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    <title>Online Chess - Level Advanced</title>
    <meta name="description" content="Test your chess game skills with the world&#39;s smallest chess program. Game level: Advanced.">
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    <script src="./Online Chess - Level Advanced_files/ca-pub-1415407386988961.js.ladda ned"></script>
    <script>
        // aliases and constants
        function $(i) {
            return document.getElementById(i)
        }
        String.prototype.U = String.prototype.charCodeAt;
        M = Math.random;
        W = setTimeout;
        X = 10;
        Q = 15;
        H = 1e4


        // 2K chess (1683 bytes)
        b = 0;
        I = [];
        G = 120;
        l = [5, 3, 4, 6, 2, 4, 3, 5, 1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 9, 9, 9, 13, 11, 12, 14, 10, 12, 11, 13, 0, 99, 0, 306, 297, 495, 846, -1, 0, 1, 2, 2, 1, 0, -1, -1, 1, -10, 10, -11, -9, 9, 11, 10, 20, -9, -11, -10, -20, -21, -19, -12, -8, 8, 12, 19, 21];

        function P(w, c, h, e, S, s) {
            var t, o, L, E, d, O = e,
                N = -H * H,
                K = 78 - h << X,
                p, g, n, m, A, q, r, C, J, a = y ? -X : X;
            y ^= 8;
            G++;
            d = w || s && s >= h && P(0, 0, 0, 21, 0, 0) > H;
            do {
                if (o = I[p = O]) {
                    q = o & Q ^ y;
                    if (q < 7) {
                        A = q-- & 2 ? 8 : 4;
                        C = o - 9 & Q ? [53, 47, 61, 51, 47, 47][q] : 57;
                        do {
                            r = I[p += l[C]];
                            if (!w | p == w) {
                                g = q | p + a - S ? 0 : S;
                                if (!r & (!!q | A < 3 || !!g) || (r + 1 & Q ^ y) > 9 && q | A > 2) {
                                    if (m = !(r - 2 & 7)) return y ^= 8, I[G--] = O, K;
                                    J = n = o & Q;
                                    E = I[p - a] & Q;
                                    t = q | E - 7 ? n : (n += 2, 6 ^ y);
                                    while (n <= t) {
                                        L = r ? l[r & 7 | 32] - h - q : 0;
                                        if (s) L += (1 - q ? l[(p - p % X) / X + 37] - l[(O - O % X) / X + 37] + l[p % X + 38] * (q ? 1 : 2) - l[O % X + 38] + (o & 16) / 2 : !!m * 9) + (!q ? !(I[p - 1] ^ n) + !(I[p + 1] ^ n) + l[n & 7 | 32] - 99 + !!g * 99 + (A < 2) : 0) + !(E ^ y ^ 9);
                                        if (s > h || 1 < s & s == h && L > Q | d) {
                                            I[p] = n, I[O] = m ? (I[g] = I[m], I[m] = 0) : g ? I[g] = 0 : 0;
                                            L -= P(s > h | d ? 0 : p, L - N, h + 1, I[G + 1], J = q | A > 1 ? 0 : p, s);
                                            if (!(h || s - 1 | B - O | i - n | p - b | L < -H)) return F(), G--, u = J;
                                            J = q - 1 | A < 7 || m || !s | d | r | o < Q || P(0, 0, 0, 21, 0, 0) > H;
                                            I[O] = o;
                                            I[p] = r;
                                            m ? (I[m] = I[g], I[g] = 0) : g ? I[g] = 9 ^ y : 0
                                        }
                                        if (L > N || s > 1 && L == N && !h && M() < .5) {
                                            I[G] = O;
                                            if (s > 1) {
                                                if (h && c - L < 0) return y ^= 8, G--, L;
                                                if (!h) i = n, B = O, b = p
                                            }
                                            N = L
                                        }
                                        n += J || (g = p, m = p < O ? g - 3 : g + 2, I[m] < Q | I[m + O - p] || I[p += p - O]) ? 1 : 0
                                    }
                                }
                            }
                        } while (!r & q > 2 || (p = O, q | A > 2 | o > Q & !r && ++C * --A))
                    }
                }
            } while (++O > 98 ? O = 20 : e - O);
            return y ^= 8, G--, N + H * H && N > -K + 1924 | d ? N : 0
        }
        B = i = y = u = 0;
        while (B++ < 120) I[B - 1] = B % X ? B / X % X < 2 | B % X < 2 ? 7 : B / X & 4 ? 0 : l[i++] | 16 : 7;

        function F() {
            B = b;
            for (p = 21; p < 99; ++p)
                if (q = $(p)) {
                    q.innerHTML = "\xa0\u265f\u265a\u265e\u265d\u265c\u265b  \u2659\u2654\u2658\u2657\u2656\u2655".charAt(I[p] & Q);
                    q.lang = p - B
                }
        }
        F();

        function V(s) {
            i = (I[s] ^ y) & Q;
            if (i > 8) {
                b = s;
                F()
            } else if (B && i < 9) {
                b = s;
                i = I[B] & Q;
                if ((i & 7) == 1 & (b < 29 | b > 90)) i = 14 ^ y;
                P(0, 0, 0, 21, u, 1);
                if (y) W("P(0,0,0,21,u,3),P(0,0,0,21,u,1)", 250)
            }
        }
    </script>

