Ruler Rival

Place a wooden rule across two vertically adjacent empty squares. The rival answers across two horizontally adjacent squares, and every fitted rule stays on the mat. When the next side has no legal turn, that side loses. Rivet plugs and earlier placements shape every decision. Eighteen different mats have complete winning routes, and any legal winning sequence counts. The cutter enlarges actual available two-square fits before you commit one. A single short-rule ticket lets you occupy one empty square instead, costs forty points and uses a full turn; the rival's search accounts for this exception. The caliper previews the exact square and spends that real ticket. Your current mat and earned progress stay on your device. The game is entirely in English, works offline and has no accounts, advertising or purchases.