Author: Dieter Buerssner
Date: 15:05:07 01/01/03
Go up one level in this thread
On January 01, 2003 at 05:57:30, Eduard Nemeth wrote:
>5Q2/3k4/1q6/3n4/2pP4/2P5/P1K5/8 b - -
>
>In a game two player with Elo 2400, black played now 1...Qf6!
>This is the best move, then after 2. Qxf6, black won easy after few
>moves!
>
>On my P600, Zarkov 5.0 find this move under Genius 7 in only 1:40 minutes!
>
>Which program find this strongest move too?
Yace, current version, P4 2.53 Ghz, 250 MB hash:
30132631 40.234 1.84 11t 1...Qg6+ 2. Kb2 Ne3 3. Ka1H Qh5H 4. Qb8H Qd1+H
5. Qb1H Qd2H 6. Qb5+H Kd8H 7. Qg5+H Ke8H 8.
Qe5+H Kd7H 9. Qg7+H Ke6H 10. Qh6+H Kd5H 11.
Qg5+H Nf5H 12. Qxf5+H Kd6H {HT}
35328080 47.288 1.85 11t+ 1...Qf6 2. Qxf6 Nxf6 3. Kd2 Kc6 4. a3 Nd5 5. Ke1
35367665 47.345 1.85 11t 1...Qf6 2. Qxf6 Nxf6 3. Kb2H Kc6H 4. Kc1H Kd6H
5. Kd2H Kc7H 6. a3H Nh5H 7. Ke1H Kb6H 8. Ke2H
Ka5H 9. a4H Kxa4H {260}
40736208 54.140 1.85 11. 1...Qf6 2. Qxf6 Nxf6 3. Kb2 Kc6 4. Kc1 Kd6 5.
Kd2 Kc7 6. a3 Nh5 7. Ke1 Kb6 8. Ke2 Ka5 9. a4
Kxa4 {260}
45135305 59.912 2.15 12t 1...Qf6 2. Qxf6 Nxf6 3. Kb2 Kc6 4. Kc1 Nd5 5.
Kb2 Kb6 6. Kc2 Ka6 7. Kb2H Ne3H 8. Ka3H Kb7H 9.
Ka4H Ka7H 10. Kb5H Nc2H 11. a3H Nxa3+H 12. Kc5H
{HT} {260}
68390939 1:30.8 2.15 12. 1...Qf6 2. Qxf6 Nxf6 3. Kb2 Kc6 4. Kc1 Nd5 5.
Kb2 Kb6 6. Kc2 Ka6 7. Kb2 Ne3 8. Ka3 Kb7 9. Ka4
Ka7 10. Kb5 Nc2 11. a3 Nxa3+ 12. Kc5 {HT} {260}
74901523 1:39.5 2.20 13t 1...Qf6 2. Qxf6 Nxf6 3. Kb2 Kc6 4. Kc1 Nd5 5.
Kb2 Kb6 6. Kc2 Ka5 7. Kb2H Kb5H 8. Kc2H Ka4H 9.
Kb2H Ka5H 10. Kc2H Kb5H {180}
137573500 3:01.9 2.20 13. 1...Qf6 2. Qxf6 Nxf6 3. Kb2 Kc6 4. Kc1 Nd5 5.
Kb2 Kb6 6. Kc2 Ka5 7. Kb2 Kb5 8. Kc2 Ka4 9. Kb2
Ka5 10. Kc2 Kb5 {180}
157513713 3:29.4 2.14 14t 1...Qf6 2. Qxf6 Nxf6 3. Kb2 Kc6 4. Kc1 Kb5 5.
Kb2 Ka4 6. Kc2 Ka3 7. Kc1 Kxa2 8. Kd2 Nd5 {260}
433203086 9:18.5 2.14 14. 1...Qf6 2. Qxf6 Nxf6 3. Kb2 Kc6 4. Kc1 Kb5 5.
Kb2 Ka4 6. Kc2 Ka3 7. Kc1 Kxa2 8. Kd2 Nd5 {260}
493991433 10:35.6 2.20 15t 1...Qf6 2. Qxf6 Nxf6 3. Kb2 Kc6 4. Kc1 Nd5 5.
