Splinter
	The splinter bid is showing a singleton or void and trump support for partner. The most common splinter bid is the double jump shift:
	West	East
	1S	4D
	East's 4D bid shows a forcing raise in spades (four-card support) and diamond shortness (singleton or void). The splinter bid in this situation does not show massive power and should be limited to app. 11 to 14 HCP. The splinter suggests a slam might be possible if the hands are "working." This means that if West had three or four small diamonds he may be able to make a slam because all of East's high card points will be in the other suits and hands will be "working together." If West has a number of high card points in diamonds, he has a warning that those values may be "wasted" and slam should be avoided. For this reason, it is imperative that East does not make a splinter bid with a singleton ace or king of diamonds.
	Note 1:
	In competition after opponent's takeout double, splinter bids are still "on".
	Note 2:
	In non-competitive auctions, Splinter bids may be extended to areas of rebidding, by both opener and responder. In this respect the "rule of thumb" is if a particular new-suit bid would be forcing, then one level higher in that same suit is a splinter bid.