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Subject: Re: (EXAMPLE WILD5 POS) How long will your program take to find Nf2+

Author: Hans Havermann

Date: 09:03:46 08/27/00

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On August 27, 2000 at 09:41:32, Michel Langeveld wrote:

>(mate in 7)
>1QBK1Q1R/P1PPP2P/6QB/8/4N3/2n4n/p1kpp2p/rqb1qqr1 w - -; bm Nf2+; ce 32754; dm 7;
>pv Nf2+ Rxg6 Qf5+ Ne4 Qxe4+ Kc3 Bg7+ Rxg7 Qe5+ Kc4 Ba6+ Qb5 Qbxb5#;

Wim van Beusekom's MacChess 5.0.1 (which is no longer under active development)
finds this in about 7 seconds on my iMac:

1QBK1Q1R/P1PPP2P/6QB/8/4N3/2n4n/p1kpp2p/rqb1qqr1 w - -

02/01|00:00:03|     1198743| +165| Ng3+ Kd1 e8=Q h1=Q Nxh1 Rxg6 a8=Q Qxh1
03/01|00:00:03|     1280845| +165| Ng3+ Kd1 e8=Q h1=Q Nxh1 Rxg6 a8=Q Qxh1
03/02|00:00:04|     1348570| +456| Ng5+ Kd1 e8=Q h1=Q a8=Q Nxg5 Qxh1 Rxh1 Qxg5
04/01|00:00:05|     1744394| +456| Ng5+ Kd1 e8=Q h1=Q a8=Q Nxg5 Qxh1 Rxh1 Qxg5
04/31|00:00:07|     2672104|+M7  | Nf2+ Rxg6 Qf5+ Ne4 Qxe4+ Kc3 Bg7+ Rxg7 Qe5+
Kc4 Ba6+ Qb5 Qbxb5+



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