Author: Mike Hood
Date: 16:49:03 12/18/03
Go up one level in this thread
On December 18, 2003 at 19:27:10, Mike Hood wrote:
>On December 17, 2003 at 22:57:40, Mike Byrne wrote:
>
>>This game was voted 4th best of Chess Informant # 7.
>>
>>[Event "URS-ch36"]
>>[Site "Alma-Ata"]
>>[Date "1968.??.??"]
>>[Round "12"]
>>[White "Tal, Mihail"]
>>[Black "Gurgenidze, Bukhuti"]
>>[Result "1-0"]
>>[ECO "B15"]
>>[PlyCount "67"]
>>[EventDate "1968.12.30"]
>>[Source "ChessBase"]
>>
>>1. e4 c6 2. d4 d5 3. Nc3 b5 4. a3 dxe4 5. Nxe4 Bf5 6. Bd3 Bxe4 7. Bxe4 Nf6 8.
>>Bd3 e6 9. Nf3 Be7 10. Qe2 Nbd7 11. O-O O-O 12. Re1 Re8 13. Ne5 Nxe5 14. dxe5
>>Nd5 15. Qg4 a5 16. h4 Bxh4 17. g3 Be7 18. Kg2 g6 19. Rh1 Bf8 20. Bg5 Qc7{
>>
>>[d]r3rbk1/2q2p1p/2p1p1p1/pp1nP1B1/6Q1/P2B2P1/1PP2PK1/R6R w - - 0 1
>
>Whoosh! It only takes Fritz 5.32 9 seconds to find Rxh7 on my Pentium III-733.
>Whatever developments there might be, I still keep returning to F5.32 for
>tactical problems. I'm curious to see what would happen if Chessbase added egtb
>probing to the code without changing anything else.
>
>Analysis by Fritz 5.32:
>
>1.Rxh7--
> -+ (-3.87) Depth: 1/2 00:00:00
>1.Rxh7
> -+ (-3.87) Depth: 1/2 00:00:00
>1.Bxg6!
> -+ (-2.87) Depth: 1/2 00:00:00
>1.Rad1!
> µ (-1.25) Depth: 1/2 00:00:00
>1.Bf6!
> µ (-0.72) Depth: 1/3 00:00:00
>1.a4!
> ³ (-0.69) Depth: 1/8 00:00:00
>1.Rae1!
> ³ (-0.41) Depth: 1/8 00:00:00
>1.Rae1 Bg7
> ³ (-0.59) Depth: 2/5 00:00:00
>1.Qh4!
> ³ (-0.56) Depth: 2/6 00:00:00
>1.Qh4 h6 2.Bxh6 Bxh6 3.Qxh6 Qxe5
> ³ (-0.47) Depth: 2/8 00:00:00
>1.Qh4 h6 2.Bxh6 Bxh6 3.Qxh6 Qxe5
> ³ (-0.47) Depth: 3/10 00:00:00
>1.Qh4 h5 2.Bf6 Bc5
> ³ (-0.47) Depth: 4/15 00:00:00 2kN
>1.Qh4 h5 2.Bf6 Nxf6 3.Qxf6 Rad8
> ³ (-0.53) Depth: 5/11 00:00:00 10kN
>1.Qh4 h5 2.a4 bxa4 3.c4 Nb4
> µ (-0.72) Depth: 6/19 00:00:00 38kN
>1.Qh4 h5 2.Rae1 Bg7 3.Bf6 Bxf6 4.exf6 Rad8
> µ (-0.75) Depth: 7/21 00:00:00 202kN
>1.Qe4!
> µ (-0.72) Depth: 7/21 00:00:01 313kN
>1.Qe4 Bg7 2.Rae1 h5 3.c3 a4 4.c4
> µ (-0.78) Depth: 8/25 00:00:01 592kN
>1.Qe2!
> µ (-0.75) Depth: 8/29 00:00:03 1706kN
>1.Qe2 Bg7 2.Rae1 b4 3.f4 bxa3 4.bxa3 Rab8 5.Rd1 Nc3
> µ (-0.75) Depth: 9/27 00:00:06 3356kN
>1.Rxh7!
