A course on slam bidding, which deals with a method of showing strong supporting hands with singletons or voids.
The reason splinters are so popular is because evaluating your hand opposite a shortage is accurate – it allows the partner to see whether two hands are fitting together or not. When two hands fit perfectly with a singleton fitting in each hand, you can make slams on very low point counts. So often when players ask me how they could have bid a slam after having made 12 or 13 tricks, my response will be: well if you had used a splinter bid…