Spiral Raises

Spiral raises module is used when there is a major fit at (or a step below) 2M, and an 8-card fit is not certain. Spiral raises are applied in the following sequences:

• 1M - 2M (Simple raises)
• 1♥ - 2♦ / 1♠ - 2♥ (Transfer raises)
• 1♥ - 1♠; 2♠ (Treated as simple raise)
• In competition where only 4-3 fit is established
• Any modes of the above sequence

Since an 8-card fit is not established, we have the following continuations.

Simple Raises

… 2M (strength is denied, i.e. Mode 0 / 3)

• P
  No Extra shape
• 2N
  6+M. Max
• 3m
  4=M 6+m (canape)
• oM
  5+M 5+oM
• 3M
  (5)6+M. Blocking

… 2M (strength is possible)

• P
  Less than inv. Others promise inv+ values
• 2♠
  4+♠. May be 4♠4♥(41)
• 2N
  4441 short oM
• 3m
  4=M 5+m (canape). NF
• 3♥
  (After 3♠) 5+♠ and ♥ value
• 3M
  (5)6+M. Blocking
• 3N
  4=M COG
• 4m
  4=M (6)7+m. Too great for 3m

Transfer Raises

… 1♥ - 2♦ or … 1♠ - 2♥

• 2M
  Min NF. Very min if 5-cards

  • P
    To play
  • 2♠
    4=♠ 3=♥ Inv
  • 2N
    Bal inv. 3=M
  • 3m
    5+m. NF
  • 3M
    4-5=M inv
  • 3oM
    4=oM 3=M COG
  • 3N
    3=M COG
• Higher
  Same as simple raises. Inv sequences are still inv