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Subject: A hart test position (tactical)

Author: Eduard Nemeth

Date: 04:32:58 04/11/02


This game I find in the NEW of TWIC (number 387):


[Event "TCh-NOR Qualifier "]
[Site "?"]
[Date "2002.??.??"]
[Round "3"]
[White "Robertsen,Thomas"]
[Black "Nikolaisen,Magnar"]
[ECO "B86"]
[Result "1-0"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4
e6 7. Bb3 Be7 8. O-O O-O 9. Qf3 Qc7 10. Qg3 Nh5 11. Qh3 Nf6
12. Qg3 Nh5 13. Qf3 Nf6 14. g4 Nbd7 15. g5 Ne5 16. Qh3 Nfd7
17. f4 Qc5 18. Be3 Nc4 19. Bf2 Qc7 20. Nf5 Ndb6 21. Nxg7
Kxg7 22. Kh1 f6 23. Qh6+ Kf7 24. Qh5+ Kg8 25. g6 hxg6
26. Qxg6+ Kh8 27. Qh6+ Kg8 28. Rg1+ Kf7 29. Qg6# 1-0

White plays 21 the strongest move 21. Nxg7!!

[D]r1b2rk1/1pq1bppp/pn1pp3/5NP1/2n1PP2/1BN4Q/PPP2B1P/R4RK1 w - -

Forced Variation:


1. Nxg7! Kxg7 2. Qh6+! Kg8 (Kh8? and now 3. Bd4! ++-) und now
3. Kh1 !!

After this forced moves all programs says that the position is clearly better
for white!

Here a Analysis by Fritz 7 after 3. Kh1!

[D]r1b2rk1/1pq1bp1p/pn1pp2Q/6P1/2n1PP2/1BN5/PPP2B1P/R4R1K b - - 0 1

Analysis by Fritz 7:
3...d5 4.f5 f6 5.gxf6 Lxf6 6.Tg1+ Lg7 7.Txg7+ Dxg7 8.Tg1 Dxg1+ 9.Kxg1
+- (1.53) Tiefe: 9/35 00:00:52 14801kN
3...Sd7!
+- (1.50) Tiefe: 9/35 00:00:53 15262kN
3...Sd7!
± (1.34) Tiefe: 9/35 00:00:54 15318kN
3...Sd7!
± (1.03) Tiefe: 9/35 00:00:54 15361kN
3...Sd7!
² (0.41) Tiefe: 9/35 00:00:54 15467kN
3...Sd7 4.f5 Te8 5.g6 hxg6 6.fxg6 Sf6 7.gxf7+ Kxf7 8.Lh4
= (0.06) Tiefe: 9/35 00:00:56 16117kN
3...Sd7--
² (0.34) Tiefe: 10/30 00:01:03 17927kN
3...Sd7 4.f5 exf5 5.Sd5 Dd8 6.exf5 b5 7.Lxc4 Lxg5 8.Tg1 bxc4 9.Txg5+ Kh8
± (1.28) Tiefe: 10/33 00:01:09 19552kN
3...Te8!
± (1.25) Tiefe: 10/33 00:01:12 20471kN
3...Te8 4.Ld4 Lf8 5.Df6 e5 6.Lxb6 Sxb6 7.g6 d5 8.gxf7+ Dxf7 9.Dxb6
± (1.12) Tiefe: 10/33 00:01:13 20951kN
3...Td8!
± (1.09) Tiefe: 10/35 00:01:30 25957kN
3...Td8 4.Ld4 Lf8 5.Df6 e5 6.Lxb6 Sxb6 7.Lxf7+ Dxf7 8.Dxd8 Sc4 9.Sd5 exf4
10.Txf4
± (1.09) Tiefe: 11/33 00:01:57 33850kN
3...Td8 4.Ld4 Lf8 5.Df6 e5 6.Lxb6 Sxb6 7.Lxf7+ Dxf7 8.Dxd8 Sc4 9.fxe5 De7
10.Dxe7 Lxe7
± (1.19) Tiefe: 12/33 00:03:12 56084kN
3...Td8 4.Ld4 Lf8 5.Df6 e5 6.Lxb6 Sxb6 7.Lxf7+ Dxf7 8.Dxd8 Sc4 9.fxe5 De7
10.Dxe7
± (1.19) Tiefe: 13/38 00:06:47 120048kN
3...Td8 4.Ld4 Lf8 5.Df6 e5 6.Lxb6 Sxb6 7.Lxf7+ Dxf7 8.Dxd8 Sc4 9.Sd5 Sd2
± (1.00) Tiefe: 14/40 00:14:30 258607kN
(Nemeth, Stuttgart 11.04.2002)

My question now: which programm can find the strong tactical move 21. Nxg7 ?

Eduard






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