function isTension($moveString)
{
//detect is a major piece is under attack
//Input: A string of moves in coordinate notation (e2e4)
// And if to limit results to major cpatures (i.e. not pawn captures)
$moves = explode(' ', $moveString);
$position = array(array('r', 'n', 'b', 'q', 'k', 'b', 'n', 'r'), array('p', 'p', 'p', 'p', 'p', 'p', 'p', 'p'), array(0, 0, 0, 0, 0, 0, 0, 0), array(0, 0, 0, 0, 0, 0, 0, 0), array(0, 0, 0, 0, 0, 0, 0, 0), array(0, 0, 0, 0, 0, 0, 0, 0), array('P', 'P', 'P', 'P', 'P', 'P', 'P', 'P'), array('R', 'N', 'B', 'Q', 'K', 'B', 'N', 'R'));
// indexed [number][letter]
foreach ($moves as $key => $move) {
$position = updatePosition($position, $move);
$isCheck = FALSE;
foreach ($position as $number => $column) {
//echo "1\n";
foreach ($column as $letter => $square) {
//echo "2\n";
if ($square !== 0) {
// Now to work out if the locus of each piece hits an opposite side king
if ($square === 'q') {
$collided = array('+x' => FALSE, '+y' => FALSE, '-x' => FALSE, '-y' => FALSE, '+x+y' => FALSE, '+x-y' => FALSE, '-x+y' => FALSE, '-x-y' => FALSE);
// straights
// +x
for ($x = $number + 1; $x < 8; $x++) {
//echo "$x 3\n";
if ($collided['+x'] === FALSE && $position[$x][$letter] === 'Q') {
$isCheck = TRUE;
$collided['+x'] = TRUE;
} else {
if ($collided['+x'] === FALSE && $position[$x][$letter] !== 0) {
$collided['+x'] = TRUE;
}
}
}
// -x
for ($x = $number - 1; $x >= 0; $x--) {
//echo "4\n";
if ($collided['-x'] === FALSE && $position[$x][$letter] === 'Q') {
$isCheck = TRUE;
$collided['-x'] = TRUE;
} else {
if ($collided['-x'] === FALSE && $position[$x][$letter] !== 0) {
$collided['-x'] = TRUE;
}
}
}
// +y
for ($x = $letter + 1; $x < 8; $x++) {
//echo "5\n";
if ($collided['+y'] === FALSE && $position[$number][$x] === 'Q') {
$isCheck = TRUE;
$collided['+y'] = TRUE;
} else {
if ($collided['+y'] === FALSE && $position[$number][$x] !== 0) {
$collided['+y'] = TRUE;
}
}
}
// -y
for ($x = $letter - 1; $x >= 0; $x--) {
//echo "6\n";
if ($collided['-y'] === FALSE && $position[$number][$x] === 'Q') {
$isCheck = TRUE;
$collided['-y'] = TRUE;
} else {
if ($collided['-y'] === FALSE && $position[$number][$x] !== 0) {
$collided['-y'] = TRUE;
}
}
}
// diagonals
// +x +y
$x = $letter + 1;
$y = $number + 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "7\n";
if ($collided['+x+y'] == FALSE && $position[$y][$x] === 'Q') {
$isCheck = TRUE;
$collided['+x+y'] = TRUE;
} else {
if ($collided['+x+y'] == FALSE && $position[$y][$x] !== 0) {
$collided['+x+y'] = TRUE;
}
}
$x++;
$y++;
}
// +x -y
$x = $letter + 1;
$y = $number - 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "8\n";
if ($collided['+x-y'] == FALSE && $position[$y][$x] === 'Q') {
$isCheck = TRUE;
$collided['+x-y'] = TRUE;
} else {
if ($collided['+x-y'] == FALSE && $position[$y][$x] !== 0) {
$collided['+x-y'] = TRUE;
}
}
$x++;
$y--;
}
// -x +y
$x = $letter - 1;
$y = $number + 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "9\n";
if ($collided['-x+y'] == FALSE && $position[$y][$x] === 'Q') {
$isCheck = TRUE;
$collided['-x+y'] = TRUE;
} else {
if ($collided['-x+y'] == FALSE && $position[$y][$x] !== 0) {
$collided['-x+y'] = TRUE;
}
}
$x--;
$y++;
}
// -x -y
$x = $letter - 1;
