Author: Daniel Shawul
Date: 23:41:51 11/11/04
Go up one level in this thread
On November 11, 2004 at 10:48:39, Anthony Cozzie wrote:
>On November 11, 2004 at 09:30:05, Daniel Shawul wrote:
>
>>Today i finished organizing my BOARD class , and collecting some global
>>variables so that i can make a copy of a board easily. Problem is
>>I use 0x88 and piecelists which need huge for loops to copy. BITBOARDs look
>>easier. Is this too much of a problem? I am saying this because i think i have
>>to make a copy of the board each time a node is split.
>>daniel
>
>(from you-go-girl thread)
>1. Nf3xe5[S] Qd8-e7 2. Bf5-e4[S] d6xe5[S] 3. Be4xb7[S] Nf4xe2 4. Ke1xe2[S]
>Qe7xb7[S] 5. Qc3xe5[S] f7-f6[S] 6. Qe5-e6 Rf8-f7 7. b4xc5 b6xc5 8. Bb2xf6 Nb8-c6
>9. Qe6-d5 Ra8-e8 10. Ke2-f1[S] Nc6-d4 11. Qd5xb7 Rf7xb7 12. Bf6xd4
> = (1.15) Depth: 14/43 00:08:30.99 609709kN (1193 KN/s, 4649 splits, 459 aborts)
>
>Note that the program split only 5000 times in 8 minutes.
>
>I am with Bob on this one; split overhead is important but not THAT important.
>
>anthony
Copying Board is relatively easier as compared to copying some other
stuff that should be copied.
SEARCH_THREAD
{
BOARD
move[250]
score[250]
History[400] //all moves of a game
SEARCH_INFO
SEARCH_COUNTS
Killers
etc..
}
After doing all that, i finally manged to make a copy of
a search_trade that can run independently! my search_trades
share only hashtables (main tt,pawn tt,eval tt,history_table).
And then i tried splitting the first root move
if(move_count == 0)
{
copyThrade = Copy search trade
-search(copyThrade,....)
copy back results
}
else
continue normally
This worked fine. but the problem is doing only one split at the node
already decreased the nps by 10,000?? Am I copying some unnecessary stuff
or is this expected?
best
daniel
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