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Subject: Larsen- Spassky 1970 - this one is a little harder

Author: Mike Byrne

Date: 22:11:17 01/02/03


[d]2kr3r/ppp1qpp1/2p5/2b2b1p/2P1pPn1/1P2P1PP/PBQPB3/RN2K2R b KQ - 0 1;bm 12...
h4


Out the programs I tested, only Fritz and Junior were able to find it in less
than 3 minutes.  Deep Junior 7.0 on my machine took just 31 seconds.

Larsen,B - Spassky,B [A01]
Informant 9/25, 1970

1.b3 e5 2.Bb2 Nc6 3.c4 Nf6 4.Nf3 e4 5.Nd4 Bc5 6.Nxc6 dxc6 7.e3 Bf5 8.Qc2 Qe7
9.Be2 0-0-0 10.f4 Ng4 11.g3 h5 12.h3 h4 13.hxg4 hxg3 14.Rg1 Rh1 15.Rxh1 g2
16.Rf1 Qh4+ 17.Kd1 gxf1Q+ 0-1

Voted 7th Best Game of Chess Informant Volumes 1 through 64.




Analysis by Fritz 8:

12...Nf6 13.a3 Qd7 14.Bxf6 gxf6 15.b4 Bd6 16.Nc3 Qe6 17.Qa4
    (-1.00)   Depth: 8/10   00:00:00
12...Nf6 13.a3 Qd7 14.Bxf6 gxf6 15.b4 Bd6 16.Nc3 Qe6 17.Qa4
    (-1.00)   Depth: 8/10   00:00:00
12...Nf6 13.a3 Qd7 14.Bxf6 gxf6 15.b4 Bd6 16.Nc3 Qe6 17.Qa4
    (-0.91)   Depth: 9/23   00:00:00  110kN
12...Nf6 13.a3 Qe6 14.b4 Be7 15.Qa4 Kb8 16.Bd4 c5 17.bxc5 Bxh3
    (-0.97)   Depth: 10/27   00:00:01  609kN
12...Nf6 13.a3 Qe6 14.b4 Be7 15.Qa4 Kb8 16.Bd4 c5 17.bxc5 Bxh3
    (-0.97)   Depth: 11/30   00:00:04  2342kN
12...Nf6 13.a3 Qe6 14.b4 Be7 15.Qa4 Kb8 16.Bf1 c5 17.Nc3 Qd7 18.Qc2
    (-0.94)   Depth: 12/33   00:00:13  7179kN
12...Nf6 13.a3 Qe6 14.b4 Be7 15.Qa4 Kb8 16.Bd4 a6 17.Bf1 h4 18.g4 Bg6
    (-0.88)   Depth: 13/32   00:00:30  16423kN
12...Nf6 13.a3 Qe6 14.b4 Be7 15.Qa4 Kb8 16.Bd4 a6 17.Bf1 Nd7 18.Nc3
    (-0.78)   Depth: 14/38   00:01:08  37091kN
12...h4!
    (-0.81)   Depth: 14/39   00:02:53  96832kN
12...h4!
    (-0.97)   Depth: 14/39   00:03:21  111577kN

( MFB 03.01.2003)

Larsen,B - Spassky,B
2kr3r/ppp1qpp1/2p5/2b2b1p/2P1pPn1/1P2P1PP/PBQPB3/RN2K2R b KQ - 0 1

Analysis by Deep Fritz 6:

