Old Test Position

[kgburcham]

Bxh7

[d] rn1qr1k1/1p2bppp/p3p3/3pP3/P2P1B2/2RB1Q1P/1P3PP1/R5K1 w - -

[Ovyron]

Rybka 3, Human and Dynamic didn't find the move in reasonable time on my computer.

[Mike S.]

D945 3.4 GHz (P4-like dual core cpu), 256 MB hash:

Analysis by Rybka WinFinder 2.2 32-bit (single core):

1.Bxh7+
-/+ (-0.75) Depth: 1 00:00:00
=/+ (-0.34) Depth: 1 00:00:00
1.Be3 Nc6 2.Rac1 Bb4 3.R3c2 Be7 4.Qh5 g6 5.Qd1 Qb6
+/- (1.03) Depth: 4 00:00:00
+/= (0.41) Depth: 14 00:01:30 5838kN
1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.Rg3 Bf8 4.Bg5 Qc8 5.Rc1 Nc6 6.Bf6 Nxd4 7.Rxc8 Raxc8
+/= (0.44) Depth: 14 00:01:54 5838kN
+/- (0.82) Depth: 15 00:02:45 10607kN

I tried some other engines, but none would go for 1.Bxh7+ within 2 minutes, on my computer.

In analysis, engine see that Torre's 3...g6 loses quickly. After some interactive analysis with Rybka, I got this pv:

Analysis by Rybka 2.3.2a 32-bit :

1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.Rg3 Bf8 4.Bg5 Re7 5.Bf6 Nd7 6.Qh6 Nxf6 7.exf6 g6 (followed by 8.fxe7 Bxe7; see diagram)
+/- (1.22) Depth: 9 00:00:00 25kN
+/- (1.22) Depth: 19 00:01:20 7837kN

[d]r2q2k1/1p2bp2/p3p1pQ/3p4/P2P4/6RP/1P3PP1/R5K1 w - - 0 9

[Event "London"]
[Site "London"]
[Date "1984.??.??"]
[Round "?"]
[White "Polugaevsky, Lev"]
[Black "Torre, Eugenio"]
[Result "1-0"]
[ECO "D19"]
[WhiteElo "2615"]
[BlackElo "2565"]
[PlyCount "65"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O
O-O 9. Qe2 Nbd7 10. e4 Bg6 11. Bd3 Bh5 12. Bf4 Re8 13. e5 Nd5 14. Nxd5 cxd5 15.
h3 Be7 16. Rfc1 a6 17. Rc3 Bxf3 18. Qxf3 Nb8 19. Bxh7+ Kxh7 20. Qh5+ Kg8 21.
Rg3 g6 22. Rxg6+ fxg6 23. Qxg6+ Kh8 24. Qh6+ Kg8 25. Qxe6+ Kh8 26. Qh6+ Kg8 27.
Qg6+ Kh8 28. Qh5+ Kg8 29. Bh6 Bf8 30. Qg6+ Kh8 31. Bxf8 Rxf8 32. Qh6+ Kg8 33.
Ra3 1-0

[AdminX]

Analysis by 64-bit Deep Rybka 3 on a Stock Q6700 @ 2.66 GHz:

1.Rac1 Nc6 2.Be3
= (0.07) Depth: 6 00:00:00 14kN

1.a5 Nc6 2.Qg4 g6
= (0.15) Depth: 6 00:00:00 19kN

1.b3 Nc6 2.Qg4 g6 3.Be3 Qb6
= (0.16) Depth: 6 00:00:00 19kN
= (0.05) Depth: 7 00:00:00 26kN

1.a5 Nc6 2.Qg4 g6
= (0.15) Depth: 7 00:00:00 26kN

1.Be3 Nc6 2.Qg4 g6 3.Rac1 Qb6
= (0.16) Depth: 7 00:00:00 42kN
= (0.05) Depth: 9 00:00:00 85kN

