Splinter raises : Facts sheet
  1. 1♥ - 4♥     1♠ - 4♠ = 6-10 HCP, 4+trumps, void or singleton (no singleton Honour)

  2. A double jump shift is a Splinter, showing 4+card support for the previously bid suit, 11+ HCP, a void or singleton (no singleton Honour) and 7 losers or less.
    1♥ - 3♠   or   1♥ - 4♣   or   1♥ - 4♦
    1♠ - 4♣   or   1♠ - 4♦   or   1♠ - 4♥   = 11+ HCP, 4+trumps, void or singleton

  3. Where a change of suit would be forcing, a single jump rebid is also a Splinter.
    1♠ - 2♥ - 4♣ = Splinter
    1♥ - 2♣ - 2♥ - 3♠ = Splinter

  4. Splinter raises of the minor suits are usually only double junps to the 3-level to allow for a 3NT contract :
    1♣ - 3♦, 3♥, 3♠   or
    1♦ - 3♥, 3♠         = 11+ HCP, 4+trumps, void or singleton (no singleton Honour)
    It conveys : "Partner if you have this suit covered bid 3NT"

  5. The bid of a new suit after a Splinter raise is a Cue bid showing an Ace (or void).
    Bid Aces up the line, skipping a suit denies the Ace in that suit
    For example : 1♥ - 3♠ - 4♦ : shows the A♦ and denies having the A♣.

  6. The jump bid of a new suit after a Splinter raise shows a void in that suit, and asks Partner for his number of Aces in the other three suits ("Voidwood") : 1♥ - 3♠ - 5♦

© 2014 Michael Furstner