Author: Dieter Buerssner
Date: 12:49:46 06/28/02
Go up one level in this thread
On June 27, 2002 at 13:37:44, Georg v. Zimmermann wrote:
>On June 27, 2002 at 13:20:56, Roy Eassa wrote:
>
>>How can white shorten this mate, which takes 18 moves? :
>>
>>1.Rxh7+ Kxh7 2.Qh5+ Kg8 3.Rxg7+ Kxg7 4.Bh6+ Kh7 5.Bg5+ Kg7 6.Qh6+ Kf7
>>7.Qf6+ Kg8 8.Qg6+ Kh8 9.Bf6+ Rxf6 10.exf6 Qxe1+ 11.Kxe1 Nc2+ 12.Kf1 Ne3+
>>13.fxe3 Rd7 14.Qe8+ Kh7 15.Qxd7+ Ne7 16.Qxe7+ Kh6 17.Qg7+ Kh5 18.Qg5#
>
>I think white can't, you are right. Move 6 and 7 can get lost because of HT.
???
What do you mean by this? I think, HTs can introdroduce many sorts of artifacts
(especially in the lines shown), but they should never show a too short mate.
You reported mate in 15 earlier.
In another message, you were interested, how other engines will do.
Yace, K6-2 475:
1200138 7.977 0.00 8. 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bc1+ Kg8 6. Qg6+ Kh8 7. Qh6+ Kg8 8. Qg6+
{-1260}
1703903 11.122 0.40 9++ 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kg8 7. Qg6+ Kh8 8. Bf6+
Rxf6 9. exf6 Qxe1+ 10. Kxe1 Nc2+ 11. Kf1 Ne3+
12. fxe3 Rd7 13. f7 Nd4 14. exd4 Rxd4 {151}
1748437 11.470 1.40 9++ 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kg8 7. Qg6+ Kh8 8. Bf6+
Rxf6 9. exf6 Rd7 10. Qe8+ Kh7 11. Qxd7+ Ne7 12.
Qxe7+ Kg6 13. f7 Qd1 14. f8=Q Qa1 {651}
2341967 14.848 3.33 9t 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kg8 7. Qg6+ Kh8 8. Bf6+
Rxf6 9. exf6 Qxe1+ 10. Kxe1 Nxd3+ 11. Kf1 Rd7
12. Qe8+ Kh7 13. Qxd7+ Kg6 14. Qxb7 Ncb4 {321}
2472678 15.559 3.33 9. 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kg8 7. Qg6+ Kh8 8. Bf6+
Rxf6 9. exf6 Qxe1+ 10. Kxe1 Nxd3+ 11. Kf1 Rd7
12. Qe8+ Kh7 13. Qxd7+ Kg6 14. Qxb7 Ncb4 {321}
2510744 15.854 3.73 10++ 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kg8 7. Qg6+ Kh8 8. Bf6+
Rxf6 9. exf6 Qxe1+ 10. Kxe1 Nxd3+ 11. Kf1 Rd7
12. Qe8+ Kh7 13. Qxd7+ Kg6 14. f7 Kh7 15. f8=Q+
Ne7 {892}
2570683 16.298 4.73 10++ 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kg8 7. Qg6+ Kh8 8. Bf6+
Rxf6 9. exf6 Qxe1+ 10. Kxe1 Rd7 11. Qe8+ Kh7
12. Qxd7+ Kh8 13. f7 Nxd3+ 14. Qxd3 Na5 15.
f8=Q+ Kh7 {1232}
2634772 16.785 9.73 10++ 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kg8 7. Qg6+ Kh8 8. Bf6+
Rxf6 9. exf6 Qc2 10. Nxc2 Rd7 11. Qe8+ Kh7 12.
