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Oppai-rs

Logo

Oppai-rs (acronym for "OPen Points Artificial Intelligence") is an artificial intelligence for the game of points.

You can play with it using iced module.

Features

  • Two algorithms for searching the optimal move: UCT, Minimax.
  • Two implementations of Minimax search: PVS (a.k.a. NegaScout), MTD(f).
  • UCT tree reuse between moves.
  • Trajectories for moves pruning in the Minimax search tree.
  • Lock-free multi-threading for both Minimax and UCT.
  • Transposition table using Zobrist hashing for Minimax.
  • DFA-based patterns searching.
  • DSU to optimize capturing (behind a feature flag since it's good only for UCT).
  • Time-based and complexity-based calculations.
  • Generic ladders solver.

Running

Once you have rust installed on your system, compile with:

cargo build --release

Run with:

cargo run --release

or with:

./target/release/oppai-rs

If you are running the produced binary on the same CPU it was built on you might want to specify target-cpu flag:

RUSTFLAGS="-C target-cpu=native" \
  cargo build --release

Depending on your hardware it might increase the performance by up to 10%.

Testing

You can run test with:

cargo test

If you want to see log output during tests running you can use RUST_LOG environment variable:

RUST_LOG=debug cargo test

Also if you have nightly rust you can run benchmarks with:

cargo bench --features bench

Ideas

  • Fill debuts database.
  • Fill heuristics database.
  • Use patterns for UCT random games (see link).
  • Use patterns for Minimax best move prediction.
  • Complex estimating function for Minimax (see link)
  • Smart time control for UCT (see link).
  • Smart time control for Minimax.
  • Think on enemy's move.
  • Forbid typical losing ladders.
  • Split trajectories by groups for Minimax and solve them independently.

License

This project is licensed under AGPL version 3 or (at your option) any later version. See LICENSE.txt for details.

Copyright (C) 2015-2024 Kurnevsky Evgeny, Vasya Novikov