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lazy move generation

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This commit is contained in:
Moritz 2025-11-20 00:19:35 +01:00
parent a93bfe258c
commit a127815cad
11 changed files with 132 additions and 75 deletions
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18
benches/perft.rs
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@ -1,19 +1,18 @@
use chess_engine::board::Board;
use chess_engine::movegen::generate_pseudo_legal_moves;
use chess_engine::movegen::picker::MoveGenerator;
use chess_engine::movegen::legal_check::is_other_king_attacked;
use chess_engine::r#move::MoveList;
use criterion::{criterion_group, criterion_main, Criterion};
use chess_engine::zobrist::init_zobrist;
fn count_legal_moves_recursive(board: &mut Board, depth: u8) -> u64 {
if depth == 0 {
return 1_u64;
}
let mut list = MoveList::new();
generate_pseudo_legal_moves(&board, &mut list);
let mut generator = MoveGenerator::new();
let mut leaf_nodes = 0_u64;
for mv in list.iter() {
let undo_info = board.make_move(*mv);
while let Some(mv) = generator.next(board) {
let undo_info = board.make_move(mv);
if !is_other_king_attacked(board) {
leaf_nodes += count_legal_moves_recursive(board, depth - 1);
}
@ -22,9 +21,8 @@ fn count_legal_moves_recursive(board: &mut Board, depth: u8) -> u64 {
leaf_nodes
}
fn run_perft_benchmark(c: &mut Criterion) {
init_zobrist();
// init_zobrist() is no longer needed
let mut board = Board::from_fen("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");
c.bench_function("standard_perft5", |b| {
@ -35,4 +33,4 @@ fn run_perft_benchmark(c: &mut Criterion) {
}
criterion_group!(benches, run_perft_benchmark);
criterion_main!(benches);
criterion_main!(benches);