Next come Y-shapes and Ts that can move three different ways. As levels increase in complexity, you meet each quirky piece in wonderfully complex combinations. Some can't back up, and some can't go right. Elsewhere you might have three queens and a pack of mutant pawns. Eighty levels are offered in the full version.
Some levels are almost fiendish with their holes and dead-ends.
It's like changing bishops to rooks. Diagonals trade with crosses and three-angled Y's come out upside down. Board designs aren't always simple squares. You might face an hourglass shape that allows a small amount of weak pieces to control the middle. One level looked like dueling squadrons of Y-shaped fighter jets aimed at each other, giving the scenario a kind of Chinese Checkers feel.