could connect left-to-right in 5 moves. Y The game of Y is Hex played on a triangular grid of hexagons; the object is for either player to connect all three sides of the triangle. Y is a generalization of Hex to the extent that any position on a Hex board can be represented as an equivalent position on a larger Y board. Havannah Havannah is game based on Hex. It differs from Hex in that it is played on a hexagonal grid of hexagons and a win is achieved by forming one of three patterns. Projex Projex is a variation of Hex played on a real projective plane, where the players have the goal of creating a noncontractible loop. Like in Hex, there are no ties, and there is no position in which both players have a winning connection. Competition As of 2016, there were tournaments reported from Brazil, Czech Republic, Denmark, France, Germany, Italy, Netherlands, Norway, Poland, Portugal, Spain, UK and the US. One of the largest Hex competitions is organized by the International Committee of Mathematical Games in Paris, France, which is annually held since 2013. Hex is also part of the Computer Olympiad. Reviews Games & Puzzles #16 See also Chinese Checkers, played on a hexagonal board Connection games Mathematical games GIPF project, a set of 6 games played on hexvalent grids Tak Y (game) References Further reading Hex Strategy: Making the Right Connections , Browne C.(2000), A.K. Peters Ltd. Natick, MA. (trade paperback, 363pgs) HEX: The Full Story, Hayward R. with Toft B.(2019), CRC Press Boca Raton, FL. (paperback) External links Hex: A Strategy Guide free Net book by Matthew Seymour 500 Hex Puzzles Interactive tactical puzzles by Matthew Seymour A Beginner's Guide to Hex Hex strategy for beginners by Matthew Seymour and Eric Silverman Thesis on Hex history, classification and complexity HexWiki, a wiki dedicated to Hex University of Alberta Computer Hex Research Group Theory page gathering theoretical work on Hex (moved - top level pages at Hex archive; downloadable material no longer available) Game of Hex at MathWorld with links to related mathematical papers Printable Hex boards on A4 or A3 paper, for use with standard Go stones 300dpi printable Hex board https://sites.google.com/view/cavegames-hex/home Board games introduced in 1942 Board games introduced in 1947 Abstract strategy games Connection games Positional games PSPACE-complete problems Parker Brothers games Paper-and-pencil games Solved games