Author: Robert Hyatt
Date: 21:18:36 02/08/99
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On February 08, 1999 at 21:55:37, Jeremiah Penery wrote: >On February 08, 1999 at 21:31:42, Dann Corbit wrote: > >>Choose any time control you like and try to solve this tiny subset of the rock >>pile. I won't believe it without a pv and a ce, though. The challenge is won >>if you solve even a single row. >>(Requires "Missouri Proof" to win the challenge) >> >>b6n/kP3p1q/p2K1Pp1/P5Pp/7P/8/7B/8 w - -; bm b8=Q+; id "MES.1058" > >I put in this position in Crafty 16.5, and get the following shortly: > > 4. Bc5 Qg8 5. Bf8 Qxf8 > 17-> 4:38 0.00 1. b8=Q+ Kxb8 2. Kd7+ Ka7 3. Bg1+ Kb7 > 4. Bc5 Qg8 5. Bf8 Qxf8 >Internal deepening didn't find a move, ply=11, val=0 > 18 4:40 0.00 1. b8=Q+ Kxb8 2. Kd7+ Ka7 3. Bg1+ Kb7 > 4. Bc5 Qg8 5. Bf8 Qxf8 > 18-> 4:42 0.00 1. b8=Q+ Kxb8 2. Kd7+ Ka7 3. Bg1+ Kb7 > 4. Bc5 Qg8 5. Bf8 Qxf8 >Internal deepening didn't find a move, ply=11, val=0 > 19 4:48 0.00 1. b8=Q+ Kxb8 2. Kd7+ Ka7 3. Bg1+ Kb7 > 4. Bc5 Qg8 5. Bf8 Qxf8 > 19-> 4:51 0.00 1. b8=Q+ Kxb8 2. Kd7+ Ka7 3. Bg1+ Kb7 > 4. Bc5 Qg8 5. Bf8 Qxf8 >Internal deepening didn't find a move, ply=11, val=0 > 20 4:56 0.00 1. b8=Q+ Kxb8 2. Kd7+ Ka7 3. Bg1+ Kb7 > 4. Bc5 Qg8 5. Bf8 Qxf8 > 20-> 5:00 0.00 1. b8=Q+ Kxb8 2. Kd7+ Ka7 3. Bg1+ Kb7 > 4. Bc5 Qg8 5. Bf8 Qxf8 >Internal deepening didn't find a move, ply=11, val=0 > 21 5:08 0.00 1. b8=Q+ Kxb8 2. Kd7+ Ka7 3. Bg1+ Kb7 > 4. Bc5 Qg8 5. Bf8 Qxf8 > 21-> 5:14 0.00 1. b8=Q+ Kxb8 2. Kd7+ Ka7 3. Bg1+ Kb7 > 4. Bc5 Qg8 5. Bf8 Qxf8 >Internal deepening didn't find a move, ply=11, val=0 > 22 5:15 > >I'm not sure when exactly it picked the right move. >I don't know what those error(?) messages are, however. Bob, what's going on >here? > >Jeremiah Not really an error... I had seen this happen in a couple of traces I ran, and inserted the above message for testing. Turns out that what can happen is that I try 'internal iterative deepening' in a position where there is _no_ move to search such as when the side to move has been mated or drawn. It won't be in the next version. Ignore it..
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