Skip to content

Simplify TB promo piece. #1068

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
protonspring wants to merge 2 commits into from
Closed

Simplify TB promo piece. #1068

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
fe5ce20
I break stuff. TB promo piece.
protonspring Jun 3, 2026
a15517b
Cargo formatting.
protonspring Jun 3, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
28 changes: 7 additions & 21 deletions src/types/moves.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,10 @@ impl Move {
Square::new(((self.0 >> 6) & 0b0011_1111) as u8)
}

pub const fn fromto(self) -> u16 {
self.0 & 0x0FFF
}

pub const fn kind(self) -> MoveKind {
unsafe { mem::transmute((self.0 >> 12) as u8) }
}
Expand Down Expand Up @@ -112,28 +116,10 @@ impl Move {
}

#[cfg(feature = "syzygy")]
pub const fn to_tb_move(self) -> crate::bindings::TbMove {
const fn promo_bits(pt: PieceType) -> crate::bindings::TbMove {
match pt {
PieceType::Queen => 1,
PieceType::Rook => 2,
PieceType::Bishop => 3,
PieceType::Knight => 4,
_ => unreachable!(),
}
}
pub fn to_tb_move(self) -> crate::bindings::TbMove {
let promo_pt = if self.is_promotion() { PieceType::King as u16 - self.promo_piece_type() as u16 } else { 0 };

let from = self.from() as u16;
let to = self.to() as u16;

let base = (from << 6) | to;

if self.is_promotion() {
let promo = promo_bits(self.promo_piece_type()) & 0x7;
base | (promo << 12)
} else {
base
}
self.fromto() | (promo_pt << 12)
}

pub fn to_uci(self, board: &Board) -> String {
Expand Down
Loading