Author: Robert Hyatt
Date: 21:58:15 10/05/99
Go up one level in this thread
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.
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