Single Comment

The same thing was happening. Since the code checks the legality of an actual move after it has moved the pieces, the destination space is always occupied at that time. So, the problem is just the same as it is for a potential move that is a capture.

I think I fixed it by changing this code:

function logleap ($from,  $to,  $ra) {
    global $map,  $space;

    $ns = $from;
    for ($i = 0; $i < count($ra); $i++) {
        $dir = $ra[$i];
        $temp = false;
        if (is_array($dir)) {
            if (($temp = logleap($from,  $to,  $dir)) == $to)
                return $temp;
        }
        elseif (isset($map[$ns][$dir]))
            $ns = $map[$ns][$dir];
        else
            $ns = false;
        if ($space[$ns] != '@')
            break;
    }
    if (($temp == false) && ($i < count($ra)))
        return false;
    return $temp ? $temp : $ns;
}

to this:

function logleap ($from,  $to,  $ra) {
    global $map,  $space;

    $ns = $from;
    for ($i = 0; $i < count($ra); $i++) {
        if (($i > 0) && ($space[$ns] != '@'))
            break;
        $dir = $ra[$i];
        $temp = false;
        if (is_array($dir)) {
            if (($temp = logleap($from,  $to,  $dir)) == $to)
                return $temp;
        }
        elseif (isset($map[$ns][$dir]))
            $ns = $map[$ns][$dir];
        else
            $ns = false;
    }
    if (($temp == false) && ($i < count($ra)))
        return false;
    return $temp ? $temp : $ns;
}