Generate Chess960 starting position: Difference between revisions

=={{header|C#}}==

{{trans|Go}}

<syntaxhighlight lang="C#">

using System;

class Program

{

struct Symbols

{

public char K, Q, R, B, N;

public Symbols(char k, char q, char r, char b, char n)

{

K = k; Q = q; R = r; B = b; N = n;

}

}

private static Symbols A = new Symbols('K', 'Q', 'R', 'B', 'N');

private static Symbols W = new Symbols('♔', '♕', '♖', '♗', '♘');

private static Symbols B = new Symbols('♚', '♛', '♜', '♝', '♞');

private static string[] krn = new string[]

{

"nnrkr", "nrnkr", "nrknr", "nrkrn",

"rnnkr", "rnknr", "rnkrn",

"rknnr", "rknrn",

"rkrnn"

};

private static string Chess960(Symbols sym, int id)

{

char[] pos = new char[8];

int q = id / 4, r = id % 4;

pos[r * 2 + 1] = sym.B;

r = q % 4; q /= 4;

pos[r * 2] = sym.B;

r = q % 6; q /= 6;

int placementIndex = 0; // Adjusted variable name to prevent conflict

for (int i = 0; ; i++)

{

if (pos[i] != '\0') continue;

if (r == 0)

{

pos[i] = sym.Q;

break;

}

r--;

}

while (pos[placementIndex] != '\0') placementIndex++; // Adjusted loop to prevent conflict

foreach (char f in krn[q])

{

while (pos[placementIndex] != '\0') placementIndex++;

switch (f)

{

case 'k':

pos[placementIndex] = sym.K;

break;

case 'r':

pos[placementIndex] = sym.R;

break;

case 'n':

pos[placementIndex] = sym.N;

break;

}

}

return new string(pos);

}

static void Main(string[] args)

{

Console.WriteLine(" ID Start position");

foreach (int id in new int[] { 0, 518, 959 })

{

Console.WriteLine($"{id,3} {Chess960(A, id)}");

}

Console.WriteLine("\nRandom");

Random rand = new Random();

for (int i = 0; i < 5; i++)

{

Console.WriteLine(Chess960(W, rand.Next(960)));

}

}

}

</syntaxhighlight>

{{out}}

<pre>

ID Start position

0 BBQNNRKR

518 RNBQKBNR

959 RKRNNQBB

Random

♘♕♖♔♗♖♘♗

♗♗♖♘♔♖♕♘

♖♕♘♔♖♗♗♘

♘♖♗♔♘♗♖♕

♖♘♕♗♔♘♗♖

</pre>