JS1k: The JavaScript code golfing competition

var d=document,e=d.body,h="childNodes",i="className";e.removeChild(e.children[0]);function j(a,b){var c=d.createElement(b);a.appendChild(c);return c}j(e,"style").innerHTML="h2{text-align:center}table{margin:auto}td{width:4px;height:4px;border:1px solid #444}td.b{!:#800}td.o{!:#00C}td:hover{!:#888}".replace(/!/g,"background");var k=j(e,"table"),l=j(e,"h2"),m=50,n=50,p=8,q=0;function r(){return Math.floor(Math.random()*m)}function s(a,b){for(var c=0;c<a;++c)b(c)}function t(){l.innerHTML=(p==0&&n>0?"LOSE.":p)+" : "+(n==0?"WIN!":n)}function u(a,b){x(a,b,-1,0);x(a,b,1,0);x(a,b,0,-1);x(a,b,0,1)}function x(a,b,c,v){++q;(function w(f,g){if(f<0||f>=m||g<0||g>=m){if(--q==0){--p;t()}}else{var o=k[h][g][h][f];if(o[i]=="o"){o[i]="";--n;t();--q;u(f,g,c,v)}else{o[i]="b";setTimeout(function(){o[i]="";c!=0?w(f+c,g):w(f,g+v)},25)}}})(a,b)}s(m,function(a){var b=j(k,"tr");s(m,function(c){j(b,"td").onclick=function(){p>0&&n>0&&q==0&&u(c,a)}})});s(n,function(){for(;;){var a=k[h][r()][h][r()];if(a[i]!="o"){a[i]="o";break}}});t()

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

var doc = document, body = doc.body, childNodes = 'childNodes', className = 'className';

body.removeChild(body.children[0]);

function appendTo(parent, tagName) {
  var child = doc.createElement(tagName);
  parent.appendChild(child);
  return child;
}

appendTo(body, 'style').innerHTML = 'h2{text-align:center}table{margin:auto}td{width:4px;height:4px;border:1px solid #444}td.b{!:#800}td.o{!:#00C}td:hover{!:#888}'.replace(/!/g, 'background');
var board = appendTo(body, 'table');
var counter = appendTo(body, 'h2');

var size = 50, pieces = 50, moves = 8, bullets = 0;

function random() {
  alert(0);
  return Math.floor(Math.random() * size);
}

function range(n, iterator) {
  for (var i = 0; i < n; ++i) iterator(i);
}

function updateStatus() {
  counter.innerHTML = (moves == 0 && pieces > 0 ? 'LOSE.' : moves) + ' : ' + (pieces == 0 ? 'WIN!' : pieces);
}

function fireBullets(x, y, dx, dy) {
  fireBullet(x, y, -1, 0);
  fireBullet(x, y, 1, 0);
  fireBullet(x, y, 0, -1);
  fireBullet(x, y, 0, 1);
}

function fireBullet(x, y, dx, dy) {
  ++bullets;

  (function moveBullet(x, y) {
    if (x < 0 || x >= size || y < 0 || y >= size) {
      if (--bullets == 0) {
        --moves; updateStatus();
      }
    } else {
      var cell = board[childNodes][y][childNodes][x];
      if (cell[className] == 'o') {
        cell[className] = '';
        --pieces; updateStatus();
        --bullets;
        fireBullets(x, y, dx, dy);
      } else {
        cell[className] = 'b';
        setTimeout(function () {
          cell[className] = '';
          if (dx != 0) moveBullet(x + dx, y);
          else moveBullet(x, y + dy);
        }, 25);
      }
    }
  }(x, y));
}

range(size, function (y) {
  var row = appendTo(board, 'tr');
  range(size, function (x) {
    appendTo(row, 'td').onclick = function () {
      if (moves > 0 && pieces > 0 && bullets == 0) fireBullets(x, y);
    };
  });
});

range(pieces, function () {
  for (;;) {
    var cell = board[childNodes][random()][childNodes][random()];
    if (cell[className] != 'o') {
      cell[className] = 'o';
      break;
    }
  }
});

updateStatus()