World Draughts Forum

Very Clear

Thx

gerard,

is it possible to capture two different sets of pieces that have the same size with a draught (avec un pion) from the same initial square to the same final square ?

Rein proved (with previous diagram) that it is possible with a king

Pascal

Hi Rein,

Very clear.

is it possible to capture two different sets of pieces that have the same size with a draught ?

Pascal

Gérard, I 'd like to refine my question : In my move generator recursive procedure, after calculating a move, I check if it's a duplicate move. To do that, i check if a previous move was find with same "initial square" and same "final square" and same captured count. Is it correct or may I also chec...

Ed, I tried your postion and results are : perft : 1 Nodes : 14 perft : 2 Nodes : 55 perft : 3 Nodes : 1168 perft : 4 Nodes : 5432 perft : 5 Nodes : 87195 perft : 6 Nodes : 629010 perft : 7 Nodes : 9041010 perft : 8 Nodes : 86724219 perft : 9 Nodes : 1216917193 Is it correct ? Pascal

Ed,

I try to remove duplicates move but it sounds not good.

For a position, duplicate moves are moves with same "initial square" and same "end square".

is it true ?

if not, could you give me an example please.

Pascal

Gerard,

I have fix the bug !

The issue was in make procedure in case of loop (ie 22x22).
Thank you very much for your help.

Pascal

Gerard, you are right, 7 is the nodes for perft 2 After 25-20 24-15 33-29 18-22 29x20 22x22 Perft2 20-14 nodes 1 Perft2 30-25 nodes 1 Perft2 30-24 nodes 1 Perft2 32-28 nodes 1 Perft2 32-27 nodes 2 Perft2 34-29 nodes 1 perft2 sum 7 (instead of 9) Have a good night Pascal

Hi gerard

After 25-20 24-15 33-29 18-22 29x20

next is 22x22 with 7 nodes

maybe 22x22 is not allowed then correct are 22x31 and 22x33

do you confirm ?

Sorry if you have spend a lot of time but i am a beginner !

Thx

Pascal

Hi Gerard, One step again : after 25-20 24-15 33-29 Perft5 12-17 nodes 159 Perft5 14-20 nodes 113 Perft5 15-20 nodes 119 Perft5 18-22 nodes 25 Perft5 19-24 nodes 34 Perft5 26-31 nodes 31 perft5 sum 481 (instead of 483 !) Thx for your help ! Je suis à la limite de la crise de nerf ! Pascal

Thank you Ed, I need your help again ! My output after 25-20 : perft : 1 Nodes : 2 perft : 2 Nodes : 12 perft : 3 Nodes : 34 perft : 4 Nodes : 100 perft : 5 Nodes : 301 perft : 6 Nodes : 955 perft : 7 Nodes : 2825 (instead of 2827 !) by ply : Perft7 14-25 nodes 319 Perft7 24-15 nodes 2506 perft7 sum...

Hi, I try my move generator and something is wrong for woldouby position : perft : 1 Nodes : 6 perft : 2 Nodes : 12 perft : 3 Nodes : 30 perft : 4 Nodes : 73 perft : 5 Nodes : 215 perft : 6 Nodes : 590 perft : 7 Nodes : 1944 perft : 8 Nodes : 6267 for perft8, I obtain 6267 instead of 6269 by ply : P...