Replace piece bitboards to piece_type ones #23

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bruno · 2024-07-21T09:50:00+02:00

bruno commented

2024-07-21 09:50:00 +02:00

Instead of having 7 bitboards per color, use 7 bitboards + 2 per color.

For example, instead of:

bitboard_t bb[2][PT_NB];

We could have:

bitboard_t bb[PT_NB];
bitboard_t bb_col[2];

Issue: currently, bb[0] is for all pieces in the color. This one would be lost, except if indexes are shifted.

The point of doing so is everything could be flipped after each move (bitboards, board), so that move_gen, eval, etc... would be simplified (monochrome).

Instead of having 7 bitboards per color, use 7 bitboards + 2 per color. For example, instead of: ``` C bitboard_t bb[2][PT_NB]; ``` We could have: ``` C bitboard_t bb[PT_NB]; bitboard_t bb_col[2]; ``` Issue: currently, `bb[0]` is for all pieces in the color. This one would be lost, except if indexes are shifted. The point of doing so is everything could be flipped after each move (bitboards, board), so that move_gen, eval, etc... would be simplified (monochrome).

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label 2024-07-21 09:50:00 +02:00

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Reference: bruno/brchess#23