Author: blass uri
Date: 15:29:05 03/04/99
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On March 04, 1999 at 11:48:36, Robert Hyatt wrote: >On March 04, 1999 at 11:00:46, Randy Lovelace wrote: > >>In this position La Dame Blanche played h4!! in only 5 sec >>Rebel 10c cant find this move after 10min on my machine >>This was a game played by my program RLchess once again a passed >>pawn kills me >>4bR2/4P3/1np3pk/1p2B3/p3R3/8/2q3PP/7K w - - bm h4!!;id Ldb-RLchess; >>Randy Lovelace > > >You must have set the position up wrong. I ran this on crafty and got >the following: > > 6 0.27 0.46 1. Ref4 Qc1+ 2. Rf1 Qxf1+ 3. Rxf1 Nc4 > 4. Bh8 Nd6 5. Be5 Ne4 > 6 0.66 ++ 1. h4!! > 6-> 0.70 0.85 1. h4 > 7 0.98 ++ 1. h4!! > 7 2.11 3.45 1. h4 Qb1+ 2. Kh2 g5 3. Rxe8 Qxe4 4. > Rh8+ Kg6 5. e8=Q+ Kf5 6. Qf7+ Kxe5 > 7. Re8+ Kd4 8. Rxe4+ Kxe4 9. hxg5 > 7-> 2.43 3.45 1. h4 Qb1+ 2. Kh2 g5 3. Rxe8 Qxe4 4. > Rh8+ Kg6 5. e8=Q+ Kf5 6. Qf7+ Kxe5 > 7. Re8+ Kd4 8. Rxe4+ Kxe4 9. hxg5 > 8 3.25 ++ 1. h4!! > 8 6.18 7.19 1. h4 g5 2. Rxe8 Kg6 3. Rf8 Qd1+ 4. > Kh2 Qd7 5. e8=Q+ Qxe8 6. Rxe8 > 8-> 6.87 7.19 1. h4 g5 2. Rxe8 Kg6 3. Rf8 Qd1+ 4. > Kh2 Qd7 5. e8=Q+ Qxe8 6. Rxe8 > 9 8.78 7.19 1. h4 g5 2. Rxe8 Kg6 3. Rf8 Qd1+ 4. > Kh2 Qd7 5. e8=Q+ Qxe8 6. Rxe8 > 9-> 10.34 7.19 1. h4 g5 2. Rxe8 Kg6 3. Rf8 Qd1+ 4. > Kh2 Qd7 5. e8=Q+ Qxe8 6. Rxe8 > 10 16.98 7.14 1. h4 g5 2. Rxe8 Qd1+ 3. Kh2 Qd7 4. > Rh8+ Kg6 5. Bg3 gxh4 6. Bxh4 Nc4 7. > Rg8+ Kf5 8. e8=Q Qxe8 9. Rgxe8 > >I can't imagine a program like Rebel not finding that. I can imagine that there is a bug that Rebel10C can never find some simple moves in some rare cases because I found similiar problems with other programs. I know that there are rare cases when Junior5 can never find simple moves(other computers have no problem to find and I am not talking about underpromotions). Fortunately this cases are rare enough so Junior is a good program. I know from analyzing studies that there is a bug in Genius3(this program can go to an infinite loop and lose on time). I also found that I cannot be sure that the program is correct when it say mate. These cases are rare and almost never happen in games. Uri
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