Chutes and Ladders in Javascript (Computer vs Computer)

chutesnladders

function roll() {
     return Math.floor((Math.random()*6)+1);   
}

function turn(curPos) {
    var newPos = curPos+roll(); //get new position
 
    if(newPos>100) return 100; //Win!
    
    switch(newPos) { //apply chutes or ladders
        case 1: newPos = 38; break; 
        case 4: newPos = 14; break;
        case 9: newPos = 31; break;
        case 16: newPos = 6; break;
        case 21: newPos = 42; break;
        case 28: newPos = 84; break;
        case 36: newPos = 44; break;
        case 47: newPos = 26; break;
        case 49: newPos = 11; break;
        case 51: newPos = 67; break;
        case 56: newPos = 53; break;
        case 62: newPos = 19; break;
        case 64: newPos = 60; break;
        case 71: newPos = 91; break;
        case 80: newPos = 100; break;
        case 87: newPos = 24; break;
        case 93: newPos = 73; break;
        case 95: newPos = 75; break;
        case 98: newPos = 78; break;
    }
    return newPos;
}

var game = "", round = 0, playerA = 0, playerB = 0;
while(playerA!==100 && playerB!==100) {
    round++;
    playerA = turn(playerA);
    playerB = turn(playerB);
    game += "Player A: "+playerA+". Player B: "+playerB+"<br />";    
}

if(playerA==100) game += "Player A Wins"; else game += "Player B Wins";
game += " in "+round+" rounds!";

$('#game').html(game);