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Subject: Re: Dutch Open CCC Leiden - 1st weekend summary

Author: Anthony Cozzie

Date: 06:16:06 10/18/04

Go up one level in this thread


Quite an interesting game.

Zappa doesn't need very much time to avoid Rh4, but I think this is an
evaluation issue rather than a search issue, because it scores them very
closely.

1... Rh8-h4 2. Rb1xb7 Qd7xb7[S] 3. Ne6xg5 Rh4-h5 4. Qe1-e6 Kg8-h8 5. Ng5-e4
Rh5-e5 6. Qe6-h3 Kh8-g8
 = (1.03)	Depth: 9/23	00:00:06.07	7029kN (1158 KN/s, 133 splits, 17 aborts)
1... Ra8-e8 2. Qe1-g3 Bb7-c6 3. Ne6-c7 Be7-c5 4. Kg1-h1 Re8-e2 5. Rb1-b8 Kg8-f7
6. Rb8xh8 Bc6xg2 7. Qg3xg2 Re2xg2 8. Kh1xg2 Qd7xc7
 = (1.11)	Depth: 9/24	00:00:11.22	14547kN (1296 KN/s, 217 splits, 38 aborts)

After Rh4, Zappa thinks that Rxb7, while White's best shot, only saves a losing
position rather than actually winning:

1. Rb1xb7 Qd7xb7[S] 2. Ne6xg5[S] Be7-c5 3. Kg1-h1 f6xg5[S] 4. Qe1-e6 Kg8-h8 5.
Bd2-c3[S] Bc5-d4 6. Bc3xd4[S] Rh4xd4 7. Qe6-h6 Kh8-g8 8. Qh6-e6 Kg8-h8
 = (0.00)	Depth: 13/30	00:01:33.25	145751kN (1563 KN/s, 3774 splits, 292 aborts)

In fact, even some moves later, Zappa still thinks it is a draw.

[D]r6k/6q1/p7/2Q3p1/2P4r/3p4/P2B2PP/5R1K b - - 0 40
1... Ra8-e8 2. Bd2xg5 Rh4-e4 3. Bg5-d2 Re8-e5 4. Qc5-c8 Re5-e8 5. Qc8-f5 Re4-e2
6. Bd2-c3 Qg7xc3 7. Qf5-h5 Kh8-g8 8. Qh5-f7[S] Kg8-h8 9. Qf7-h5[S]
 = (0.00)	Depth: 14/31	00:03:13.85	341064kN (1759 KN/s, 8886 splits, 729 aborts)

So in fact Zappa would happily follow the same path as the Baron ;)

anthony



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