> µ (-0.72) Depth: 9/30 00:00:09 5189kN
>1.Rxh7 Bg7 2.Rah1 Qxe5 3.c3 b4 4.cxb4 axb4 5.axb4 Reb8
> = (0.13) Depth: 9/32 00:00:13 7970kN
>1.Rxh7!
> ² (0.44) Depth: 10/29 00:00:18 11650kN
>1.Rxh7 Bg7 2.Bf6 Nxf6 3.exf6 Bxf6 4.Bxg6 Bg7 5.Bd3 Qe5
> ² (0.63) Depth: 10/32 00:00:21 13550kN
>1.Rxh7 Bg7 2.Bf6 Nxf6 3.exf6 Bxf6 4.Bxg6 Bg7 5.Bd3 Qe5
> ² (0.38) Depth: 11/38 00:00:34 22592kN
>1.Rxh7!
> ² (0.69) Depth: 12/36 00:01:06 45584kN
The above analysis is with Fritz 5.32's default settings. By changing the
selectivity parameter to 3, Rxh7 is found in 7 seconds. By changing the
selectivity parameter to 4, Rxh7 is found in 5 seconds!
Analysis by Fritz 5.32:
1.Rxh7--
-+ (-3.87) Depth: 1/2 00:00:00
1.Rxh7
-+ (-3.87) Depth: 1/2 00:00:00
1.Bxg6!
-+ (-2.87) Depth: 1/2 00:00:00
1.Rad1!
µ (-1.25) Depth: 1/2 00:00:00
1.Bf6!
µ (-0.72) Depth: 1/3 00:00:00
1.a4!
³ (-0.69) Depth: 1/8 00:00:00
1.Rae1!
³ (-0.41) Depth: 1/8 00:00:00
1.Rae1 Bg7
³ (-0.59) Depth: 2/5 00:00:00
1.Qh4!
³ (-0.56) Depth: 2/6 00:00:00
1.Qh4 h6 2.Bxh6 Bxh6 3.Qxh6 Qxe5
³ (-0.47) Depth: 2/8 00:00:00
1.Qh4 h6 2.Bxh6 Bxh6 3.Qxh6 Qxe5
³ (-0.47) Depth: 3/10 00:00:00
1.Qh4 h5 2.Bf6 Bc5
³ (-0.47) Depth: 4/15 00:00:00 2kN
1.Qh4 h5 2.Bf6 Nxf6 3.Qxf6 Rad8
³ (-0.53) Depth: 5/11 00:00:00 10kN
1.Qh4 h5 2.a4 bxa4 3.c4 Nb4
µ (-0.72) Depth: 6/19 00:00:00 34kN
1.Qh4 h5 2.Rae1 Bg7 3.Bf6 Bxf6 4.exf6 Rad8
µ (-0.75) Depth: 7/21 00:00:00 191kN
1.Qh4 h5 2.g4 Qxe5 3.gxh5 Be7 4.Bxe7 Rxe7 5.hxg6 fxg6
µ (-0.78) Depth: 8/25 00:00:01 526kN
1.Qh4 h5 2.Rae1 Bg7 3.Bf6 Bxf6 4.exf6 Qd8 5.Be4 Qxf6
µ (-0.81) Depth: 9/24 00:00:03 1607kN
1.Rxh7!
µ (-0.78) Depth: 9/30 00:00:05 3025kN
1.Rxh7 Bg7 2.Rah1 Qxe5 3.c3 b4 4.cxb4 axb4 5.axb4 Reb8
= (0.13) Depth: 9/32 00:00:10 6046kN
1.Rxh7!
² (0.44) Depth: 10/32 00:00:15 9412kN
1.Rxh7 Bg7 2.Bf6 Nxf6 3.exf6 Bxf6 4.Bxg6 Bg7 5.Bd3 Qe5
² (0.63) Depth: 10/32 00:00:20 11737kN
1.Rxh7 Bg7 2.Bf6 Nxf6 3.exf6 Bxf6 4.Bxg6 Bg7 5.Bd3 Qe5
² (0.38) Depth: 11/32 00:00:26 15949kN
1.Rxh7!
² (0.69) Depth: 12/36 00:01:27 62716kN
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