Kb2 Kb6 6. Kc2 Kb5 7. Kb2 Ka4 8. Kc2H Kb5H 9.
Kb2H Kb6H 10. Kc2H Kc6H 11. a3H Ne3+H 12. Kb2H
Kc7H 13. Kc1H Kb7H {180}
1342637928 28:04.5 2.20 15. 1...Qf6 2. Qxf6 Nxf6 3. Kb2 Kc6 4. Kc1 Nd5 5.
Kb2 Kb6 6. Kc2 Kb5 7. Kb2 Ka4 8. Kc2 Kb5 9. Kb2
Kb6 10. Kc2 Kc6 11. a3 Ne3+ 12. Kb2 Kc7 13. Kc1
Kb7 {180}
1453924441 30:25.1 2.21 16t 1...Qf6 2. Qxf6 Nxf6 3. Kb2 Kc6 4. Kc1 Nd5 5.
Kb2 Kb6 6. Kc2H Kb5H 7. Kc1H {HT}
The score is not convincing yet. After Qf6 QxQ NxQ it is much easier. Without
the Qs on board, search depths are reached much faster:
1950221 29.372 -2.67 15. 3. Kb2 Kc6 4. Kc2 Kb5 5. Kc1 Ka4 6. Kb2 Kb5 7.
Kc2 Nd5 8. Kb2 Kc6 9. Kc2 Nf6 10. Kb2 Nd5 11.
Kc2 Nf6 12. Kb2 Nd5 {-180}
2018104 30.886 -3.07 16-- 3. Kb2 Kc6 4. Kc2
3774488 57.641 -3.84 16t 3. Kb2 Kc6 4. Kc2 Nd5 5. a3 Kb5 6. Kc1 Nxc3 7.
Kc2 Nd5 8. Kb2 Ka4 9. Ka2 c3 10. Kb1 Kxa3 11.
Kc2 {-340}
4191280 1:04.9 -3.84 16. 3. Kb2 Kc6 4. Kc2 Nd5 5. a3 Kb5 6. Kc1 Nxc3 7.
Kc2 Nd5 8. Kb2 Ka4 9. Ka2 c3 10. Kb1 Kxa3 11.
Kc2 {-340}
4520441 1:11.1 -4.24 17-- 3. Kb2 Kc6 4. Kc2 Kb5 5. Kc1 Ka4 6. a3
4671074 1:12.5 -8.00 17-- 3. Kb2 Kc6 4. Kc2 Kb5 5. a3
6693327 1:40.2 -8.00 17t 3. Kb2 Kc6 4. Kc2H Kb5H 5. Kc1H Ka4H 6. Kb2H
Nd5H 7. a3H Nf4H 8. Ka2H Ne6H 9. d5H Nc5H 10.
Kb2H Ne4H 11. Kc2H Kxa3H 12. Kc1H Kb3H 13. Kd1H
{-260}
6844768 1:45.2 -8.00 17. 3. Kb2 Kc6 4. Kc2 Kb5 5. Kc1 Ka4 6. Kb2 Nd5 7.
a3 Nf4 8. Ka2 Ne6 9. d5 Nc5 10. Kb2 Ne4 11. Kc2
Kxa3 12. Kc1 Kb3 13. Kd1 {-260}
6844831 1:45.2 -Mat29 18-- 3. Kb2 {-180}
12669216 2:26.3 -Mat28 18t 3. Kb2 Kc6 4. Kc1 Nd5 5. Kc2 Kb6 6. Kb2 Kb5 7.
Kc2 Ka4H 8. Kb2H Nf6H 9. Kb1H Ka3H 10. Ka1H
Nd5H 11. Kb1H Nxc3+H 12. Kc2H Nxa2H {EGTB} 13.
d5! Ka4 14. d6 Nb4+ 15. Kc3 Kb5!! 16. d7 Nc6!!
17. Kc2 Kb4! 18. Kd2 c3+ 19. Ke2 c2 20. d8=Q
Nxd8!! 21. Kd2! Kb3!! 22. Kc1! Nf7 23. Kd2 Ne5!