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            text-align: center
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            position: relative;
            box-sizing: border-box;
            max-width: 38em;
            margin: 0 auto;
            padding: 1px 0 3em
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        p#menu {
            margin: .4em 0;
            font: 1.75em cambria;
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            display: inline-block;
            padding: .2em .5em;
            white-space: nowrap
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        p span {
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        a {
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        a:hover {
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        div#info {
            padding: 0 .5em;
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        table {
            margin: 0 auto 1em
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        td {
            width: 1.04em;
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            font: 3em/1 "MS Gothic", "Segoe UI Symbol", "DejaVu Sans";
            background: Beige
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        tr:nth-child(odd) td:nth-child(even),
        tr:nth-child(even) td:nth-child(odd) {
            background: Tan
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        table {
            margin-top: .5em
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        td {
            font-size: 4em;
            cursor: pointer
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        td[lang='0'] {
            outline: thin solid #a00;
            color: #800
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            top: .5em;
            width: 160px;
            height: 600px
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        .side_ads.left {
            left: -180px
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            right: -180px
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                box-shadow: .05em .05em .1em #666
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    </style>

</head>

<body>

    <table>
        <tbody>
            <tr>
                <td onclick="V(21)" id="21">♜</td>
                <td onclick="V(22)" id="22">♞</td>
                <td onclick="V(23)" id="23">♝</td>
                <td onclick="V(24)" id="24">♛</td>
                <td onclick="V(25)" id="25">♚</td>
                <td onclick="V(26)" id="26">♝</td>
                <td onclick="V(27)" id="27">♞</td>
                <td onclick="V(28)" id="28">♜</td>
            </tr>
            <tr>
                <td onclick="V(31)" id="31">♟</td>
                <td onclick="V(32)" id="32">♟</td>
                <td onclick="V(33)" id="33">♟</td>
                <td onclick="V(34)" id="34">♟</td>
                <td onclick="V(35)" id="35">♟</td>
                <td onclick="V(36)" id="36">♟</td>
                <td onclick="V(37)" id="37">♟</td>
                <td onclick="V(38)" id="38">♟</td>
            </tr>
            <tr>
                <td onclick="V(41)" id="41"></td>
                <td onclick="V(42)" id="42"></td>
                <td onclick="V(43)" id="43"></td>
                <td onclick="V(44)" id="44"></td>
                <td onclick="V(45)" id="45"></td>
                <td onclick="V(46)" id="46"></td>
                <td onclick="V(47)" id="47"></td>
                <td onclick="V(48)" id="48"></td>
            </tr>
            <tr>
                <td onclick="V(51)" id="51"></td>
                <td onclick="V(52)" id="52"></td>
                <td onclick="V(53)" id="53"></td>
                <td onclick="V(54)" id="54"></td>
                <td onclick="V(55)" id="55"></td>
                <td onclick="V(56)" id="56"></td>
                <td onclick="V(57)" id="57"></td>
                <td onclick="V(58)" id="58"></td>
            </tr>
            <tr>
                <td onclick="V(61)" id="61"></td>
                <td onclick="V(62)" id="62"></td>
                <td onclick="V(63)" id="63"></td>
                <td onclick="V(64)" id="64"></td>
                <td onclick="V(65)" id="65"></td>
                <td onclick="V(66)" id="66"></td>
                <td onclick="V(67)" id="67"></td>
                <td onclick="V(68)" id="68"></td>
            </tr>
            <tr>
                <td onclick="V(71)" id="71"></td>
                <td onclick="V(72)" id="72"></td>
                <td onclick="V(73)" id="73"></td>
                <td onclick="V(74)" id="74"></td>
                <td onclick="V(75)" id="75"></td>
                <td onclick="V(76)" id="76"></td>
                <td onclick="V(77)" id="77"></td>
                <td onclick="V(78)" id="78"></td>
            </tr>
            <tr>
                <td onclick="V(81)" id="81">♙</td>
                <td onclick="V(82)" id="82">♙</td>
                <td onclick="V(83)" id="83">♙</td>
                <td onclick="V(84)" id="84">♙</td>
                <td onclick="V(85)" id="85">♙</td>
                <td onclick="V(86)" id="86">♙</td>
                <td onclick="V(87)" id="87">♙</td>
                <td onclick="V(88)" id="88">♙</td>
            </tr>
            <tr>
                <td onclick="V(91)" id="91">♖</td>
                <td onclick="V(92)" id="92">♘</td>
                <td onclick="V(93)" id="93">♗</td>
                <td onclick="V(94)" id="94">♕</td>
                <td onclick="V(95)" id="95">♔</td>
                <td onclick="V(96)" id="96">♗</td>
                <td onclick="V(97)" id="97">♘</td>
                <td onclick="V(98)" id="98">♖</td>
            </tr>
        </tbody>
    </table>

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    <p id="menu">
        <a href="http://1kchess.an3.es/" title="Click here to go back to game level selection (this game will NOT be saved).">« 1kChess</a> &nbsp; [ level: 3 ] &nbsp; <a href="http://1kchess.an3.es/play-level-advanced#info" onclick="with(document.getElementById(&#39;info&#39;)){style.display=style.display?&#39;&#39;:&#39;none&#39;}">( <b>?</b> )</a>
    </p>
    <div id="info" style="display:none">
        <p>
            In this level the computer will think a little while longer. For experts only! ;-)</p>
        <p>
            › To make your move, click on a white piece and then click on the target square.<br> › Press Ctrl and +/- to increase/decrease the chessboard's size.<br> › Hit F5 to start a new game (after checkmate or not).</p>
    </div>


    <p>
        © 2010-
        <script>
            document.write(new Date().getFullYear())
        </script>2016 Óscar Toledo G.
        <span>Modifications and this website by Andrés Moreno.</span>
        <br>
        <i>1kChess, play chess online with the only 1-kB chess game program!</i>
    </p>


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