Stockfish v stockfish and beginnings of minimax

go.mod

@@ -0,0 +1,5 @@
+module github.com/jameshochadel/chess-bot
+
+go 1.15
+
+require github.com/notnil/chess v1.5.0

go.sum

@@ -0,0 +1,3 @@
+github.com/ajstarks/svgo v0.0.0-20200320125537-f189e35d30ca/go.mod h1:K08gAheRH3/J6wwsYMMT4xOr94bZjxIelGM0+d/wbFw=
+github.com/notnil/chess v1.5.0 h1:BcdmSGqZYhoqHsAqNpVTtPwRMOA4Sj8iZY1ZuPW4Umg=
+github.com/notnil/chess v1.5.0/go.mod h1:cRuJUIBFq9Xki05TWHJxHYkC+fFpq45IWwk94DdlCrA=

main.go

@@ -0,0 +1,71 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/notnil/chess"
+	"github.com/notnil/chess/uci"
+)
+
+func main() {
+	eng, err := uci.New("stockfish")
+	if err != nil {
+		panic(err)
+	}
+	defer eng.Close()
+
+	if err := eng.Run(uci.CmdUCI, uci.CmdIsReady, uci.CmdUCINewGame); err != nil {
+		panic(err)
+	}
+
+	game := chess.NewGame()
+	for game.Outcome() == chess.NoOutcome {
+		cmdPos := uci.CmdPosition{Position: game.Position()}
+		cmdGo := uci.CmdGo{MoveTime: time.Second / 100}
+		if err = eng.Run(cmdPos, cmdGo); err != nil {
+			panic(err)
+		}
+		move := eng.SearchResults().BestMove
+		if err := game.Move(move); err != nil {
+			panic(err)
+		}
+	}
+
+	fmt.Println(game.String())
+}
+
+func minimax(pos chess.Position, depth int, maxPlayer bool) (bestMove chess.Move, posValue float32) {
+	/*
+	if depth == 0 or len(game.ValidMoves) == 0,
+		return evaluatePosition(pos)
+	if maxPlayer {
+
+	} else {
+
+	}
+	*/
+	return chess.Move{}, 0
+}
+
+var pieceVals = map[string]float32 {
+	"p": 1,
+	"n": 3,
+	"b": 3,
+	"r": 6,
+	"q": 9,
+}
+
+func evaluatePosition(pos chess.Position) float32 {
+	str := pos.String()
+
+	var acc float32
+
+	for piece, value := range pieceVals {
+		acc += float32(strings.Count(str, piece)) * value
+	}
+	strings.Count(str, "q")
+	// count number of each piece
+	return 0.0
+}