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

Author: Uri Blass

Date: 22:39:13 04/16/01

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On April 17, 2001 at 01:07:08, John Hatcher wrote:

>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 funniest thing is that Fritz 6 thinks that this is the strongest too.
>>Nalimov tablebases enabled for both of them (all 3-4-5 men from the WM-Paket 4
>>Cds Nalimov collection, installed to a separate partition of the hard disk).
>>
>>78.Kf6 Kxd7 79.Kxg6 Ke6 80.Kh6 Ke5 81.g6 Ke6 82.g7
>>Kf7 83.Kh7 Kf6 84.g8Q Ke5 85.Qd8 Ke4 86.g5 Ke3 87.g6 Ke2 88.g7 Ke1 89.g8Q Ke2
>>90.Qg2+ Ke1
>>91.Qdd2# 1-0
>>
>>Not the way a GM or a strong human player would mate Fritz...
>>
>>A. Ponti
>
>Well, this is just one man's opinion, but I would play 78. Kf6 without giving it
>much thought.  It's simple, it's sure, and an elementary win can be calculated
>(by a human) in a few seconds.  The simpler, the cleaner, the better.
>
>The humble opinion of a 2116 rated Expert.
>
>John

The simplest way to win is the following:
1.Ke6 Kf8 2.Re7 Kg8 3.Rf7 Kh8 4.Kf6 Kg8 5.Kxg6 Kh8 6.Rf8#

Uri



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