An answer of http://nabetani.sakura.ne.jp/hena/1/

tick_tack_toe.js

var _ = require("./node_modules/underscore");

exports.solve = function(src) {
    'use strict';
    var first = [],
    second = [],
    curPlayer = [],
    n = 0,
    result = '';
    for(var i = 0; i < src.length; ++i) {
        n = parseInt(src[i], 10);
        curPlayer = { 0: first, 1: second }[i % 2];
        if( isLined(curPlayer.concat(n)) ) {
            result = { 0: 'o won.', 1: 'x won.' }[i % 2];
            break;
        }
        if( isFoul(n, first, second) ) {
            result = { 0: 'Foul : x won.', 1: 'Foul : o won.' }[i % 2];
            break;
        }
        curPlayer.push(n);
        if( isGameFinished( first.concat(second) ) ) { 
            break;
        }   
    }   
    return result === '' ? 'Draw game.' : result;
};

function isLined(hand) {
    'use strict';
    var a = [
        [1, 2, 3], [4, 5, 6], [7, 8, 9],
        [1, 4, 7], [2, 5, 8], [3, 6, 9],
        [1, 5, 9], [3, 5, 7]
    ];
    for(var i = 0; i < a.length; ++i) {
        if(_.contains(hand, a[i][0]) &&
            _.contains(hand, a[i][1]) &&
            _.contains(hand, a[i][2])) {
            return true;
        }
    }
    return false;
}

function isFoul(n, first, second) {
    'use strict';
    var field = first.concat(second);
    return _.contains(field, n);
}

function isGameFinished(field) {
    'use strict';
    return field.sort(function(x, y) {
        return y < x;
    }).join() === '1,2,3,4,5,6,7,8,9';
}

tick_tack_toe_spec.js

var tick_tack_toe = require('./tick_tack_toe');

describe("tick_tack_toe.solve", function() {

    var inputs = [
        ['79538246', 'x won.'],
        ['35497162193', 'x won.'],
        ['61978543', 'x won.'],
        ['254961323121', 'x won.'],
        ['6134278187', 'x won.'],
        ['4319581', 'Foul : x won.'],
        ['9625663381', 'Foul : x won.'],
        ['7975662', 'Foul : x won.'],
        ['2368799597', 'Foul : x won.'],
        ['18652368566', 'Foul : x won.'],
        ['965715', 'o won.'],
        ['38745796', 'o won.'],
        ['371929', 'o won.'],
        ['758698769', 'o won.'],
        ['42683953', 'o won.'],
        ['618843927', 'Foul : o won.'],
        ['36535224', 'Foul : o won.'],
        ['882973', 'Foul : o won.'],
        ['653675681', 'Foul : o won.'],
        ['9729934662', 'Foul : o won.'],
        ['972651483927', 'Draw game.'],
        ['5439126787', 'Draw game.'],
        ['142583697', 'Draw game.'],
        ['42198637563', 'Draw game.'],
        ['657391482', 'Draw game.']
    ];

    for(var i = 0; i < inputs.length; ++i) {
        (function(src, expected) {
            it("should return " + expected + " (" + i + ").", function() {
                var actual = tick_tack_toe.solve(src);
                expect(actual).toBe(expected);
            });
        })(inputs[i][0], inputs[i][1]);
    }

});