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Subject: Re: Easy test position

Author: Dieter Buerssner

Date: 15:16:31 08/07/02

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On August 07, 2002 at 10:08:31, José Carlos wrote:

>  Also from a recent game on ICC:
>
>1r1q1rk1/pbp1bp1p/1p2pnpQ/6N1/3P4/3B1N2/PPP2PPP/R4RK1 w - - 0 1 bm Ne5

A pedantic formal note. I think a semicolon is needed at the end of the cited
line.

Yace finds Ne5 fast, but discards is again. Later it finds it again. I think, in
this as in many other test positions, the judgement of material balance with
inequal material is crucial. I believe, here different engines can easily show
scores of more than one pawn difference, when actually seeing the same
line/idea.

Yace, K6-2 475. Only about 60% CPU was available:

    113813   0.983   0.33  5.  1. Rfe1 Qd6 2. c3 Rfd8 3. Re5 {-10}
    178182   1.599   0.26  6t  1. Rfe1 Qd6 2. c3 Rfd8 3. Re5 c5 {-10}
    405838   3.596   0.26  6.  1. Rfe1 Qd6 2. c3 Rfd8 3. Re5 c5 {-10}
    647373   5.624   0.21  7t  1. Rfe1 Qd6 2. c3 Rfd8 3. Ne4 Nxe4 4. Bxe4 {-10}
    735851   6.439   0.22  7t+ 1. c3 c5 2. Ne5 cxd4 3. Ng4 Bc6 4. Nxf6+ Bxf6
                               5. Nxh7H {-10}
   1038952   9.114   0.28  7t  1. c3 Qd5 2. Rfe1 Rfd8 3. c4 Qd6 4. Ne5 {-10}
   1713465  15.473   0.29  7t+ 1. Ne5 Qxd4 2. Bxg6 hxg6 3. Nxg6 Qd6 4. Rfd1
                               Qxd1+ 5. Rxd1 Bd6
   2515250  24.006   0.41  7t  1. Ne5 Re8 2. Ngxf7 Qxd4 3. c3 Qd5H 4. Qg5H b5H
                               {-10}
   2659679  25.308   0.41  7.  1. Ne5 Re8 2. Ngxf7 Qxd4 3. c3 Qd5 4. Qg5 b5
                               {-10}
   3464771  33.184   0.50  8t  1. Ne5 Qxd4 2. Bxg6 Qxe5 3. Bxh7+ Kh8 4. Bg6+
                               Kg8 5. Bxf7+ Rxf7 6. Qh8+ Kxh8H 7. Nxf7+H Kg7H
                               8. Nxe5H {-40}
   4358185  41.024   0.50  8.  1. Ne5 Qxd4 2. Bxg6 Qxe5 3. Bxh7+ Kh8 4. Bg6+
                               Kg8 5. Bxf7+ Rxf7 6. Qh8+ Kxh8 7. Nxf7+ Kg7 8.
                               Nxe5 {-40}
   6173319  59.974   0.31  9t  1. Ne5 Qxd4 2. Bxg6 Qxe5 3. Bxh7+ Kh8 4. Bg6+
                               Kg8 5. Bxf7+ Rxf7 6. Qh8+ Kxh8 7. Nxf7+ Kh7 8.
                               Nxe5 Rg8 {-40}
  14085224  2:27.5   0.32  9t+ 1. Rae1 Qd6 2. Ne5 Qd5 3. Be4 Rfd8 4. Bxd5 exd5
                               {641}
  16852607  2:55.6   0.33  9t  1. Rae1 Qd6 2. Ne5 Qd5 3. Be4 Qxd4H 4. Bxg6H
                               hxg6H 5. Nxg6H {HT} {-280}
  24040452  4:13.3   0.33  9.  1. Rae1 Qd6 2. Ne5 Qd5 3. Be4 Qxd4 4. Bxg6 hxg6
                               5. Nxg6 {HT} {-280}
  40527157  7:15.5   0.64 10t  1. Rae1 Bb4 2. c3 Bxf3 3. Nxf3 Be7 4. Ne5 Qd6
                               5. b4 Nd5 6. Rc1 {HT} {0}
  49571390  8:35.2   0.64 10.  1. Rae1 Bb4 2. c3 Bxf3 3. Nxf3 Be7 4. Ne5 Qd6
                               5. b4 Nd5 6. Rc1 {HT} {0}
  79702731 14:09.8   0.63 11t  1. Rae1 Bb4 2. c3 Bxf3 3. Nxf3 Bd6 4. a3 Ng4 5.
                               Qh3 Nf6 6. Ne5 Qe7 {HT} {0}
 108367518 19:09.0   0.64 11t+ 1. Ne5 Qxd4 2. Bxg6 Qxe5 3. Bxh7+ Kh8 4. Bd3+
                               Kg8 5. Rae1 Qxb2 6. Rxe6 Bxg2 7. Bh7+ Kh8 8.
                               Bf5+ Kg8H {HT} {-350}
 115111619 20:02.7   0.64 11t  1. Ne5 Qxd4 2. Bxg6 Qxe5H 3. Bxh7+H Kh8H 4.
                               Bd3+H Kg8H 5. Rae1H Qxb2H {HT} {-350}
 137310366 23:09.7   0.64 11.  1. Ne5 Qxd4 2. Bxg6 Qxe5 3. Bxh7+ Kh8 4. Bd3+
                               Kg8 5. Rae1 Qxb2 {HT} {-350}
 184220107 31:54.4   1.04 12++ 1. Ne5 Qxd4 2. Bxg6 Qxe5 3. Bxh7+ Kh8 4. Bd3+
                               Kg8 5. Rae1 Qxb2 6. Rxe6 Qxa2 7. Bh7+ Kh8 8.
                               Bf5+ Kg8 9. Rxe7 Bc8
 582992567 1:44:25   1.62 12t  1. Ne5 Bb4 2. Ng4 Re8 3. c3 Bd6 4. Bb5 c6 5.
                               Nxf6+ Qxf6 6. Qxh7+ Kf8 7. Ne4 Qf4 8. Nxd6 Qxd6
                               9. Qh6+ Ke7 10. Bc4 {HT} {80}

Regards,
Dieter




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