Author: John Merlino
Date: 09:53:05 11/29/02
Go up one level in this thread
On November 29, 2002 at 11:25:09, John Merlino wrote:
>On November 29, 2002 at 04:59:01, Rex wrote:
>
>>RebelRex(C) ver Talion(GM) on ICC.
>>
>>
>>Here RebelRex played 37...b3 for the loss. How long does it take your computer
>>to avoid this move because of the next GM's move 38.Nxg4!!
>>
>>[D]r7/2q1p3/3pPkp1/2pP1pNp/1pP2Bb1/3BN1K1/rP1R4/4R3 b - - 0 1
Assuming 37...b3 38.Nxg4 Kg7 {38...fxg4 loses quickly} 39.Ne5 Ra1 40.Rxa1 Rxa1,
the following position arises:
[D]8/2q1p1k1/3pP1p1/2pPNpNp/2P2B2/1p1B2K1/1P1R4/r7 w - - 0 42
CM9000, on a humble P3-733, finds 42.Nxg6! in 21 seconds. How do other engines
fare?
Time Depth Score Positions Moves
0:00 1/3 0.58 1711 5.Nef3 Qb6 6.Rh2
0:00 1/3 0.68 3878 5.Nc6 Rg1+ 6.Kf2 Rg4 7.Nh3
0:00 1/4 0.68 5928 5.Nc6 Rg1+ 6.Kf2 Rg4 7.Nh3
0:00 1/5 0.80 17848 5.Nc6 Qb7 6.Nf7 Qc7 7.Bh6+ Kh7
8.Bg5
0:00 1/6 0.80 46491 5.Nc6 Rg1+ 6.Kf2 Rg4 7.Nh3 Kf6
8.Rd1 g5
0:01 1/7 0.91 90757 5.Nc6 Rg1+ 6.Kf2 Rg4 7.Nh3 Rh4
8.Kg2 Rg4+ 9.Kh2 Rh4
0:02 1/8 1.14 167168 5.Nc6 Rg1+ 6.Kf2 Rg4 7.Nh3 Rh4
8.Kg2 Rg4+ 9.Kh2 Rh4 10.Bg5
0:07 1/9 1.54 629281 5.Nc6 Rg1+ 6.Kh2 Ra1 7.Nh3 Ra8
8.Rg2 Rf8 9.Bg5 Re8
0:13 2/10 1.56 1265670 5.Nc6 Rg1+ 6.Kh2 Ra1 7.Nh3 Ra8
8.Bg5 Re8 9.Rg2 Kh7 10.Bh4
0:21 2/10 2.60 2017137 5.Nxg6 Rg1+ 6.Kh2 Rg4 7.Bxf5 Rxf4
8.Nxf4 Kf6 9.Rg2 Kxf5 10.Nxh5 Kg6
11.Nf4+ Kf5
0:36 3/11 2.64 3474651 5.Nxg6 Rg1+ 6.Kh2 Rg4 7.Bxf5 Rxf4
8.Nxf4 Kf6 9.Rg2 Kxf5 10.Nxh5 Kg6
11.Nf4+ Kf5 12.Ne2
1:16 4/12 2.64 6861024 5.Nxg6 Rg1+ 6.Kh2 Rg4 7.Bxf5 Rxf4
8.Nxf4 Kf6 9.Rg2 Kxf5 10.Nxh5 Kg6
11.Nf4+ Kf5 12.Ne2
4:40 5/13 2.73 26598305 5.Nxg6 Rg1+ 6.Kh2 Rg4 7.Rf2 Kxg6
8.Bxf5+ Kg7 9.Bxg4 hxg4 10.Rg2
Qa5 11.Rxg4 Qa1 12.Ne4+ Kh7 13.Rh4+
Kg8
The point (apparently, because I certainly couldn't see this for myself) is, if
42...Kxg6, 43.Kh2! and now Black has no reasonable moves. According to CM,
43...Qa5 is best, with a score of over +10 for White. The only other two moves
that don't lead to a mate score are Rf1 and Rg1, both of which of course lead to
the immediate loss of the Rook.
Do I need to keep saying that I really wish I still had my P4? :-)
jm
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