TRIANON

Copyright (c) 1992 Hans van MaanenTrianon is a game played on a 5x5 board:

TURN- On each turn, each player drops a stone on an empty cellGOAL- A player loses if he has 3 friendly stones on an orthogonal or diagonal line (they don't need to be adjacent to each other).

An exampleWhite's turn. In this position, every White drop makes a 3 in-a-row and that implies losing the game.

The board should not have edges with even size, because a symmetry strategy for the second player exist. There's a website with information about the game (in Dutch).