whywaita / poker-go

poker-go is a library for playing poker (NLH) in Go.

poker-go

poker-go is a library for playing poker in Go.

Usage

• Evaluate a hand: ./examples/eval_hand.go

package main

import (
	"fmt"
    "log"
	
    "github.com/whywaita/poker-go"
)

func main() {
	h1 := []poker.Card{
		{Rank: poker.RankAce, Suit: poker.Hearts},
		{Rank: poker.RankAce, Suit: poker.Diamonds},
	}
	p1 := poker.NewPlayer("player1", h1)

	board := []poker.Card{
		{Rank: poker.RankAce, Suit: poker.Clubs},
		{Rank: poker.RankAce, Suit: poker.Spades},
		{Rank: poker.RankKing, Suit: poker.Hearts},
		{Rank: poker.RankQueen, Suit: poker.Hearts},
		{Rank: poker.RankJack, Suit: poker.Hearts},
	}

	handtype, cards, err := poker.Evaluate(append(p1.Hand, board...))
	if err != nil {
		log.Fatalf("poker.Evaluate(append(%s. %s...)): %v", p1.Hand, board, err)
	}

	fmt.Printf("handtype: %s, cards: %s\n", handtype, cards)
}

$ go run eval_hand.go
handtype: Four of a Kind, cards: [{A hearts} {A diamonds} {A clubs} {A spades} {K hearts}]

• Calculate an equities for a given hands: ./examples/calc_equities.go

package main

import (
    "fmt"
    "log"

    "github.com/whywaita/poker-go"
)

func main() {
	h1 := []poker.Card{
		{Rank: poker.RankDeuce, Suit: poker.Hearts},
		{Rank: poker.RankThree, Suit: poker.Diamonds},
	}
	p1 := poker.NewPlayer("player1", h1)

	h2 := []poker.Card{
		{Rank: poker.RankAce, Suit: poker.Hearts},
		{Rank: poker.RankAce, Suit: poker.Diamonds},
	}
	p2 := poker.NewPlayer("player2", h2)

	h3 := []poker.Card{
		{Rank: poker.RankSeven, Suit: poker.Clubs},
		{Rank: poker.RankEight, Suit: poker.Clubs},
	}
	p3 := poker.NewPlayer("player3", h3)

	equities, err := poker.EvaluateEquity([]poker.Player{*p1, *p2, *p3})
	if err != nil {
		log.Fatalf("failed to evaluate equity: %v", err)
	}
	fmt.Printf("%v equity: %f, %v equity: %f, %v equity %f\n", h1, equities[0], h2, equities[1], h3, equities[2])
}

$ go run calc_equities.go
[{2 hearts} {3 diamonds}] equity: 0.085326, [{A hearts} {A diamonds}] equity: 0.663249, [{7 clubs} {8 clubs}] equity 0.251425

• Full documents are available at pkg.go.dev

LICENSE

MIT License

porting_made_hand.go and porting_precalculated_table.go is porting from axross/poker. Only these files are under Apache License 2.0 from the original works.