Qxd7+ Kh6 13. f7 Kg6 14. f8=Q Nxd3 {1232}
5019131 30.891 13.39 10t 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kg8 7. Qg6+ Kh8 8. Bf6+
Rxf6 9. exf6 Qxe1+ 10. Kxe1 Nc2+ 11. Kf1 Ne3+
12. fxe3 Rd7 13. Qe8+ Kh7 14. Qxd7+ Ne7 15.
fxe7 Bc8 16. Qxc8 {1081}
5272955 32.520 13.39 10. 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kg8 7. Qg6+ Kh8 8. Bf6+
Rxf6 9. exf6 Qxe1+ 10. Kxe1 Nc2+ 11. Kf1 Ne3+
12. fxe3 Rd7 13. Qe8+ Kh7 14. Qxd7+ Ne7 15.
fxe7 Bc8 16. Qxc8 {1081}
5334083 32.909 13.79 11++ 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kg8 7. Qg6+ Kh8 8. Bf6+
Rxf6 9. exf6 Rd7 10. Qe8+ Kh7 11. Qxd7+ Ne7 12.
Qxe7+ Kh8 13. Qxb7 Qxd3+ 14. Nxd3 Nxd3
5423148 33.493 14.79 11++ 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg8 6. Qg6+ Kh8 7. Bf6+ Rxf6 8.
exf6 Qxd3+ 9. Nxd3 Rd7 10. Qe8+ Kh7 11. Qxd7+
Ne7 12. Qxe7+ Kh6 13. f7 Kh7 14. f8=Q+ Kg6
{1572}
5429672 33.588 20.16 11++ 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg8 6. Qg6+ Kh8 7. Bf6+ Rxf6 8.
exf6 Qxd3+ 9. Nxd3 Rd7 10. Qe8+ Kh7 11. Qxd7+
Ne7 12. Qxe7+ Kg8 13. Nxb4 Be4 14. f7+ Kh7 15.
f8=Q+ Kg6 16. Nxa6 {1992}
13017776 1:12.3 Mat18 11t 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kf7 7. Qf6+ Kg8 8.
Qg6+H Kh8H 9. Bf6+H Rxf6H 10. exf6H Qxe1+H 11.
Kxe1H Nc2+H 12. Kf1H Ne3+H 13. fxe3H Rd7H 14.
Qe8+H Kh7H 15. Qxd7+H Ne7H 16. Qxe7+H Kh6H 17.
Qg7+H {HT} {731}
14363758 1:19.6 Mat18 11. 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kf7 7. Qf6+ Kg8 8. Qg6+
Kh8 9. Bf6+ Rxf6 10. exf6 Qxe1+ 11. Kxe1 Nc2+
12. Kf1 Ne3+ 13. fxe3 Rd7 14. Qe8+ Kh7 15.
Qxd7+ Ne7 16. Qxe7+ Kh6 17. Qg7+ {HT} {731}
31696323 2:47.0 Mat18 12t 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kf7 7. Qf6+ Kg8 8. Qg6+
Kh8 9. Bf6+H Rxf6H 10. exf6H Qxe1+H 11. Kxe1H
Nc2+H 12. Kf1H Ne3+H 13. fxe3H Rd7H 14. Qe8+H
Kh7H 15. Qxd7+H Ne7H 16. Qxe7+H Kh6H {HT} {731}
34166392 3:00.3 Mat18 12. 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kf7 7. Qf6+ Kg8 8. Qg6+
Kh8 9. Bf6+ Rxf6 10. exf6 Qxe1+ 11. Kxe1 Nc2+
12. Kf1 Ne3+ 13. fxe3 Rd7 14. Qe8+ Kh7 15.
Qxd7+ Ne7 16. Qxe7+ Kh6 {HT} {731}
88259138 7:25.2 Mat18 13t 1. Rxh7+ Kxh7 2. Qh5+ Kg8 3. Rxg7+ Kxg7 4. Bh6+
Kh8 5. Bg5+ Kg7 6. Qh6+ Kf7 7. Qf6+ Kg8 8. Qg6+
Kh8 9. Bf6+ Rxf6 10. exf6 Qxe1+ 11. Kxe1 Nc2+
12. Kf1 Ne3+ 13. fxe3 Rd7 14. Qe8+ Kh7 15.
Qxd7+ Ne7 16. Qxe7+ Kh6 17. Qg7+ Kh5 18. Qg5#
{731}
Regards,
Dieter
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