Add info to the uci client (#11)

- Added "info" to uci client which currently includes depth, nodes, score cp, time, pv.
- Removed "debug" and "stable" options because they are currently useless. Debug info is in also uci's info now so no reason to have it.

README.md

@@ -49,10 +49,6 @@ There are several configurations for Catto that you can change in `catto.config.
 module.exports = {
     // Search depth
     searchDepth: 4,
-    // Set to true to turn on debug mode, will log out useful info
-    debug: false,
-    // If you disable stable mode, features that are in-dev and might cause issues will be turned on
-    stable: true,
     // The starting position represented as a FEN string
     fen: "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
     // Current version to show in UCI

catto.config.js

@@ -1,14 +1,10 @@
 module.exports = {
     // Search depth
     searchDepth: 4,
-    // Set to true to turn on debug mode, will log out useful info
-    debug: false,
-    // If you disable stable mode, features that are in-dev and might cause issues will be turned on
-    stable: true,
     // The starting position represented as a FEN string
     fen: "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
     // Current version to show in UCI
-    version: "v0.6.0",
+    version: "v0.6.1",
     // Late move reduction config
     lmrFullDepth: 4, // Number of moves to be searched in full depth
     lmrMaxReduction: 3, // Only apply LMR above this depth

package.json

@@ -1,6 +1,6 @@
 {
   "name": "catto",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "description": "The Catto chess engine",
   "main": "index.js",
   "scripts": {

src/core.ts

@@ -36,8 +36,6 @@ export interface HistoryMove {
 export class Engine {
     public chess: Chess;
     public fen: string;
-    public debug: boolean;
-    public stable: boolean;
     public searchDepth: number;
     public nodes: number = 0;
     public lmrMaxReduction: number;
@@ -57,16 +55,19 @@ export class Engine {
         "w": [ {}, {}, {}, {}, {}, {} ]
     }
 
+    // PV table
+    public pvTable: string[];
+
     constructor(options: EngineOptions) {
         this.fen = options.fen;
-        this.debug = options.debug;
         this.searchDepth = options.searchDepth;
         this.chess = new Chess(this.fen);
         this.uci = options.uci;
-        this.stable = options.stable;
         this.lmrMaxReduction = options.lmrMaxReduction;
         this.lmrFullDepth = options.lmrFullDepth;
         this.maxExtensions = options.maxExtensions;
+
+        this.pvTable = new Array(this.searchDepth).fill("");
     }
 
     // Tranposition table
@@ -384,6 +385,9 @@ export class Engine {
                 if (this.ply === 0) {
                     this.bestMove = move;
                 }
+
+                // Store pv move
+                this.pvTable[this.ply] = move.lan;
             }
         }
 
@@ -393,16 +397,25 @@ export class Engine {
         return alpha;
     }
 
-    findMove() {
+    findMove(): {
+        bestMove: Move | undefined;
+        time: number;
+        depth: number;
+        nodes: number;
+        pvTable: string[];
+        evaluation: number;
+    } {
         const start = Date.now();
 
-        this.negamax(this.searchDepth, -50000, 50000, 0);
+        const evaluation = this.negamax(this.searchDepth, -50000, 50000, 0);
 
-        if (this.debug) {
-            console.log("Nodes searched:", this.nodes);
-            console.log(`Finished in: ${Date.now() - start}ms`); 
+        return {
+            bestMove: this.bestMove,
+            time: Date.now() - start,
+            depth: this.searchDepth,
+            nodes: this.nodes,
+            pvTable: this.pvTable,
+            evaluation
         };
-
-        return this.bestMove;
     }
 }

src/uci.ts

@@ -71,15 +71,12 @@ export class UCI {
                 }
             }
         }
-        // console.log(this.engine.chess.ascii());
     }
 
     handleGo(command: string) { // To be updated
-        // const start = Date.now();
-        const bestMove = this.engine.findMove();
+        const result = this.engine.findMove();
 
-        console.log(`bestmove ${bestMove?.lan}`);
-        // console.log(this.engine.nodes);
-        // console.log(Date.now() - start);
+        console.log(`info depth ${result.depth} score cp ${Math.round(result.evaluation)} time ${result.time} nodes ${result.nodes} pv ${result.pvTable.join(" ")}`);
+        console.log(`bestmove ${result.bestMove?.lan}`);
     }
 }