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package main
import (
"fmt"
"github.com/notnil/chess"
"github.com/notnil/chess/uci"
"math"
)
// stolen^H^H inspired from lichess https://github.com/ornicar/lila/blob/master/modules/analyse/src/main/Advice.scala#L79
func WinningChance(cp int) float64 {
winning_chance := 2 / (1 + math.Exp(-0.004 * float64(cp))) - 1
return winning_chance
}
func main() {
engine, err := uci.New("stockfish")
if err != nil {
panic(err)
}
defer engine.Close()
if err := engine.Run(uci.CmdUCI, uci.CmdIsReady, uci.CmdUCINewGame); err != nil {
panic(err)
}
game := chess.NewGame()
prevprev_winning_chance := 0.0
prev_winning_chance := 0.0
for game.Outcome() == chess.NoOutcome {
if err := engine.Run(uci.CmdPosition{Position: game.Position()}, uci.CmdGo{Depth: 12}); err != nil {
panic(err)
}
search_results := engine.SearchResults()
cp := search_results.Info.Score.CP
winning_chance := WinningChance(cp)
num_of_moves := len(game.Moves())
if (num_of_moves > 0) {
delta := prevprev_winning_chance - winning_chance
if (num_of_moves % 2 == 0) {
delta *= -1;
}
if delta > 0.3 {
fmt.Print("B-b-b-blunder!!")
} else if delta > 0.2 {
fmt.Print("That was a mistake.")
} else if delta > 0.1 {
fmt.Print("Meh...")
} else {
fmt.Print("Ok")
}
fmt.Printf(" (%0.2f)\n", -delta)
}
prevprev_winning_chance = prev_winning_chance
prev_winning_chance = winning_chance
fmt.Println(game.Position().Board().Draw())
fmt.Println("Score (centipawns):", cp, "Winning chance:", winning_chance, "Best Move: ", search_results.BestMove)
fmt.Println("Move: ", search_results.BestMove)
if err := game.Move(search_results.BestMove); err != nil {
panic(err)
}
// for {
// var move string
// fmt.Print("Move: ")
// fmt.Scanln(&move)
// if err := game.MoveStr(move); err == nil {
// break
// }
// fmt.Println("Illegal move!")
// }
}
fmt.Println(game.Outcome())
fmt.Println(game.Position().Board().Draw())
}