Titanium Engine

Rust search engine for an abstract wall-blocking board game: iterative-deepening αβ, CAT corridor pruning, ACE v11 eval, UCI protocol, and WASM bindings.

Repo: github.com/titaniummachine1/titanium-engine

Related repos:

Repo	Purpose
Titanium-Website	Playable UI, benchmarks, vendored JS engines
Titanium-Coordinator	Cloudflare Worker for distributed SPRT testing
titanium-test-client	CLI worker that runs matches against the coordinator

Build & test

cargo test --release
cargo build --release
cargo run --release --bin titanium -- perft 3    # → 2_062_264 nodes
cargo run --release --bin titanium -- perft 4    # → 247_569_030 nodes (stress)
cargo run --release --bin titanium -- bench 3 10 # honest movegen+make/unmake nps
cargo run --release --bin titanium -- uci        # UCI loop

WASM (install once: cargo install wasm-pack):

wasm-pack build --release --no-default-features --features wasm

Move generation

Production movegen is single-thread shift algebra (no wall tables, no movegen GPU/threads):

• Walls: L1 empty → L2 collision shifts → TOPO flood-skip → L3 parallel flood + bit theft
• Pawns: ShiftCanStep default (PawnGenMode in movegen/legal.rs)

Full reference: docs/MOVEGEN.md
Handoff for follow-up work: docs/MOVEGEN-HANDOFF.md

Regenerate the offline pawn O(1) tables (PawnGenMode::O1Lookup is the production default — perft-proven fastest):

cargo run --release --bin movegen-o1-gen

Documentation

Doc	Content
docs/MOVEGEN.md	Production movegen architecture
docs/MOVEGEN-HANDOFF.md	Next work for audit / make-unmake / L3
docs/STATE.md	Session handoff (search, eval)
docs/video/README.md	Episode index
docs/video/PERFT-BENCHMARKS.md	Perft gates + timings

License

GPL-3.0-or-later — same license family as Stockfish. Copyleft applies when binaries or combined works are distributed; hosting as a service without distribution is not covered by GPL (unlike AGPL). See LICENSE.