Memory Grid Lobby

A best-of-5 rounds pattern duel. Pure memory, no symbols or tricks. Each round deals an N×N grid(growing 3×3 → 5×5) with a handful of lit tiles. You get a few seconds to memorize the pattern, then you reconstruct it from memory. More tiles right wins the round; after 5 rounds the higher total score wins the pot. 1.9×, house takes 0.1×. Equal → full refund.