Spiral Raises
After opening a minor, responder bidding a major with 4 of the suit, and opener raising with possibly just 3 of the suit, responder can bid one level up from the raise to ask opener to describe her hand.
1 -1
2 - 2 asks opener to describe his strength and shape.
2N = balanced 3-card raise, 11-14 points
3 = balanced 4-card raise, 11+ points
3 = unbalanced 3-card raise, <3 spades
3 = unbalanced 4-card raise, <3 spades
3 = Splinter, 4-card support, 11+ points
3N = balanced 3-card raise, 15+ points
4 other minor = Splinter, 4-card support, 11+ points
4 same minor = 5422, 15+ points
4 = 5422, 11-14 points
1 -1
2 - 2N asks opener to describe his strength and shape.
3 = balanced 3-card raise, 11-14 points
3 = balanced 4-card raise, 11+ points
3 = unbalanced 3-card raise, <3 hearts
3 = unbalanced 4-card raise, <3 hearts
3N = balanced 3-card raise, 15+ points
4 other minor = Splinter, 4-card support, 11+ points
4 same minor = 5422, 15+ points
4 5422, 11-14 points
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