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1  Game Development / Performance Tuning / Re: Bitboard for othello on: 2010-12-11 12:49:06
@ jono thanks ill try that

i think the increase in performance is mostly due to faster copying of the boards and faster move generation which allows greater search depth
currently i have to manually copy all the values in one board representation into a new 2d array cause the .clone() method does not clone the array in the board representation
sry if it wasnt clear by 8x8 i was referring to a 2d-int array with length 8
 thats what im currently using although black is -1 cause its easier to get the enemy color.

2  Game Development / Performance Tuning / Bitboard for othello on: 2010-12-11 00:25:42
im currently working on an ai for othello/reversi im using alpha/beta search without move ordering for searching the game tree.
Currently im using an 8x8 int array as board representation. But i want to use a Bitboard to make copying the boards easier. The board will contain 2 long variables 1 for the white stones, one for te black stones.
Somehow i cant come up with an efficient way of calculating the possible moves for a given state. Of course i can check the empy fields adjacent to discs and verify if the field is valid through extending a bitmask in every direction.
But i think this is slower than the int representation.
Anyone has some good ideads?

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