Author: Robert Hyatt
Date: 22:00:59 10/05/99
Go up one level in this thread
On October 05, 1999 at 06:13:57, blass uri 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? > >Junior5.9 plays at 120/40(actually 120/19) on p200 Rc8 1.13/16 with the main >line a4 Bxh2... but is smart enough to avoid Bxh2 after a4 happens in the game. > >It needs less than 1 minute to see that Bxh2 is bad after a4 and prefers another >move(Junior5.0 can also avoid Bxh2 after a4 by search but cannot do it before >a4) > >Junior5.9 did not like 22...Bxh2 from the first second. > >I could produce 22...Bxh2 with Junior5.9 only at 10 minutes/40 moves when >it changed its mind at depth 13 to Bxh2 but at 20 minutes/40 moves it jumped >from depth 12 to depth 14 and never considered Bxh2 as best. > >Junior5.9 is not perfect in avoiding Bxh2 moves but is clearly better in it >relative to Junior5. > >After 22..Rc7 23.a4 Junior5.9 suggested at 120/40 Rc7 and the evaluation >drpopped to 1.30 pawns for white. > >I used the watch command and Bxh2 is always in the first 14 best moves >so Junior avoids Bxh2 by some positional knowledge > >The difference between Bxh2 and the best move is small(always less than 0.2 pawn >and sometimes less than 0.1 pawn) > >Uri After Bxh2 g3 crafty has white ahead by +2.0 instantly...
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.