24. Ke3 c1=Q+! 25. Ke4 Qg5! 26. Kd4 Nc4! 27.
Ke4! Kc3! 28. Kf3 Nd2+ 29. Kf2 Kd3! 30. Ke1
Qg1#! {-1341}
13915985 2:35.0 -Mat28 18t+ 3. Kc1 Kc6 4. Kb2 Kb6 5. Kc1 Nd7 6. Kb2 Nb8 7.
a3 Kb5 8. d5 Ka5H 9. a4H Kxa4H 10. d6H Kb5H 11.
Ka2H Kc5H 12. Kb2H Nc6H 13. d7H Kb6H 14. d8=Q+H
Kc5H {HT}
14485239 2:38.5 -Mat31 18t 3. Kc1 Kc6 4. Kb2 Kb6 5. Kc1 Ne4 6. Kc2 Kc6 7.
Kb2 Kb5 8. a3 Nf6 9. Kb1H Kb6H 10. Ka1H Nd5H
11. Kb2H Kc6H 12. Kc2H Kb5H 13. Kc1H Nxc3H 14.
Kc2H Nd5H 15. Kd2H Ka4H 16. Ke1H Nc3H 17. Kd2H
Ne4+H 18. Ke3H Kxa3H {EGTB} 19. Kxe4! c3!! 20.
Kd3! Kb3 21. d5 c2! 22. Kd4 c1=Q 23. Ke5! Qd1
24. d6 Qg4 25. d7 Qxd7! 26. Ke4 Qe7+ 27. Kf4
Qf6+ 28. Kg4 Kc3 29. Kg3 Kd3 30. Kh3 Qg6 31.
Kh4 Ke3 32. Kh3 Kf3! 33. Kh4 Qh6# {-1001}
18421607 3:07.6 -Mat24 19t 3. Kc1 Kc6 4. Kb2 Nd5 5. Kc2 Kb5 6. Kb2 Ka4 7.
a3 Ne3 8. Ka2 Nd1 9. Kb1 Nxc3+ 10. Kc2 Nb5H 11.
Kb2H Nxa3H {EGTB} 12. d5 Nb5!! 13. d6! Nxd6!
14. Kc3! Ka5 15. Kc2 Kb4! 16. Kd2 c3+ 17. Ke2
c2 18. Kd2! Kb3!! 19. Kc1! Nb5! 20. Kd2 Nc3!
21. Ke3 c1=Q+! 22. Kf3 Qg5! 23. Kf2 Kc4 24. Kf3
Kd3! 25. Kf2 Ne2! 26. Kf3 Qg3#! {-1341}
[...]
44106533 5:59.9 -Mat23 21t 3. Kc1 Kc6 4. Kc2 Nd5 5. Kb2 Kb5 6. Kc2 Ka5H 7.
Kb2H Ka4H 8. a3H Ne3H 9. Ka2H Nd1H 10. Kb1H
Kb3H 11. Kc1H Nxc3H 12. Kd2H Nd5H 13. Ke2H
Kxa3H {EGTB} 14. Kf3! Nb6 15. Ke3 c3 16. Kd3!
Kb3 17. d5! c2 18. Kd2! Nxd5 19. Kc1! Nc3! 20.
Kd2 Kb2! 21. Ke3 c1=Q+! 22. Kf3 Qg5! 23. Kf2
Kc2! 24. Kf3 Kd3! 25. Kf2 Ne2! 26. Kf3 Qg3#!
{-1341}
>Fallow variation in the HV is only a draw:
>
>
>[Event "?"]
>[Site "?"]
>[Date "2003.01.01"]
>[Round "?"]
>[White "?"]
>[Black "?"]
>[Result "*"]
>[SetUp "1"]
>[FEN "5Q2/3k4/1q6/3n4/2pP4/2P5/P1K5/8 b - -"]
>
>1... Qg6+ 2. Kb2 Ne3 3. Ka3 Qd6+ 4. Qxd6+ Kxd6 5. Kb4 * and draw.
After some time, I get a draw score at the end of the line. Qg6 allows still a
win by going through a repetition of position (depends on the chess engine, if
they do it or not).
Regards,
Dieter
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