1.Qd1 Nc6 2.Rac1
= (0.06) Depth: 9 00:00:00 165kN
= (0.00) Depth: 17 00:01:35 23484kN

1.Bxh7+ Kxh7 2.Qh5+[] Kg8[] 3.Rg3[] Bf8 4.Bg5[] Re7 5.Bf6[] Nd7 6.Qh6 Nxf6[] 7.exf6 g6[] 8.fxe7 Qxe7 9.Qd2 Rc8 10.Rc3 Qb4 11.Qc2 Ra8 12.Rd1 b5 13.axb5 axb5 14.Qb3 Qa5
= (0.22 !) Depth: 17 00:02:48 43245kN
+- (1.45) Depth: 17 00:04:48 66318kN



* []= Only Move

[Chris Taylor]

[quote="kgburcham"][b]Bxh7[/b]

[D] rn1qr1k1/1p2bppp/p3p3/3pP3/P2P1B2/2RB1Q1P/1P3PP1/R5K1 w - -[/quote]



Good old Rebel/Prodeo


rn1qr1k1/1p2bppp/p3p3/3pP3/P2P1B2/2RB1Q1P/1P3PP1/R5K1 w - - 0 1

Analysis by Pro Deo 1.2 Q3: AMD 3200


1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.Rg3 Bf8 4.Bg5 Re7 5.Rg4 g6 6.Bf6
+/- (0.93) Depth: 11 00:00:13 15229kN
+- (2.09) Depth: 15 00:05:00 424mN

(Taylor, 27.08.2008)

[Guetti]

Hiarcs 11.2 MP, 84 seconds:

14 +60 3336 31563387 Rd1
14 +60 3371 31880213 Rd1 Nc6 Bb1 Qa5 b3 f5
15 +47 6326 59882823 Rd1 Nc6 Be3 Qb6 Qh5 g6 Qh6 Qb4 Rcc1 Qxa4 Bc2 Qa5 b3 Nb4 Ra1 Qb6
15 +48 6425 60729703 Be3
15 +55 7419 70101814 Be3 Nc6 Rac1 Bb4 Rb3 Qb6 Qh5 g6 Qf3 Na5 Rxb4 Qxb4
15 +56 8413 79759529 Bxh7+
15 +85 8585 81608751 Bxh7+
15 +131 8767 83609562 Bxh7+ Kxh7 Qh5+ Kg8 Rg3 Bf8 Bg5 Qc8 Rc1 Nc6 Bf6 Nxd4 Rxc8 Rexc8 Rg4 Nf5 b3 Rc1+ Kh2 Rb1 a5 Rxb3
16 +119 10018 95987583 Bxh7+ Kxh7 Qh5+ Kg8 Rg3 Bf8 Bg5 Qc8 Rc1 Nc6 Bf6 Nxd4 Rxc8 Raxc8 Rd3 Rc4 b3 Rb4 Bg5 Bc5 Qd1
17 +121 14754 144000311 Bxh7+ Kxh7 Qh5+ Kg8 Rg3 Bf8 Bg5 Qc8 Rc1 Nc6 Bf6 Nxd4 Rxc8 Raxc8 Rd3 Rc4 b3 Rb4 Qd1 Nc6 Rg3 Rf4 Bg5
18 +107 23390 231700651 Bxh7+ Kxh7 Qh5+ Kg8 Rg3 Bf8 Bg5 Qc8 Rc1 Nc6 Bf6 Nxd4 Rxc8 Rexc8 Rd3 Rc1+ Kh2 Rc4 b3 Rb4 Rg3 Nf5 Rg4 d4 a5
18 +107 29811 295681941 Bxh7+ Kxh7 Qh5+ Kg8 Rg3 Bf8 Bg5 Qc8 Rc1 Nc6 Bf6 Nxd4 Rxc8 Rexc8 Rd3 Rc1+ Kh2 Rc4 b3 Rb4 Rg3 Nf5 Rg4 d4 a5