Author: Heiner Marxen
Date: 09:13:29 12/25/00
Go up one level in this thread
On December 25, 2000 at 11:39:34, Uri Blass wrote:
>On December 25, 2000 at 10:43:33, Heiner Marxen wrote:
>
>>That is not hard. Cited from Chest output:
>>
>>CHEST version 3.20, 14-May-2000
>>Options = -SLU
>>
>>W: Ke6 Qb6 Pd4 Pd5 Pe4 Pe5 Pf4 Pf5 (8)
>>B: Ka8 Qe3 Rd3 Rf3 Be2 Be1 Nc3 Ng3 Pb3 Pc5 Pc4 Pd6 Pf6 Pg5 Pg4 Ph3 (16)
>>FEN: k7/8/1Q1pKp2/2pPPPp1/2pPPPp1/1pnrqrnp/4b3/4b3 w - -
>>analysing (mate in 8 moves):
>>Solution (in 6 moves):
>> Ke6 - d7
>>Total Time (virt) = 1.980 sec
>This position is more easy for chest than to other programs.
That is quite possibly true. But then maybe not; I did not check.
Sometimes there are surprises.
>Here is a more hard illegal position(I found that 1.Qa3 is a winning move if you
>ignore the fact that the position is illegal and this position is the position
>after 1.Qa3 Kd8):
>
>[D]3k4/8/3pKp2/2pPPPp1/2pPPPp1/Qpnrqrnp/4b3/4b3 w - - 0 1
>
>White begins and win.
>
>I believe that Chest can also solve this position but it is going to take more
>time.
>
>A possible solution begins with
>1.Qa5+ Kc8 2.Qa8+ Kc7 3.Qc6+ Kb8 4.Kd7
>
>I guess that that the position is mate in 10 but I did not check it.
>
>Uri
Also not very hard. It is mate in 8:
CHEST version 3.20, 14-May-2000
Options = -sSLU
Input file: 'i.ccc113c'
Reading job:
# Posted by Uri Blass on December 25, 2000 at 11:39:34:
# Subject: Re: Another Christmas Position
W: Ke6 Qa3 Pd4 Pd5 Pe4 Pe5 Pf4 Pf5 (8)
B: Kd8 Qe3 Rd3 Rf3 Be2 Be1 Nc3 Ng3 Pb3 Pc5 Pc4 Pd6 Pf6 Pg5 Pg4 Ph3 (16)
FEN: 3k4/8/3pKp2/2pPPPp1/2pPPPp1/Qpnrqrnp/4b3/4b3 w - -
analysing (mate in 10 moves):
# 1 0.00 0.87 1- 0
# 2 0.00 1.00 1- 0
# 3 0.01 0.99 57- 0
# 4 0.04 1.25 275- 0
# 5 0.19 1.74 1582- 0
# 6 0.76 2.24 6704- 0
# 7 3.21 2.61 29232- 0
# 8 12.75 2.85 121711- 0
Solution (in 8 moves):
Qa3 - a8
refu 1: Qa5+ Kc8 [ 7-]
solu 37: Ke8 [ 1+]
refu 2: Qa8+ Kc7 [ 6-]
solu 42: Kc7 [ 7+]
refu 3: fxg5 Qxe4 [ 7-]
solu 43: Ncxe4 [ 7+]
refu 4: exd6 Qxe4+ [ 7-]
refu 5: exf6 Qxe4+ [ 8-]
refu 6: dxc5 Ncxe4 [ 7-]
refu 7: Qxb3 cxb3 [ 7-]
solu 38: Qxe4 [ 1+]
refu 8: Qa4 Nxa4 [ 7-]
solu 39: Qxe4 [ 1+]
refu 9: Qa6 Qxe4 [ 7-]
refu 10: Qa7 Kc8 [ 7-]
solu 1: gxf4 [ 1+]
solu 2: fxe5 [ 1+]
solu 3: dxe5 [ 1+]
