Author: Phil Dixon
Date: 15:11:02 05/22/99
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On May 22, 1999 at 15:13:22, Melvin S. Schwartz wrote: >I have run the following position on two chess programs - the Hiarcs 7 and the >REBEL 10. In my opinion, Bh2+ was the correct move versus Bxb2+. Hiarcs7 played >h2+ while REBEL 10 played Bxb2+. The time control was set at 40/2 for both and >both were left at their optimzed setting. I would be interested in the move your >program makes in the following position as well as any comments about the >correctness of either Bh2+ or Bxb2+. > >Set up the position as follows with black to move. > >White: Pawns at h3, f2, d5, c4, b2, and a2. > Knight at b5. > Bishops at h6 and d3. > Rooks at g1 and a1. > Queen at d1. > King at e1. > >Black: Pawns at g6, f7, d6, c5, b7, and a7. > Knights at h5 and c8. > Bishop at e5. > Rooks at e8 and a8. > Queen at d8. > King at g8. > >This was a game I played against another human. I played Bh2+ and eventually >won. I believe that Bxb2+ does not consider White's threats after Bxg6 with a >strong game for White. Hiarcs7 played Bh2+ which I firmly believe is correct. >Why REBEL 10 played Bxb2+ is something that bewilders me since its suppose to be >Grandmaster strength. Also, my dedicated chess computers - Mephisto Atlanta and >Novag Diamond 11 played Bxb2+. It should be noted here that I was able to defeat >both after that move. What does your software play? And do you agree that Bh2+ >is the proper move? > >Mel 1...Bh2+ [Fritz 5.32: 1...Bxb2+ 2.Kf1 Qh4 3.Qg4 Qxg4 4.hxg4 Ng3+ 5.Rxg3 Bxa1 6.Nc7] 2.Kf1 Bxg1 3.Kxg1 a6 4.Nc3 Qh4 5.Qg4 Qxg4+ 6.hxg4 Line +1.34/White 12 ply 32 megs hash tables depth=11 19/35 -1.58 1. ... Bxb2+ 2. Kf1 Bxa1 3. Qxh5 Re7 4. Bg5 Bg7 5. Bxe7 Nxe7 6. Qg5 a6 7. Na3 Nodes: 107541819 NPS: 57068 Time: 00:31:24.42 Crafty v. 16.6 w/WinBoard I like your estimate of Bxh2+. Regards, Phil
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