$y = $number - 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "10\n";
if ($collided['-x-y'] == FALSE && $position[$y][$x] === 'Q') {
$isCheck = TRUE;
$collided['-x-y'] = TRUE;
} else {
if ($collided['-x-y'] == FALSE && $position[$y][$x] !== 0) {
$collided['-x-y'] = TRUE;
}
}
$x--;
$y--;
}
} else {
if ($square === 'r') {
$collided = array('+x' => FALSE, '+y' => FALSE, '-x' => FALSE, '-y' => FALSE);
// straights
// +x
for ($x = $number + 1; $x < 8; $x++) {
//echo "11\n";
if ($collided['+x'] === FALSE && $position[$x][$letter] === 'Q') {
$isCheck = TRUE;
$collided['+x'] = TRUE;
} else {
if ($collided['+x'] === FALSE && $position[$x][$letter] !== 0) {
$collided['+x'] = TRUE;
}
}
}
// -x
for ($x = $number - 1; $x >= 0; $x--) {
//echo "12\n";
if ($collided['-x'] === FALSE && $position[$x][$letter] === 'Q') {
$isCheck = TRUE;
$collided['-x'] = TRUE;
} else {
if ($collided['-x'] === FALSE && $position[$x][$letter] !== 0) {
$collided['-x'] = TRUE;
}
}
}
// +y
for ($x = $letter + 1; $x < 8; $x++) {
//echo "13\n";
if ($collided['+y'] === FALSE && $position[$number][$x] === 'Q') {
$isCheck = TRUE;
$collided['+y'] = TRUE;
} else {
if ($collided['+y'] === FALSE && $position[$number][$x] !== 0) {
$collided['+y'] = TRUE;
}
}
}
// -y
for ($x = $letter - 1; $x >= 0; $x--) {
//echo "14\n";
if ($collided['-y'] === FALSE && $position[$number][$x] === 'Q') {
$isCheck = TRUE;
$collided['-y'] = TRUE;
} else {
if ($collided['-y'] === FALSE && $position[$number][$x] !== 0) {
$collided['-y'] = TRUE;
}
}
}
} else {
if ($square === 'b') {
$collided = array('+x+y' => FALSE, '+x-y' => FALSE, '-x+y' => FALSE, '-x-y' => FALSE);
// diagonals
// +x +y
$x = $letter + 1;
$y = $number + 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "15\n";
if ($collided['+x+y'] == FALSE && ($position[$y][$x] === 'Q' || $position[$y][$x] === 'R')) {
$isCheck = TRUE;
$collided['+x+y'] = TRUE;
} else {
if ($collided['+x+y'] == FALSE && $position[$y][$x] !== 0) {
$collided['+x+y'] = TRUE;
}
}
$x++;
$y++;
}
// +x -y
$x = $letter + 1;
$y = $number - 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "16\n";
if ($collided['+x-y'] == FALSE && ($position[$y][$x] === 'Q' || $position[$y][$x] === 'R')) {
$isCheck = TRUE;
$collided['+x-y'] = TRUE;
} else {
if ($collided['+x-y'] == FALSE && $position[$y][$x] !== 0) {
$collided['+x-y'] = TRUE;
}
}
$x++;
$y--;
}
// -x +y
$x = $letter - 1;
$y = $number + 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "17\n";
if ($collided['-x+y'] == FALSE && ($position[$y][$x] === 'Q' || $position[$y][$x] === 'R')) {
$isCheck = TRUE;
$collided['-x+y'] = TRUE;
} else {
if ($collided['-x+y'] == FALSE && $position[$y][$x] !== 0) {
$collided['-x+y'] = TRUE;
}
}
$x--;
$y++;
}
// -x -y
$x = $letter - 1;
$y = $number - 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "18\n";
if ($collided['-x-y'] == FALSE && ($position[$y][$x] === 'Q' || $position[$y][$x] === 'R')) {
$isCheck = TRUE;
$collided['-x-y'] = TRUE;
} else {
if ($collided['-x-y'] == FALSE && $position[$y][$x] !== 0) {
$collided['-x-y'] = TRUE;
}
}
$x--;
$y--;
}
} else {
if ($square === 'n') {
//L shapes
// ++x +y
if ($letter + 2 < 8 && $number + 1 < 8) {
