TRIANON
Copyright (c) 1992 Hans van Maanen
Trianon is a game played on a 5x5 board:
- TURN - On each turn, each player drops a stone on an empty cell
- GOAL - 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 example White'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).