Crosshair

Crosshair is a connection game where Red joins top to bottom and Blue joins left to right on a 7×7 board. Each move sends your opponent to the same row or column, or anywhere if that row and column are full. Sandwiching an adjacent enemy stone along a row or column flips it to your color, and completing a 2×2 checkerboard with your diagonal flips both enemy stones (cascading if a flip forms another 2×2 checkerboard).