if ($position[$number + 1][$letter + 2] === 'Q' || $position[$number + 1][$letter + 2] === 'R') {
$isCheck = TRUE;
}
}
// ++x -y
if ($letter + 2 < 8 && $number - 1 >= 0) {
if ($position[$number - 1][$letter + 2] === 'Q' || $position[$number - 1][$letter + 2] === 'R') {
$isCheck = TRUE;
}
}
// --x +y
if ($letter - 2 >= 0 && $number + 1 < 8) {
if ($position[$number + 1][$letter - 2] === 'Q' || $position[$number + 1][$letter - 2] === 'R') {
$isCheck = TRUE;
}
}
// --x -y
if ($letter - 2 >= 0 && $number - 1 >= 0) {
if ($position[$number - 1][$letter - 2] === 'Q' || $position[$number - 1][$letter - 2] === 'R') {
$isCheck = TRUE;
}
}
// ++y +x
if ($letter + 1 < 8 && $number + 2 < 8) {
if ($position[$number + 2][$letter + 1] === 'Q' || $position[$number + 2][$letter + 1] === 'R') {
$isCheck = TRUE;
}
}
// ++y -x
if ($letter - 1 >= 0 && $number + 2 < 8) {
if ($position[$number + 2][$letter - 1] === 'Q' || $position[$number + 2][$letter - 1] === 'R') {
$isCheck = TRUE;
}
}
// --y +x
if ($letter + 1 < 8 && $number - 2 >= 0) {
if ($position[$number - 2][$letter + 1] === 'Q' || $position[$number - 2][$letter + 1] === 'R') {
$isCheck = TRUE;
}
}
// --y -x
if ($letter - 1 >= 0 && $number - 2 >= 0) {
if ($position[$number - 2][$letter - 1] === 'Q' || $position[$number - 2][$letter - 1] === 'R') {
$isCheck = TRUE;
}
}
} else {
if ($square === 'p') {
// +y -x
if ($letter - 1 >= 0 && $number + 1 < 8) {
if ($position[$number + 1][$letter - 1] === 'Q' || $position[$number + 1][$letter - 1] === 'R' || $position[$number + 1][$letter - 1] === 'N' || $position[$number + 1][$letter - 1] === 'B') {
$isCheck = TRUE;
}
}
// +y +x
if ($letter + 1 < 8 && $number + 1 < 8) {
if ($position[$number + 1][$letter + 1] === 'Q' || $position[$number + 1][$letter + 1] === 'R' || $position[$number + 1][$letter + 1] === 'N' || $position[$number + 1][$letter + 1] === 'B') {
$isCheck = TRUE;
}
}
} else {
if ($square === 'Q') {
$collided = array('+x' => FALSE, '+y' => FALSE, '-x' => FALSE, '-y' => FALSE, '+x+y' => FALSE, '+x-y' => FALSE, '-x+y' => FALSE, '-x-y' => FALSE);
// straights
// +x
for ($x = $number + 1; $x < 8; $x++) {
//echo "19\n";
if ($collided['+x'] === FALSE && $position[$x][$letter] === 'q') {
$isCheck = TRUE;
$collided['+x'] = TRUE;
} else {
if ($collided['+x'] === FALSE && $position[$x][$letter] !== 0) {
$collided['+x'] = TRUE;
}
}
}
// -x
for ($x = $number - 1; $x >= 0; $x--) {
//echo "20\n";
if ($collided['-x'] === FALSE && $position[$x][$letter] === 'q') {
$isCheck = TRUE;
$collided['-x'] = TRUE;
} else {
if ($collided['-x'] === FALSE && $position[$x][$letter] !== 0) {
$collided['-x'] = TRUE;
}
}
}
// +y
for ($x = $letter + 1; $x < 8; $x++) {
//echo "21\n";
if ($collided['+y'] === FALSE && $position[$number][$x] === 'q') {
$isCheck = TRUE;
$collided['+y'] = TRUE;
} else {
if ($collided['+y'] === FALSE && $position[$number][$x] !== 0) {
$collided['+y'] = TRUE;
}
}
}
// -y
for ($x = $letter - 1; $x >= 0; $x--) {
//echo "22\n";
if ($collided['-y'] === FALSE && $position[$number][$x] === 'q') {
$isCheck = TRUE;
$collided['-y'] = TRUE;
} else {
if ($collided['-y'] === FALSE && $position[$number][$x] !== 0) {
$collided['-y'] = TRUE;
}
}
}
// diagonals
// +x +y
$x = $letter + 1;
