Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Fritz in Zugzwang...and funny tablebase handling?

Author: Uri Blass

Date: 22:46:34 04/16/01

Go up one level in this thread


On April 17, 2001 at 00:58:23, Aloisio Ponti Lopes wrote:

>This is a game that was played just for fun (1 processor for 2 engines... :-(
>don't have the money to buy my dual). Time is 2 min. + 12 sec/ move increment.
>Moves were entered manually.
>
>[Event "Top-Ten"]
>[Site "Ponti Chess Club"]
>[Date "2001.04.17"]
>[Round "1"]
>[White "Chess Tiger 14.0"]
>[Black "Fritz 6"]
>[Result "1-0"]
>[Opening "B23 Sicilian: Closed"]
>
>1.e4 c5 2.Nc3 g6 3.Nf3 Nc6 4.a3 Bg7 5.Rb1 e6 6.b4 b6 7.Bb2 d6 8.Bb5 Ne7 9.Nd5
>O-O 10.Nf6+ Bxf6
>11.Bxf6 Bb7 12.O-O cxb4 13.axb4 a6 14.Bd3 Nb8 15.Re1 Nd7 16.Bg5 Re8 17.Bh6 Qc7
>18.Qe2 a5
>19.Qe3 a4 20.Bb5 Bc6 21.Qc3 e5 22.Ng5 Rec8 23.Qf3 f6 24.Bc4+ d5 25.exd5 Bb7
>26.Ba2 Qxc2
>27.d6+ Qxa2 28.Qxb7 fxg5 29.dxe7 Qe6 30.Bxg5 Rcb8 31.Qe4 Re8 32.d4 a3 33.dxe5 a2
>34.Ra1
>Kg7 35.f4 h6 36.Bh4 Ra4 37.g3 Nc5 38.Bf6+ Kh7 39.Qc2 Qb3 40.Re2 Qxb4 41.Rxa2
>Qd4+ 42.Rf2
>Rc4 43.Qb2 Qd5 44.Rf1 Qc6 45.Rc1 Nd3 46.Rxc4 Qxc4 47.Qd2 Qc5+ 48.Kg2 Qd5+ 49.Kh3
>Qe6+ 50.Kh4
>Qf5 51.g4 Qe4 52.Kg3 Qd4 53.h3 Qg1+ 54.Qg2 Qd4 55.Qf1 Qe3+ 56.Qf3 Qd4 57.g5 Nc5
>58.Kh2 hxg5
>59.fxg5 b5 60.Qg4 Qxg4 61.hxg4 Ne6 62.Ra6 Nc7 63.Rd6 Kg8 64.e6 Kh7 65.Kg3 Kg8
>66.Kf4
>
>I can't believe it is Fritz in Zugzwang... oh, I see, it's Tiger with the white
>pieces... ;-)
>
>Nxe6+
>67.Rxe6 Kf7 68.Rb6 b4 69.Rxb4 Ra8 70.Rb3 Re8 71.Rd3 Ke6 72.Rd8 Rxe7 73.Bxe7 Kxe7
>74.Rd5
>Ke6 75.Rd2 Ke7 76.Ke5 Kf7 77.Rd7+ Ke8
>
>[D] 4k3/3R4/6p1/4K1P1/6P1/8/8/8 w - - 0 78
>
>Very interesting, I could not see the reason why Tiger did not play Ke6 here.

The reason is very simple.
78.Kf6 is forcing a mate by tablebases or mate in 2 if black does not take the
rook and when the program finds one mate it does not continue to calculate.

Uri



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.