Author: David Dahlem
Date: 06:36:05 02/23/06
Go up one level in this thread
On February 23, 2006 at 09:10:47, Charles Roberson wrote: > > Since I see others (Stuart) working on perft, I'll release a position that > is helping me find a bug. > > 7k/8/8/8/1p6/8/PP6/6K w - - 0 0 > > Here are the results > Depth Hand Calculation Telepath > 1 6 6 > 2 31 31 > 3 319 1288 > > Either my hand calculations are wrong or Telepath has a bug in the > EP code. The numbers represent the sum of all the nodes in the tree for that > depth. Thus, the 6 root nodes are counted in the 2 ply and 3 ply counts. > > Given that some do not count the nodes that way subtraction should do the > trick with the depth counts being 6, 25 and 287 respectively. > > I'd like to see somebody post perft results on this position for as many > depths as possible assuming they think their engine produces correct >results. Here is what my engine gets to perft 9 ... Perft: Depth (1) = 8 Time = 0.000 Perft: Depth (2) = 33 Time = 0.000 Perft: Depth (3) = 270 Time = 0.000 Perft: Depth (4) = 1664 Time = 0.002 Perft: Depth (5) = 13931 Time = 0.020 Perft: Depth (6) = 94162 Time = 0.648 Perft: Depth (7) = 793785 Time = 0.719 Perft: Depth (8) = 5681152 Time = 5.618 Perft: Depth (9) = 47559506 Time = 43.309 Regards Dave
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