TrigChess

TrigChess is a 2-player strategy board game built around trigonometry (sin, cos, tan). On a 7×7 board, each team places 7 pieces (0, 1, 2, 3) and secretly assigns every piece an angle from −85° to 85° (multiples of 5, summing to 0). When two pieces meet, the function and sign on the boundary between them decide the winner, and the winner absorbs the loser's angle. Capture the opponent's 0-piece — or every piece except their 0 — to win.