This rules difference has no effect in terms of game outcome most of the time. For those rare situations where it does, most of those cases are where a draw under standard rules is a decisive game under PP rules. Row handicapping can be used to equalize the game for players of different strengths. The simplest handicap is to allow the weaker player to move first (i.e. eliminate the pie rule). Beyond that, one dimension of the grid is reduced so the weaker player has a shorter distance to span. The game may be played on different size grids. The 12×12 board shown here leads to a very short game. On the standard board, tactics dominate; larger boards introduce deeper strategic considerations. Since most commercial sets use boards which are made from four "quadrants" which either clip together or are hinged, a 36×36 grid could be assembled from three standard sets of the same size. In Europe, there briefly appeared a TwixT knock-off called "Imuri" which used a 30×30 grid. The board had no holes, and lines were drawn to indicate where the links could be placed. This edition was removed from shelves for copyright infringement. Mark Thompson's variant Diagonal TwixT has the same rules as standard TwixT, but the border lines run at a 45-degree angle to the grid. David Bush's version has the border lines running parallel to link paths. These variants result in different tactical patterns. Competition The official world championships were held as part of the Mind Sports Olympiad in 1997, 1998 and 1999. Since 2000 TwixT has had a major international tournament as part of the MSO but there has been no official World Championships. Since 2011, the TwixT event at the MSO has again become the World Championships. The list of winners is given below. List of MSO champions Reception Games magazine included TwixT in their "Top 100 Games of 1980", describing it as "much more subtle and interesting than the old Bridg-It, with which it should not be confused". Games magazine included TwixT in their "Top 100 Games of 1981", noting that "The best offense, oddly enough, is a good defense." Games magazine included TwixT in their "Top 100 Games of 1982", noting that "Subtlety and finesse will win every time against straightforward aggression in this game of great depth and varied tactics." Reviews Jeux & Stratégie #6 Games & Puzzles #18 See