A pay line system has a novel type of pay line that can be provided in a variety of different display systems, including at least 3×3 reel-type displays, 3×4, 4×3, 3×5, 5×3, 4×5 and 5×4 displays. The pay lines are preferably displayed on 3×5 or 5×3 window formats and comprise “horseshoe”...http://www.google.com/patents/US8100751?utm_source=gb-gplus-sharePatent US8100751 - Horseshoe payline system and games using that system