12...Nxe3--
    (0.56)   Depth: 1/4   00:00:00
12...Nf6
    (-0.97)   Depth: 1/9   00:00:00
12...Nf6 13.Nc3
    (-0.88)   Depth: 2/8   00:00:00
12...Nf6 13.Nc3
    (-0.88)   Depth: 2/8   00:00:00
12...Nf6 13.Nc3
    (-0.88)   Depth: 2/8   00:00:00
12...Nf6 13.Nc3
    (-0.88)   Depth: 2/8   00:00:00
12...Nf6 13.Nc3
    (-0.88)   Depth: 2/8   00:00:00
12...Nf6 13.Nc3 h4
    (-0.97)   Depth: 3/12   00:00:00
12...Nf6 13.a3 h4 14.g4
    (-0.94)   Depth: 4/15   00:00:00  2kN
12...Nf6 13.a3 h4 14.b4 Bd6
    (-0.84)   Depth: 5/16   00:00:00  7kN
12...Nf6 13.a3 Bd6 14.b4 g5 15.fxg5 Bxg3+ 16.Kd1
    (-0.81)   Depth: 6/16   00:00:00  21kN
12...Nf6 13.a3 Bd6 14.b4 c5 15.Nc3 h4
    (-0.75)   Depth: 7/19   00:00:00  71kN
12...Nf6 13.a3 Qe6 14.b4 Be7 15.Qa4 a6 16.Bf1
    (-0.78)   Depth: 8/21   00:00:00  138kN
12...Nf6 13.a3 Bb6 14.b4 c5 15.Nc3 Qe6 16.Na4 Bxh3 17.Nxc5
    (-0.72)   Depth: 9/25   00:00:00  419kN
12...Nf6 13.a3 Qe6 14.b4 Be7 15.Bf1 c5 16.Nc3 h4 17.g4
    (-0.81)   Depth: 10/29   00:00:02  1976kN
12...Nf6 13.a3 Qe6 14.b4 Be7 15.Bf1 c5 16.Nc3 h4 17.g4 Bg6
    (-0.72)   Depth: 11/29   00:00:04  3264kN
12...Nf6 13.a3 Qe6 14.b4 Be7 15.Qa4 Kb8 16.Bd4 a6 17.Bf1 h4 18.g4
    (-0.69)   Depth: 12/31   00:00:08  7827kN
12...Nf6 13.a3 Qe6 14.b4 Be7 15.Bf1 c5 16.Nc3 Rhg8 17.bxc5 Bxc5 18.Rb1
    (-0.78)   Depth: 13/35   00:00:38  34672kN
12...h4!
    (-0.81)   Depth: 13/35   00:01:10  67113kN
12...h4 13.hxg4 hxg3 14.Rg1 Bxe3 15.dxe3 Rh1 16.Rxh1 g2 17.Rh2
    (-0.94)   Depth: 13/38   00:01:31  84783kN

( MFB 03.01.2003)


Larsen,B - Spassky,B
2kr3r/ppp1qpp1/2p5/2b2b1p/2P1pPn1/1P2P1PP/PBQPB3/RN2K2R b KQ - 0 1

Analysis by Deep Junior 7:

12...Nh2 13.Rxh2 f6
    (0.94)   Depth: 3   00:00:00
12...Nf6 13.Nc3
    (-1.06)   Depth: 3   00:00:00
12...Nf6 13.Nc3 Qe6 14.h4
    (-1.22)   Depth: 6   00:00:00  5kN
12...Nf6 13.Nc3 Qe6 14.Bf1 Qd6 15.Bg2
    (-1.21)   Depth: 9   00:00:00  73kN
12...Nf6 13.a3 Qe6 14.b4 Be7 15.Bf1 Kb8 16.b5 cxb5
    (-1.21)   Depth: 12   00:00:00  617kN
12...Nf6 13.Nc3 a6 14.h4 g6 15.Na4 Ba3 16.Bxa3 Qxa3
    (-1.06)   Depth: 15   00:00:08  11217kN
12...Nxe3 13.dxe3 Bxe3 14.Qc3 Bd4 15.Qc1 e3 16.Bxd4 Rxd4 17.Qc3 Qe4 18.Rh2 Rhd8
19.Bxh5
    (-1.26)   Depth: 15   00:00:23  14432kN
12...h4 13.Bxg4 Bxg4
  -+  (-1.44)   Depth: 15   00:00:31  27336kN

( MFB 03.01.2003)




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