 Bxg7 14. Qh5 Nexd2 15. Qxf7+ Kxf7 16. Rae1 h5 17. Rxe7+ Qxe7 18. c3 Nxf1 19. Kxf1 Nd2+ 20. Kg1 Qe1# 0-1