$y = $number + 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "23\n";
if ($collided['+x+y'] == FALSE && $position[$y][$x] === 'q') {
$isCheck = TRUE;
$collided['+x+y'] = TRUE;
} else {
if ($collided['+x+y'] == FALSE && $position[$y][$x] !== 0) {
$collided['+x+y'] = TRUE;
}
}
$x++;
$y++;
}
// +x -y
$x = $letter + 1;
$y = $number - 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "24\n";
if ($collided['+x-y'] == FALSE && $position[$y][$x] === 'q') {
$isCheck = TRUE;
$collided['+x-y'] = TRUE;
} else {
if ($collided['+x-y'] == FALSE && $position[$y][$x] !== 0) {
$collided['+x-y'] = TRUE;
}
}
$x++;
$y--;
}
// -x +y
$x = $letter - 1;
$y = $number + 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "25\n";
if ($collided['-x+y'] == FALSE && $position[$y][$x] === 'q') {
$isCheck = TRUE;
$collided['-x+y'] = TRUE;
} else {
if ($collided['-x+y'] == FALSE && $position[$y][$x] !== 0) {
$collided['-x+y'] = TRUE;
}
}
$x--;
$y++;
}
// -x -y
$x = $letter - 1;
$y = $number - 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "26\n";
if ($collided['-x-y'] == FALSE && $position[$y][$x] === 'q') {
$isCheck = TRUE;
$collided['-x-y'] = TRUE;
} else {
if ($collided['-x-y'] == FALSE && $position[$y][$x] !== 0) {
$collided['-x-y'] = TRUE;
}
}
$x--;
$y--;
}
} else {
if ($square === 'R') {
$collided = array('+x' => FALSE, '+y' => FALSE, '-x' => FALSE, '-y' => FALSE);
// straights
// +x
for ($x = $number + 1; $x < 8; $x++) {
//echo "27\n";
if ($collided['+x'] === FALSE && $position[$x][$letter] === 'q') {
$isCheck = TRUE;
$collided['+x'] = TRUE;
} else {
if ($collided['+x'] === FALSE && $position[$x][$letter] !== 0) {
$collided['+x'] = TRUE;
}
}
}
// -x
for ($x = $number - 1; $x >= 0; $x--) {
//echo "28\n";
if ($collided['-x'] === FALSE && $position[$x][$letter] === 'q') {
$isCheck = TRUE;
$collided['-x'] = TRUE;
} else {
if ($collided['-x'] === FALSE && $position[$x][$letter] !== 0) {
$collided['-x'] = TRUE;
}
}
}
// +y
for ($x = $letter + 1; $x < 8; $x++) {
//echo "29\n";
if ($collided['+y'] === FALSE && $position[$number][$x] === 'q') {
$isCheck = TRUE;
$collided['+y'] = TRUE;
} else {
if ($collided['+y'] === FALSE && $position[$number][$x] !== 0) {
$collided['+y'] = TRUE;
}
}
}
// -y
for ($x = $letter - 1; $x >= 0; $x--) {
//echo "30\n";
if ($collided['-y'] === FALSE && $position[$number][$x] === 'q') {
$isCheck = TRUE;
$collided['-y'] = TRUE;
} else {
if ($collided['-y'] === FALSE && $position[$number][$x] !== 0) {
$collided['-y'] = TRUE;
}
}
}
} else {
if ($square === 'B') {
$collided = array('+x+y' => FALSE, '+x-y' => FALSE, '-x+y' => FALSE, '-x-y' => FALSE);
// diagonals
// +x +y
$x = $letter + 1;
$y = $number + 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "31\n";
if ($collided['+x+y'] == FALSE && ($position[$y][$x] === 'q' || $position[$y][$x] === 'r')) {
$isCheck = TRUE;
$collided['+x+y'] = TRUE;
} else {
if ($collided['+x+y'] == FALSE && $position[$y][$x] !== 0) {
$collided['+x+y'] = TRUE;
}
}
$x++;
$y++;
}
// +x -y
$x = $letter + 1;
$y = $number - 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "32\n";
if ($collided['+x-y'] == FALSE && ($position[$y][$x] === 'q' || $position[$y][$x] === 'r')) {
$isCheck = TRUE;
