Expert is the hardest tier we make. Each outline has at most four ways to fit all seven tans, and nearly every first placement leads nowhere. Many boards only work with the parallelogram flipped onto its mirrored side, which is the last thing most players try.
The board gives you less help, too. There is no outline preview showing where a piece would land while you drag it, so you only learn whether a spot fits when you let go. You get one hint per board, and a hinted solve keeps your streak but never sets a best time. Saturday's daily puzzle is an expert board, or pick one below any time you want a proper fight.