BDGs from the US Amateur Team Championships

Yesterday The Week in Chess had a few Blackmar-Diemers for a change. I counted five of them, all from the US Amateur Team East championships. Also, for a change, White came out well, winning four of the five. Here's the first one, from an old BDG hand. Zilbermintz,Lev (2010) - Nahum,Lawrence E US Amateur Team-ch East Parsipanny USA (1), 14.02.2009 BDG, Teichmann Defense 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4 6.h3 Bh5 7.g4 Bg6 8.Ne5 e6 9.Qf3 c6 10.g5 Nfd7

This is better than the more common Nd5, but Nh5 might be slightly better still. 11.Nxg6 hxg6 12.Bd3 Bb4 13.0-0 Qe7

13...0-0 14.h4 e5 15.h5 Nb6 16.Be3 exd4 17.hxg6 fxg6 18.Qh3 Rxf1+ 19.Rxf1 Qd7 20.Qh4 Qd6 21.Ne4 Qe7 22.Bf4 Qe8 23.a3 Bf8 24.Nd6 Bxd6 25.Bxd6 N8d7 26.Re1 Qf7 27.Re7 Qxe7 28.Bxe7 Ne5 29.Qe4 1-0 Schmidt,W (2308)-Fernandez Russo,J (2317)/ICCF email 1997 14.Ne4

14.Bf4 Bxc3? 15.bxc3 Nb6 16.Qg3 Kd7 17.Bd6! Qe8 (17...Qxd6?? 18.Rxf7+) 18.c4 Na6 19.Rab1 Kc8 20.c5 Nd5 21.Bxa6 1-0 Flude,D-Seines,H/1029 Australia-New Zealand Team Cs 1991 (21.Bxa6 bxa6 22.Qb3) 14...e5?!

14...0-0 15.h4 c5 16.c3 Ba5 17.Bf4 e5 18.dxe5 Nc6 19.Rae1 Ndxe5 20.Qg3 Rfe8 21.Bb5 Bc7 22.Nf2 Rad8 23.Ng4 f6 24.h5 Qe6 25.gxf6 gxf6 26.Bxc6 bxc6 27.Bxe5 Bxe5 28.Rxe5 fxe5 29.Nf6+ 1-0 Chargelegue,L-Duljan,F/France 1997, or (14...0-0) 15.c3 Ba5 16.Bf4 e5 17.Rae1 Bc7 18.Bg3 (18.Nd2 Nb6 19.Qg4 N8d7 20.Nf3 Nd5 21.Nxe5) 18...Na6 19.h4 Rae8 20.h5 Qe6 21.Qh1 Qd5 22.h6 f5 23.hxg7 Kxg7 24.Qh6+ Kf7 25.Qh7+ Ke6 26.Bc2 c5 27.Qxg6+ Ke7 28.Nf6 Nxf6 29.Bxe5 Ne4 30.Bxe4 fxe4 31.Qg7+ Kd8 32.Rxf8 Bxe5 33.Rxe8+ 1-0 Markus,R-Ryska,J/CIF corr 2002 15.c3 Ba5 16.Kg2

Missing (or rejecting) 16.Qxf7+ Kd8 (16...Qxf7 17.Nd6+) 17.Qb3 exd4 18.Rf7 Qe8 19.Bf4 dxc3 20.Nd6 Bb6+ 21.Kg2 cxb2 22.Rd1 b1Q 23.Rxb1 1-0 Andersson,J (2200)-B.P Pikan,B (2430)/corr 1995 16...Bc7 17.Bc4 Rf8 18.Bd2 Nb6 19.Bb3 N8d7 20.Rae1 Nd5 21.c4 N5b6 22.d5 cxd5 This was Black's last chance to seek safety with 22...0-0-0 23.cxd5 0-0-0 (Too late now)

24.a3 Or 24.Rc1 Nxd5 (24...Kb8 25.Rxc7! Nxd5 26.Rxb7+ Kxb7 27.Bxd5+ Kb8 28.Qb3+ Nb6 29.Bb4+-) 25.Bxd5 Nb6 26.Bxb7+ Kb8 27.Rfd1+- 24...Bd6 Not a chance!

A better try would have been 24...Nc5 25.Bb4 Nbd7 26.Rd1 and then 26...Bd6 where Rybka likes 27.Qxf7 Rxf7 28.Rxf7 b6 (28...Qxf7? 29.Nxd6+ Kc7 30.Nxf7 Nxb3 31.Bd6+ Kc8 32.Rd3 Ndc5 33.Rc3 Rxd6 34.Nxd6+ Kb8 35.Rf3) 29.Rxe7 Bxe7 30.Bc2+/- 25.Nxd6+ Qxd6 26.Bb4 Nc5 27.Bxc5 Qd7 [27...Qxc5 28.Rc1] 28.Bxf8 Rxf8 29.Qg4 f5 30.gxf6 Qxg4+ 31.hxg4 gxf6 32.Rxe5 Nd7 33.Re6 Nc5 34.Re3 Kd7 35.Bc2 g5 36.b4 Na6 37.Re6 Nc7 38.Rexf6 Rxf6 39.Rxf6 Nxd5 40.Rf3 Kd6 41.Be4 Nf4+ 42.Rxf4 gxf4 43.Bxb7 1-0