$collided['+x-y'] = TRUE;
} else {
if ($collided['+x-y'] == FALSE && $position[$y][$x] !== 0) {
$collided['+x-y'] = TRUE;
}
}
$x++;
$y--;
}
// -x +y
$x = $letter - 1;
$y = $number + 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "33\n";
if ($collided['-x+y'] == FALSE && ($position[$y][$x] === 'q' || $position[$y][$x] === 'r')) {
$isCheck = TRUE;
$collided['-x+y'] = TRUE;
} else {
if ($collided['-x+y'] == FALSE && $position[$y][$x] !== 0) {
$collided['-x+y'] = TRUE;
}
}
$x--;
$y++;
}
// -x -y
$x = $letter - 1;
$y = $number - 1;
while ($x < 8 && $y < 8 && $x >= 0 && $y >= 0) {
//echo "34\n";
if ($collided['-x-y'] == FALSE && ($position[$y][$x] === 'q' || $position[$y][$x] === 'r')) {
$isCheck = TRUE;
$collided['-x-y'] = TRUE;
} else {
if ($collided['-x-y'] == FALSE && $position[$y][$x] !== 0) {
$collided['-x-y'] = TRUE;
}
}
$x--;
$y--;
}
} else {
if ($square === 'N') {
//L shapes
// ++x +y
if ($letter + 2 < 8 && $number + 1 < 8) {
if ($position[$number + 1][$letter + 2] === 'q' || $position[$number + 1][$letter + 2] === 'r') {
$isCheck = TRUE;
}
}
// ++x -y
if ($letter + 2 < 8 && $number - 1 >= 0) {
if ($position[$number - 1][$letter + 2] === 'q' || $position[$number - 1][$letter + 2] === 'r') {
$isCheck = TRUE;
}
}
// --x +y
if ($letter - 2 >= 0 && $number + 1 < 8) {
if ($position[$number + 1][$letter - 2] === 'q' || $position[$number + 1][$letter - 2] === 'r') {
$isCheck = TRUE;
}
}
// --x -y
if ($letter - 2 >= 0 && $number - 1 >= 0) {
if ($position[$number - 1][$letter - 2] === 'q' || $position[$number - 1][$letter - 2] === 'r') {
$isCheck = TRUE;
}
}
// ++y +x
if ($letter + 1 < 8 && $number + 2 < 8) {
if ($position[$number + 2][$letter + 1] === 'q' || $position[$number + 2][$letter + 1] === 'r') {
$isCheck = TRUE;
}
}
// ++y -x
if ($letter - 1 >= 0 && $number + 2 < 8) {
if ($position[$number + 2][$letter - 1] === 'q' || $position[$number + 2][$letter - 1] === 'r') {
$isCheck = TRUE;
}
}
// --y +x
if ($letter + 1 < 8 && $number - 2 >= 0) {
if ($position[$number - 2][$letter + 1] === 'q' || $position[$number - 2][$letter + 1] === 'r') {
$isCheck = TRUE;
}
}
// --y -x
if ($letter - 1 >= 0 && $number - 2 >= 0) {
if ($position[$number - 2][$letter - 1] === 'q' || $position[$number - 2][$letter - 1] === 'r') {
$isCheck = TRUE;
}
}
} else {
if ($square === 'P') {
// -y -x
if ($letter - 1 >= 0 && $number - 1 >= 0) {
if ($position[$number - 1][$letter - 1] === 'q' || $position[$number - 1][$letter - 1] === 'r' || $position[$number - 1][$letter - 1] === 'n' || $position[$number - 1][$letter - 1] === 'b') {
$isCheck = TRUE;
}
}
// -y +x
if ($letter + 1 < 8 && $number - 1 >= 0) {
if ($position[$number - 1][$letter + 1] === 'q' || $position[$number - 1][$letter + 1] === 'r' || $position[$number - 1][$letter + 1] === 'n' || $position[$number - 1][$letter + 1] === 'b') {
$isCheck = TRUE;
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
return $isCheck;
}
function getPosition($points)
{
$score = getFinalScore();
$pos = 0;
foreach ($score as $elemento) {
$pos = $elemento['posizione'];
if ($points > $elemento['punti']) {
updatePosition($points);
return $pos;
} else {
if ($points == $elemento['punti']) {
return $pos;
}
}
}
return $pos + 1;
}
