Amaze Kings runs the same logic as the lunchtime Queens puzzle everyone already plays — one crown per row, column, and colored region, no two touching — except it never stops after one board a day. It has 1,400 levels from a 5×5 warm-up to a 20×20 monster, each checked by a solver that permits only human deduction techniques, so a guess is never required. Free to start; €5.99 unlocks all sixteen realms, one time, no subscription.