Author: Bernhard Bauer
Date: 23:50:47 12/09/98
Go up one level in this thread
On December 09, 1998 at 23:21:41, Tim Mirabile wrote:
>On December 09, 1998 at 22:46:46, Mike Castañuela wrote:
>
>>I don't know, but anyway in this endgame
>>maybe 66. Qf4 quickly ends the game too?
>>(66. ...Qh1 67. Kb7 +-)
>
>True, but I am more interested to know whether White can still win after 66.
>Qb7+?. I'm annotating the game for the club bulletins and I need to send in my
>notes by saturday or so.
Hallo,
if I force crafty to search for Qb7 it gives a draw.
Here some lines:
11-> 22.31 3.24 1. Qb7+ Ke5 2. Ra5+ Kf4 3. Rd5 Qa3+
4. Kb8 Qf8+ 5. Ka7 Qa3+ 6. Kb6 Qb4+
7. Rb5 Qd6+ 8. Ka7 Qa3+ 9. Kb8 Qd6+
10. Kc8 Qd4
12 22.99 -- 1. Qb7+
12 24.28 draw 1. Qb7+ Ke5 2. Ra5+ Kf4 3. Rd5 Qa3+
4. Kb8 Qf8+ 5. Ka7 Qa3+ 6. Kb6 Qb4+
7. Rb5 Qd6+ 8. Ka7 Qa3+ 9. Kb8 Qf8+
10. Kc7 Qe7+ 11. Kc8 Qxb7+ 12. Kxb7
<EGTB>
12-> 24.28 draw 1. Qb7+ Ke5 2. Ra5+ Kf4 3. Rd5 Qa3+
4. Kb8 Qf8+ 5. Ka7 Qa3+ 6. Kb6 Qb4+
7. Rb5 Qd6+ 8. Ka7 Qa3+ 9. Kb8 Qf8+
10. Kc7 Qe7+ 11. Kc8 Qxb7+ 12. Kxb7
<EGTB>
13 27.03 draw 1. Qb7+ Ke5 2. Ra5+ Kf4 3. Rd5 Qa3+
4. Kb8 Qf8+ 5. Ka7 Qa3+ 6. Kb6 Qb4+
7. Rb5 Qd6+ 8. Ka7 Qa3+ 9. Kb8 Qf8+
10. Kc7 Qe7+ 11. Kc8 Qxb7+ 12. Kxb7
<EGTB>
13-> 27.05 draw 1. Qb7+ Ke5 2. Ra5+ Kf4 3. Rd5 Qa3+
4. Kb8 Qf8+ 5. Ka7 Qa3+ 6. Kb6 Qb4+
7. Rb5 Qd6+ 8. Ka7 Qa3+ 9. Kb8 Qf8+
10. Kc7 Qe7+ 11. Kc8 Qxb7+ 12. Kxb7
<EGTB>
However, Rf4 is a mate in 22.
7-> 14.92 12.32 1. Rf4 Qa3+ 2. Qa7 Qg3 3. Qd7+ Ke5
4. Qc7+ Ke6 5. Rf6+ Kd5 6. Qxg3
8 15.72 ++ 1. Rf4!!
8 22.92 Mat22 1. Rf4 Qc3 2. Qb7+ Kd6 3. Qb4+ Qxb4
4. Rxb4 <EGTB>
8-> 26.12 Mat22 1. Rf4 Qc3 2. Qb7+ Kd6 3. Qb4+ Qxb4
4. Rxb4 <EGTB>
time=26.33 cpu=208% mat=4 n=1826423 fh=93% nps=69366
ext-> checks=344753 recaps=2104 pawns=2634 1rep=38463
predicted=0 nodes=1826423 evals=35051
endgame tablebase-> probes done=190781 successful=33065
hashing-> trans/ref=47% pawn=99% used=w8% b31%
SMP-> split=750 stop=118 data=6/64 cpu=55.01 elap=26.33
mate in 22 moves.
Kind regards
Bernhard
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