Author: Dieter Buerssner
Date: 11:50:47 02/10/02
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On February 09, 2002 at 19:06:18, Ed Schröder wrote:
>I have a list left of 5 difficult postions for Rebel, of which I think these
>should be solved much faster.
>
>k2N2K1/8/8/8/5R2/3n4/3p4/8 w - - bm Rf7 (Troitzky);
As Uri pointed out, TBs can help here. Uri pointed out KQNKR, a TB I do not
have, so I cannot check.
Yace, without TBs on K6-2 475, 20 Mb hash:
15478460 1:59.9 -4.38 12t 1. Rf1 Ne1 2. Ne6 d1=Q 3. Rf7 Qg4+ 4. Ng7 Nd3
5. Re7 Kb8 6. Kf8 Qf3+ 7. Ke8 Qf6 {-501}
18987519 2:30.3 -4.37 12t+ 1. Rf7 d1=Q 2. Nc6 Qg4+ 3. Kf8 Qc8+ 4. Kg7 Ne5
5. Nxe5 Qd8
19382351 2:32.8 -3.95 12++ 1. Rf7 d1=Q 2. Nc6 Qg4+ 3. Kf8 Qc8+ 4. Kg7 Ne5
5. Nxe5 Qd8
19507844 2:33.7 -2.95 12++ 1. Rf7 d1=Q 2. Nc6 Qg4+ 3. Kf8 Qc8+ 4. Kg7 Ne5
5. Nxe5 Qd8
19732919 2:35.3 0.00 12t 1. Rf7 d1=Q 2. Nc6 Qg4+ 3. Kf8 Qc8+ 4. Kg7 Qxc6
5. Rf8+ Ka7 6. Rf7+ Kb8 7. Rf8+ Kc7 8. Rf7+ Kd8
9. Rf8+ Kd7 10. Rf7+ Kc8 11. Rf8+ Kc7 {-841}
23703530 3:00.3 0.00 12. 1. Rf7 d1=Q 2. Nc6 Qg4+ 3. Kf8 Qc8+ 4. Kg7 Qxc6
5. Rf8+ Ka7 6. Rf7+ Kb8 7. Rf8+ Kc7 8. Rf7+ Kd8
9. Rf8+ Kd7 10. Rf7+ Kc8 11. Rf8+ Kc7 {-841}
24130171 3:03.1 0.00 13t 1. Rf7 d1=Q 2. Nc6 Qg4+ 3. Kf8 Qc8+ 4. Kg7 Qxc6
5. Rf8+ Ka7 6. Rf7+ Kb8 7. Rf8+ Kc7 8. Rf7+ Kd8
9. Rf8+ Kd7 10. Rf7+ Kc8 11. Rf8+ Kc7H 12.
Rf7+H Kd8H 13. Rf8+H Kd7H 14. Rf7+H Kc8H 15.
Rf8+H Kc7HR {-841}
>2n5/8/Pp5n/5N2/8/5k2/3P4/7K w - - bm d4 (Troitzky);
As was pointed out already, there is something wrong here. After d4, Yace can
prove, that black will mate. Can you correct this position?
>1k4r1/3r1p1q/1p2pQpP/pPp1P1B1/P1Pp2P1/3P1R2/2n1KR2/8 w - - bm Qxf7;
Perhaps, Kd2 and Qxf7 in the second move is also enough to win
>8/7p/p2p4/P7/1p2k1P1/1P2p2r/2P1R1KP/8 b - - bm Rxh2+;
In fast tests I have done (tried few lines), Rf3 was also winning. What do
others think of Rf3?
>2rr2k1/1pqbbppp/p3p3/4p3/2P5/2N1P1P1/PP2QPBP/2RR2K1 w - - bm c5; id Anand;
Can anybody show a line?
>I am looking forward to the analysis of other engines.
Uri showed some analysis of Yace. Not surprisingly, I get similar results with
my newest version.
Regards,
Dieter
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