Features:
- gomoku rules
- renju rules
- computer/human opponent
- 4 difficulty levels
- board size from 10 to 20
- 3 board zoom levels
- replay previous moves
- games statistics
- save/load games
- undo move
- hint move
- highlight threat moves
- highlight invalid moves
- 2d/3d board
- board index
- stone turn number
- stone ply number
- move by pressing board
- move by pressing button