Author: Jeremiah Penery
Date: 03:51:31 10/06/99
Go up one level in this thread
On October 06, 1999 at 00:58:15, Robert Hyatt wrote:
>On October 05, 1999 at 15:15:01, John Stanback wrote:
>
>>On October 05, 1999 at 01:14:03, Harald Faber wrote:
>>
>>>I remember I have heard that Junior has problems with "winning" pawns on a2/a7
>>>and h2/h7. I couldn't imagine. Now I have seen it with my own eyes:
>>>
>>>[Event "Chessnet"]
>>>[Site "?"]
>>>[Date "????.??.??"]
>>>[Round "?"]
>>>[White "King 2.55"]
>>>[Black "Junior 5"]
>>>[Result "*"]
>>>[ECO "D49"]
>>>[PlyCount "43"]
>>>
>>>1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3
>>>a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. Qf3 Bb4+ 14. Ke2 Rb8
>>>15. Nc6 Bb7 16. Bf4 Qd7 17. Bxb5 O-O 18. Bxb8 Rxb8 19. Rhc1 Bd6 20. Kf1 Bxc6
>>>21. Bxc6 Qa7 22. Rc2 *
>>>
>>>Now Junior5 takes the Ph2 and only is down with -1.00. After 23.g3 h5 (-1.32)
>>>24.Kg2 Ng4 (-1.40) 25.Rd1 Rf8 (-1.55)
>>>
>>>Black has some problems getting the bishop back into the game...
>>>
>>>So Uri, what does your latest Junior version (5.9?) play, also take the pawn?
>>>
>>>And I wonder which other programs take this pawn and which avoid this trap?
>>
>>Zarkov takes about 10 milliseconds to switch from Bxh2 to Rc8 :).
>>
>>John
>
>
>Crafty _never_ considers Bxh2:
>
> nss depth time score variation (1)
> 1 0.00 -2.19 22. ... Qc7
> 1-> 0.00 -2.19 22. ... Qc7
> 2 0.00 -2.32 22. ... Qc7 23. Qd3
> 2 0.01 -2.31 22. ... Qa6+ 23. Kg1 d3
> 2-> 0.01 -2.31 22. ... Qa6+ 23. Kg1 d3
> 3 0.02 -2.48 22. ... Qa6+ 23. Kg1 Qc8 24. Qd3
> 3 0.03 -2.31 22. ... Qc7 23. Qd3 Bb4
> 3 0.03 -2.30 22. ... Qe7 23. Qd3 Be5
> 3-> 0.03 -2.30 22. ... Qe7 23. Qd3 Be5
> 4 0.04 -2.39 22. ... Qe7 23. Qd3 Be5 24. Kg1
> 4 0.06 -2.35 22. ... Qc7 23. Qd3 Rb6 24. Bd5
> 4-> 0.08 -2.35 22. ... Qc7 23. Qd3 Rb6 24. Bd5
> 5 0.12 -2.33 22. ... Qc7 23. Qd3 Be5 24. Bd5 Qd6
>
>
>It has an eval term to stop that nonsense. Many programs don't, still.
How long did you let it search? This is what I get from 16.18:
1 0.00 -2.16 22. ... Qc7
1-> 0.03 -2.16 22. ... Qc7
2 0.04 -2.48 22. ... Qc7 23. a4
2 0.04 -2.31 22. ... Qa6+ 23. Kg1 d3
2-> 0.09 -2.31 22. ... Qa6+ 23. Kg1 d3
3 0.10 -2.55 22. ... Qa6+ 23. Kg1 d3 24. Rd2
3 0.11 -2.28 22. ... Qc7 23. Qd3 Bb4
3 0.12 -2.27 22. ... Qe7 23. Qd3 Be5
3-> 0.15 -2.27 22. ... Qe7 23. Qd3 Be5
4 0.17 -2.59 22. ... Qe7 23. a4 e5 24. b3
4 0.20 -2.43 22. ... Qa6+ 23. Kg1 d3 24. Rd2 Rc8
4-> 0.23 -2.43 22. ... Qa6+ 23. Kg1 d3 24. Rd2 Rc8
5 0.30 -2.21 22. ... Qa6+ 23. Kg1 d3 24. Rd2 Be5
25. Rxd3 Rxb2
5 0.52 -2.16 22. ... Bxh2 23. g3 Qc7 24. Kg2 Bxg3
25. Qxg3
5-> 0.53 -2.16 22. ... Bxh2 23. g3 Qc7 24. Kg2 Bxg3
25. Qxg3
6 0.65 -2.22 22. ... Bxh2 23. g3 Qa6+ 24. Kg2 d3
25. Rd2 Rc8
6 0.79 -2.21 22. ... Qa6+ 23. Kg1 d3 24. Rd2 Be5
25. Rxd3 Rxb2
6-> 0.93 -2.21 22. ... Qa6+ 23. Kg1 d3 24. Rd2 Be5
25. Rxd3 Rxb2
7 1.67 -2.33 22. ... Qa6+ 23. Kg1 Be5 24. Rd2 Rb6
25. Be4 Qc4 26. a4 Nxe4 27. Qxe4
7 2.31 -2.08 22. ... Bxh2 23. g3 Rd8 24. Qd3 Bxg3
25. fxg3 Qe7
7-> 2.44 -2.08 22. ... Bxh2 23. g3 Rd8 24. Qd3 Bxg3
25. fxg3 Qe7
8 3.54 -1.91 22. ... Bxh2 23. g3 Qa6+ 24. Kg2 d3
25. Rd2 Bxg3 26. Kxg3 Qc4
8-> 4.26 -1.91 22. ... Bxh2 23. g3 Qa6+ 24. Kg2 d3
25. Rd2 Bxg3 26. Kxg3 Qc4
9 6.68 -2.05 22. ... Bxh2 23. g3 Qa6+ 24. Kg2 d3
25. Rd2 Bxg3 26. Kxg3 Qc4 27. a4
9-> 16.67 -2.05 22. ... Bxh2 23. g3 Qa6+ 24. Kg2 d3
25. Rd2 Bxg3 26. Kxg3 Qc4 27. a4
10 20.17 -1.93 22. ... Bxh2 23. g3 Qa6+ 24. Kg2 d3
25. Rd2 Bxg3 26. Kxg3 Qc4 27. a4 Rc8
10-> 41.77 -1.93 22. ... Bxh2 23. g3 Qa6+ 24. Kg2 d3
25. Rd2 Bxg3 26. Kxg3 Qc4 27. a4 Rc8
:(
Jeremiah
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