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Subject: Re: Revised ECM Test Suite (update)

Author: Omid David Tabibi

Date: 13:11:55 07/20/04

Go up one level in this thread


On July 20, 2004 at 15:24:36, Drexel,Michael wrote:

>On July 20, 2004 at 13:57:06, Uri Blass wrote:
>
>>On July 20, 2004 at 11:36:05, Omid David Tabibi wrote:
>>
>>>http://www.cs.biu.ac.il/~davoudo/pubs/ecmx.epd
>>>
>>>Remaining positions that are still unclear (the winning line is not clear):
>>>
>>>r3r1k1/pp3ppp/1qp5/2bbNQ2/5B2/2P5/PP3PPP/3RR1K1 w - - bm Rxd5; id "ECM.349";
>>
>>
>>Rxd5 seems to be a blunder
>
>A blunder isn´t necessarily bad :)
>
>[Event "URS cand master m"]
>[Site "URS"]
>[Date "1967.??.??"]
>[Round "?"]
>[White "Chistiakov, Alexander Nikolaevi"]
>[Black "Goldin, Alexander"]
>[Result "1-0"]
>[ECO "C67"]
>[PlyCount "47"]
>[EventDate "1967.??.??"]
>
>1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Bxc6 dxc6 7. Nxe5 Be7
>8. d4 O-O 9. c3 Nf5 10. Nd2 c5 11. dxc5 Bxc5 12. Qf3 Re8 13. Nb3 Bd6 14. Bf4 c6
>15. Rad1 Be6 16. Nc5 Bd5 17. Qh3 Bxc5 18. Qxf5 Qb6 19. Rxd5 cxd5 20. Qxf7+ Kh8
>21. Qxd5 Re7

21...Bxf2+ and black seems to have a clear advantage.


>22. Be3 Bxe3 23. Rxe3 Rd8 24. Ng6+ 1-0
>
>
>>After Rxd5 cxd5 Fritz can see nothing even after long analysis so if there is a
>>move to find it is not Rxd5
>>
>>New game
>>[D]r3r1k1/pp3ppp/1q6/2bpNQ2/5B2/2P5/PP3PPP/4R1K1 w - - 0 1
>>
>>Analysis by Fritz 8:
>>
>>2.Be3 Re7 3.Nd7 Qb5 4.Nxc5 Qxc5 5.Rd1 Qb5 6.Qg5
>>  µ  (-0.97)   Depth: 7/18   00:00:00  142kN
>>2.Qxf7+!
>>  µ  (-0.94)   Depth: 7/21   00:00:00  236kN
>>2.Qxf7+!
>>  µ  (-0.78)   Depth: 7/21   00:00:00  250kN
>>2.Qxf7+ Kh8 3.Qxd5 Bxf2+ 4.Kf1 Rf8 5.Re4 Rad8 6.Qb3 Qxb3 7.axb3
>>  ³  (-0.66)   Depth: 7/22   00:00:00  308kN
>>2.Qxf7+ Kh8 3.Qxd5 Bxf2+ 4.Kf1 Rf8 5.Re4 Rad8 6.Qb3 Qxb3 7.axb3
>>  ³  (-0.66)   Depth: 8/24   00:00:00  411kN
>>2.Qxf7+--
>>  µ  (-0.94)   Depth: 9/27   00:00:00  858kN
>>2.Qxf7+ Kh8 3.Qxd5 Bxf2+ 4.Kf1 Rf8 5.Nc4 Qa6 6.Re4 Be3 7.Qg5 Bxf4
>>  µ  (-1.31)   Depth: 9/29   00:00:00  1118kN
>>2.Be3!
>>  µ  (-1.28)   Depth: 9/29   00:00:00  1214kN
>>2.Be3!
>>  µ  (-1.12)   Depth: 9/29   00:00:00  1261kN
>>2.Be3 Re7 3.Nd7 Qb5 4.Nxc5 Qxc5 5.Rd1 Qb5 6.Rd2 Rae8 7.Qxd5
>>  µ  (-0.94)   Depth: 9/29   00:00:01  1519kN
>>2.Be3 Re7 3.Nd7 Qb5 4.Nxc5 Qxc5 5.Rd1 Qb5 6.b3 Qc6 7.Bd4
>>  µ  (-0.94)   Depth: 10/23   00:00:02  2483kN
>>2.Be3 Re7 3.Nd7 Qb5 4.Nxc5 Qxc5 5.Rd1 Qb5 6.b3 Qc6 7.Rd3 Rc7
>>  µ  (-1.06)   Depth: 11/32   00:00:04  5290kN
>>2.Be3 Re7 3.Nd7 Qc6 4.Nxc5 Qxc5 5.Rd1 Qb5 6.b3 Qc6 7.Qxd5 Qxc3 8.Qd8+ Re8
>>  µ  (-1.03)   Depth: 12/34   00:00:11  14969kN
>>2.Be3 Re7 3.Nd7 Qc6 4.Nxc5 Qxc5 5.Rd1 Qb5 6.b3 Qa5 7.Bd4 Rae8 8.h3 Qxa2 9.Qxd5
>>  µ  (-1.22)   Depth: 13/30   00:00:28  39052kN
>>2.Be3 Re7 3.Nd7 Qc6 4.Nxc5 Qxc5 5.Rd1 Qb5 6.Rd2 Rd8 7.Qg4 b6 8.Qd4 Ree8 9.h3
>>  µ  (-1.19)   Depth: 14/36   00:01:12  102443kN
>>2.Be3 Re7 3.Nd7 Qc6 4.Nxc5 Qxc5 5.Rd1 Qb5 6.Rd2 Rd8 7.Qg5 f6 8.Qf4 b6 9.Qd4 Re4
>>  µ  (-1.28)   Depth: 15/37   00:02:52  246025kN
>>2.Be3 Re7 3.Nd7 Qc6 4.Nxc5 Qxc5 5.Rd1 Qb5 6.Rd2 Rd8 7.Qg4 Qa5 8.a3 Qb6 9.Qh5
>>  µ  (-1.22)   Depth: 16/41   00:07:57  675496kN
>>2.Be3 Re7 3.Nd7 Qc6 4.Nxc5 Qxc5 5.Rd1 Qb5 6.Rd2 Rd8 7.h3 b6 8.Bd4 Re1+ 9.Kh2 f6
>>  µ  (-1.25)   Depth: 17/41   00:19:19  1661698kN
>>
>>(, MyTown 20.07.2004)
>>
>>Uri



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