Here's the game in PGN for your clipping pleasure: [Event "US Amateur Team-ch East"] [Site "Parsipanny USA"] [Date "2009.02.14"] [Round "1"] [White "Zilbermintz, Lev"] [Black "Nahum, Lawrence E"] [Result "1-0"] [ECO "D00"] [WhiteElo "2010"] [Annotator "Purser,Tom"] 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bh5 7. g4 Bg6 8. Ne5 e6 9. Qf3 c6 10. g5 Nfd7 11. Nxg6 hxg6 12. Bd3 Bb4 13. O-O Qe7 (13... O-O 14. h4 e5 15. h5 Nb6 16. Be3 exd4 17. hxg6 fxg6 18. Qh3 Rxf1+ 19. Rxf1 Qd7 20. Qh4 Qd6 21. Ne4 Qe7 22. Bf4 Qe8 23. a3 Bf8 24. Nd6 Bxd6 25. Bxd6 N8d7 26. Re1 Qf7 27. Re7 Qxe7 28. Bxe7 Ne5 29. Qe4 { 1-0 Schmidt,W (2308)-Fernandez Russo,J (2317)/ICCF email 1997}) 14. Ne4 (14. Bf4 Bxc3 $2 15. bxc3 Nb6 16. Qg3 Kd7 17. Bd6 $1 Qe8 (17... Qxd6 $4 18. Rxf7+) 18. c4 Na6 19. Rab1 Kc8 20. c5 Nd5 21. Bxa6 { 1-0 Flude,D-Seines,H/1029 Australia-New Zealand Team Cs 1991} (21. Bxa6 bxa6 22. Qb3)) 14... e5 (14... O-O 15. h4 (15. c3 Ba5 16. Bf4 e5 17. Rae1 Bc7 18. Bg3 (18. Nd2 Nb6 19. Qg4 N8d7 20. Nf3 Nd5 21. Nxe5) 18... Na6 19. h4 Rae8 20. h5 Qe6 21. Qh1 Qd5 22. h6 f5 23. hxg7 Kxg7 24. Qh6+ Kf7 25. Qh7+ Ke6 26. Bc2 c5 27. Qxg6+ Ke7 28. Nf6 Nxf6 29. Bxe5 Ne4 30. Bxe4 fxe4 31. Qg7+ Kd8 32. Rxf8 Bxe5 33. Rxe8+ {1-0 Markus,R-Ryska,J/CIF corr 2002}) 15... c5 16. c3 Ba5 17. Bf4 e5 18. dxe5 Nc6 19. Rae1 Ndxe5 20. Qg3 Rfe8 21. Bb5 Bc7 22. Nf2 Rad8 23. Ng4 f6 24. h5 Qe6 25. gxf6 gxf6 26. Bxc6 bxc6 27. Bxe5 Bxe5 28. Rxe5 fxe5 29. Nf6+ {1-0 Chargelegue,L-Duljan,F/France 1997}) 15. c3 Ba5 16. Kg2 ({ Missing (or rejecting)} 16. Qxf7+ Kd8 (16... Qxf7 17. Nd6+) 17. Qb3 exd4 18. Rf7 Qe8 19. Bf4 dxc3 20. Nd6 Bb6+ 21. Kg2 cxb2 22. Rd1 b1=Q 23. Rxb1 { 1-0 Andersson,J (2200)-B.P Pikan,B (2430)/corr 1995}) 16... Bc7 17. Bc4 Rf8 18. Bd2 Nb6 19. Bb3 N8d7 20. Rae1 Nd5 21. c4 N5b6 22. d5 cxd5 ({ This was Black's last chance to seek safety with} 22... O-O-O) 23. cxd5 O-O-O { (Too late now)} 24. a3 ({Or} 24. Rc1 Nxd5 (24... Kb8 25. Rxc7 $1 Nxd5 26. Rxb7+ Kxb7 27. Bxd5+ Kb8 28. Qb3+ Nb6 29. Bb4 $18) 25. Bxd5 Nb6 26. Bxb7+ Kb8 27. Rfd1 $18) 24... Bd6 ({A better try would have been} 24... Nc5 25. Bb4 Nbd7 26. Rd1 {and then} Bd6 {where Rybka likes} 27. Qxf7 Rxf7 28. Rxf7 b6 (28... Qxf7 $2 29. Nxd6+ Kc7 30. Nxf7 Nxb3 31. Bd6+ Kc8 32. Rd3 Ndc5 33. Rc3 Rxd6 34. Nxd6+ Kb8 35. Rf3) 29. Rxe7 Bxe7 30. Bc2 $16) 25. Nxd6+ Qxd6 26. Bb4 Nc5 27. Bxc5 Qd7 (27... Qxc5 28. Rc1) 28. Bxf8 Rxf8 29. Qg4 f5 30. gxf6 Qxg4+ 31. hxg4 gxf6 32. Rxe5 Nd7 33. Re6 Nc5 34. Re3 Kd7 35. Bc2 g5 36. b4 Na6 37. Re6 Nc7 38. Rexf6 Rxf6 39. Rxf6 Nxd5 40. Rf3 Kd6 41. Be4 Nf4+ 42. Rxf4 gxf4 43. Bxb7 1-0