Goban

Library to play with a rusty "Goban" (name of the board where we play Go ! )

Use the version > 0.5.0 because in a bug detecting dead stones and in Ko detection Before 0.15.1 bug in the importation of SGF, player color was inverted

Channel : stable

Only contains move generation, and rules there is no IA, neither front-end.

Features:

• thread-safe // for using Arc instead of Rc for thread safety. Decrease perfs !
• history // each game will have his all history so you can iterate over it. Decrease perfs !

Thanks to some help in profiling and optimisation we can run a playout randomly of an entire game in 3 ms (i7u 3.0 Ghz) (before it was 600ms ) !

Example :

use crate::goban::rules::*;
use crate::goban::rules::game::*;
use rand::seq::IteratorRandom;

let mut g = Game::new(GobanSizes::Nine, Rule::Chinese);
let mut i = 35;
while !g.over() && i != 0 {
   g.play(
        // legals return an iterator on (x,y) points
       g.legals()
           .choose(&mut rand::thread_rng())
           .map(|point| Move::Play(point.0,point.1))
           .unwrap());
   i -= 1;
   println!("{}", g);
}

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○┼┼┼┼┼┼┼┨
┗┷┷┷┷┷┷┷┛


etc...

What works

• Capturing stones
• Playing
• Passing
• Resigning
• Implementation to count points
• Printing a pretty unicode Board on the terminal !
• SGF Import
• Generate legals moves (Handling Ko detection, Suicide moves, Super ko)
• Japanese Rules
• Chinese Rules
• Boards of different sizes (4x5 , 4x9) Limited to (19x19) (Due to Zobrist hashing) cas be easy increased in a fork.
• Experimental dead stones detection with MCTS rollouts.

Waiting for

• Const generics or maybe not (benchmark with a Goban with backed array is slightly faster)
• Into-Iter for arrays for removing arrayvec dep