HALOSAR TRAP

The 'Halosar Trap' is a chess opening trap in the Blackmar-Diemer Gambit.
The trap begins with the moves
:1. d4 d5
:2. e4
This is the Blackmar-Diemer Gambit.
:2. ... dxe4
:3. Nc3 Nf6
:4. f3 exf3
Now 5.Nxf3 is usual, but by capturing with the queen, White lays a trap. (This is the Ryder Gambit.)
:5. Qxf3 Qxd4
:6. Be3 Qb4?!
Better is 6...Qg4.
Black thinks that castling is prevented because of ...Bg4, but White castles anyway.
:7. 0-0-0 Bg4?
(See diagram.)
Blundering into the trap.
:8. Nb5!!
White threatens mate with 8.Nxc7#. The Black queen can't capture the knight because 8...Qxb5 9.Bxb5+ is check.
:8. ... Na6
:9. Qxb7 Qe4
Black lost even more quickly in Diemer-Halosar, Baden-Baden 1934, after 9...Rc8 10.Qxa6 1-0.
:10. Qxa6 Qxe3+
Worse is 10...Bxd1 11.Kxd1 Rd8+ 12.Bd2 and White is winning, for example 12...Ng4 13.Nxc7+ Kd7 14.Qxa7.
:11. Kb1 Qc5
:12. Nf3
The White threat of 13.Qb7 wins the black a-pawn by force. With even material and a passed a-pawn, White will have a winning advantage (Burgess). Even stronger seems 12. Qb7! with the idea 12. ... Bxd1 13. Qxa8+ Kd7 14. Nc3 and White has a winning attack.

Contents

References

References

★ The Mammoth Book of Chess, Burgess, Graham, , , Carroll & Graf, 2000, ISBN 0-7867-0725-9