Triangle Trap
Draw lines, dodge triangles — make your rival crack first.
About the Game
Dots are arranged around a frame, and players take turns drawing a line between two unconnected dots in their own color. The rule: never let your line be the one that closes a forbidden shape — some levels forbid triangles, others add rules like never closing a loop of four. Whoever is forced to complete a forbidden shape first loses; played live against a real opponent, best of three rounds.
What Your Child Practices
Quickly scanning the growing line network for near-complete forbidden shapes.
What counts as a 'closed shape' when connecting points — an accessible introduction to the real mathematical game Sim.
The same rule set applies across levels that escalate which shapes are forbidden.
Looking ahead at what shape each candidate line would create or enable for the opponent before committing to it.
Frequently asked questions
Triangle Trap is tagged for Grades 4–12 — levels inside the game raise the difficulty further as your child improves.
Triangle Trap is a 1v1 game — turn-based head-to-head, players alternate moves in one shared game.
No — Triangle Trap plays directly in the browser, right on this page. No login, no download.
What counts as a 'closed shape' when connecting points — an accessible introduction to the real mathematical game Sim.
No — Triangle Trap is free to play, no sign-up needed.