63 lines
1.2 KiB
Go
63 lines
1.2 KiB
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"math/rand"
|
|
)
|
|
|
|
type symbols struct{ k, q, r, b, n rune }
|
|
|
|
var A = symbols{'K', 'Q', 'R', 'B', 'N'}
|
|
var W = symbols{'♔', '♕', '♖', '♗', '♘'}
|
|
var B = symbols{'♚', '♛', '♜', '♝', '♞'}
|
|
|
|
var krn = []string{
|
|
"nnrkr", "nrnkr", "nrknr", "nrkrn",
|
|
"rnnkr", "rnknr", "rnkrn",
|
|
"rknnr", "rknrn",
|
|
"rkrnn"}
|
|
|
|
func (sym symbols) chess960(id int) string {
|
|
var pos [8]rune
|
|
q, r := id/4, id%4
|
|
pos[r*2+1] = sym.b
|
|
q, r = q/4, q%4
|
|
pos[r*2] = sym.b
|
|
q, r = q/6, q%6
|
|
for i := 0; ; i++ {
|
|
if pos[i] != 0 {
|
|
continue
|
|
}
|
|
if r == 0 {
|
|
pos[i] = sym.q
|
|
break
|
|
}
|
|
r--
|
|
}
|
|
i := 0
|
|
for _, f := range krn[q] {
|
|
for pos[i] != 0 {
|
|
i++
|
|
}
|
|
switch f {
|
|
case 'k':
|
|
pos[i] = sym.k
|
|
case 'r':
|
|
pos[i] = sym.r
|
|
case 'n':
|
|
pos[i] = sym.n
|
|
}
|
|
}
|
|
return string(pos[:])
|
|
}
|
|
|
|
func main() {
|
|
fmt.Println(" ID Start position")
|
|
for _, id := range []int{0, 518, 959} {
|
|
fmt.Printf("%3d %s\n", id, A.chess960(id))
|
|
}
|
|
fmt.Println("\nRandom")
|
|
for i := 0; i < 5; i++ {
|
|
fmt.Println(W.chess960(rand.Intn(960)))
|
|
}
|
|
}
|