Class: visualboard

Parameters:

If castling rights have been taken away by a king or rook move, the button is not displayed. This function uses Games_Chess::canCastleKingside(), Games_Chess::canCastleQueenside() to find out.

Parameters:

If $_GET['start'] is not used, it checks for $_GET['kingcastle'] and tries to castle kingside if found. Otherwise, it looks for $_GET['queencastle'] and tries to castle queenside

Using the alert() function, this method asks the user if they want a queen. If they click Cancel, it asks if they want a rook, then knight, then bishop. If they cancel on bishop, it promotes to queen to avoid any illogical possibilities

first, it checks for a pawn promotion and adds the promote move to $moves using game::addpromote(). Then it moves the next piece by calling domove(). Then it checks for stalemate and checkmate, and stops the gameplay if either condition is met. It creates a visual representation of the board using abstractboard::createrows(), and displays the chessboard by linking together the display of each row on the chessboard using row::draw(), and finally the movelist using game::draw()

function javascript()

    {?>
<script language="JavaScript" type="text/javascript">
<!--
function addMove(move, piece)
{
    if (document.forms[0].start.value == '')
    {
        document.forms[0].start.value = move;
        switch (piece)
        {
            case "P" :
            case "Q" :
            case "R" :
            case "B" :
            case "N" :
            case "K" :
            break;
            default :
                piece = null;
            break;
        }
        document.forms[0].startpiece.value = piece;
    } else
    {
        if (document.forms[0]["goto"].value == '')
        {
            document.forms[0]["goto"].value = move;
            first = document.forms[0].startpiece.value;
            if (first) {
                if (first == "P") {
                    first = "";
                    if (piece) {
                        first = document.forms[0].start.value.charAt(0) + "x";
                    }
                } else {
                    if (piece) {
                        first += "x";
                    }
                }
            }
            if (confirm("Do this move? (" + first + move + ")"))
            {
                document.forms[0].submit();
            } else {
                document.forms[0].start.value = '';
                document.forms[0].startpiece.values = '';
                document.forms[0]["goto"].value = '';
                document.forms[0].SAN.value = '';
            }
        }
    }
}
 
function doPlacement(piece)
{
    switch (piece) {
        case "P" :
            name = "Pawn";
        break;
        case "Q" :
            name = "Queen";
        break;
        case "R" :
            name = "Rook";
        break;
        case "B" :
            name = "Bishop";
        break;
        case "N" :
            name = "Knight";
        break;
    }
    square = prompt("Where should the " + name + " be placed (a1-h8, a1 is lower left)?", "e4");
    if (square) {
        document.forms[0].SAN.value = piece + "@" + square;
        document.forms[0].start.value = "";
        document.forms[0]["goto"].value = "";
        if (square.charAt(1) == "1" || square.charAt(1) == "8") {
            document.forms[0].SAN.value = '';
            document.forms[0].start.value = "";
            document.forms[0]["goto"].value = "";
            alert("Cannot place a pawn on the first or last rank");
        } else {
            document.forms[0].submit();
        }
    }
}
//-->
</script>
<?php
    }