solu 4: cxd4 [ 1+]
solu 5: Ngxe4 [ 1+]
solu 6: Nxf5 [ 1+]
solu 7: Nxd5 [ 1+]
solu 8: Ncxe4 [ 1+]
solu 9: Rxf4 [ 1+]
solu 10: Rxd4 [ 1+]
solu 11: Qxe4 [ 1+]
solu 12: Qxf4 [ 1+]
solu 13: Qxd4 [ 1+]
solu 14: h2 [ 1+]
solu 15: b2 [ 1+]
solu 16: Nf1 [ 1+]
solu 17: Nh5 [ 1+]
solu 18: Nh1 [ 1+]
solu 19: Na4 [ 1+]
solu 20: Na2 [ 1+]
solu 21: Nb5 [ 1+]
solu 22: Nb1 [ 1+]
solu 23: Nd1 [ 1+]
solu 24: Bf2 [ 1+]
solu 25: Bd2 [ 1+]
solu 26: Bd1 [ 1+]
solu 27: Bf1 [ 1+]
solu 28: Rf2 [ 1+]
solu 29: Rf1 [ 1+]
solu 30: Rd2 [ 1+]
solu 31: Rd1 [ 1+]
solu 32: Qd2 [ 1+]
solu 33: Qc1 [ 1+]
solu 34: Qf2 [ 1+]
solu 35: Qg1 [ 1+]
solu 36: Ke8 [ 1+]
refu 11: Qa2 bxa2 [ 7-]
refu 12: Qa1 Qxe4 [ 7-]
refu 13: Qb4 cxb4 [ 7-]
solu 40: Qxe4 [ 1+]
refu 14: Qxc5 Qxe4 [ 7-]
solu 41: Ncxe4 [ 4+]
refu 15: Qb2 Qxe4 [ 7-]
refu 16: Qc1 Qxe4 [ 7-]
refu 17: Kxf6 Qxf4 [ 7-]
refu 18: Kxd6 Ngxe4+ [ 7-]
refu 19: Kf7 Qxe4 [ 7-]
Refu tab: 19 refu, 43 solu
Time (virt) = 12.750 sec
Qa8+ Kc7 Qc6+ Kb8 Kd7 Nxd5 exd5 Qxe5 fxe5 Ba5 Qc8+ Ka7 Kc6 =*= Qb7#
Bf2 Qb6+ Ka8 Kc7 =*= Qb8#
Rc3 Qb6+ Ka8 Kc7 =*= Qb8#
Rd2 Qb6+ Ka8 Kc7 =*= Qb8#
b2 Qb6+ Ka8 Kc7 Ba5 Qxa5#
Rb3 Qa6#
b1=Q Qa6#
b1=R Qa6#
-*- Qb8#
c3 Qb6+ Ka8 Kc7 =*= Qb8#
Ka7 Kc8 =*= Qb7#
-*- Qb6+ Ka8 Kc7 Ba5 Qxa5#
-*- Qb8#
Ba5 Qc8+ Ka7 Kc6 =*= Qb7#
Bf2 Qb6+ Ka8 Kc7 =*= Qb8#
Qd2 Qb6+ Ka8 Kc8 Qb4 Qa6#
-*- Qb8#
Rc3 Qb6+ Ka8 Kc7 =*= Qb8#
Rd2 Qb6+ Ka8 Kc7 =*= Qb8#
b2 Qb6+ Ka8 Kc7 Ba5 Qxa5#
Rb3 Qa6#
b1=Q Qa6#
b1=R Qa6#
-*- Qb8#
c3 Qb6+ Ka8 Kc7 =*= Qb8#
Ka7 Kc8 =*= Qb7#
-*- Qb6+ Ka8 Kc7 Ba5 Qxa5#
-*- Qb8#
Qxe4 Qb6+ Ka8 Kc8 Qxf5+ e6 Qxe6+ dxe6 =*= Qb8#
-*- Qb8#
-*- Qb8#
Nxf5 Qb6+ Ka8 Kc7 Nb5+ Qxb5 Ba5+ Qxa5#
Ka7 Qb7#
-*- Qb8#
Nxd5+ exd5 Ba5 Qxa5#
-*- Qb8#
-*- Qb8#
Na2 Qb6+ Ka8 Kc7 Ba5 Qxa5#
-*- Qb8#
Na4 Qc7+ Ka8 Kc6 =*= Qb7#
Nb1 Qb6+ Ka8 Kc7 Ba5 Qxa5#
-*- Qb8#
Nb5 Qxb5+ Ka7 Kc7 Ba5+ Qxa5#
Ka8 Qb8#
-*- Qb7#
Ka8 Kc7 Ba5+ Qxa5#
Ka7 Qb7#
-*- Qb8#
Ncxe4 Qb6+ Ka8 Kc7 Ba5 Qxa5#
-*- Qb8#
Nd1 Qb6+ Ka8 Kc7 Ba5 Qxa5#
-*- Qb8#
Qxd4 Qb6+ Ka8 Kc8 =*= Qb8#
b2 Qb6+ Ka8 Kc8 b1=Q Qa6#
b1=R Qa6#
-*- Qb8#
Ka7 Kc8 =*= Qb7#
-*- Qb6+ Ka8 Kc6 =*= Qb7#
Kd8 Qd7#
end of solution tree (no duals except at top)
Total Time (virt) = 12.920 sec
Generally, in bizarre positions Chest appears to shines :-)
Heiner
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.