[straube]

Spade is limited to good 10 to bad 15. We want 2D to be GF or 12-13 with 6 diamonds willing to play 3D if misfitting. 2D promises 5 diamonds or 3 spades

2H-4+ hearts
..2S-relays
.....2N-5/5
.........3C-relays
.....3C-4, higher
.........3D-relays
2S-6 of M, possible 4 clubs-treat 6421 like a 6331
..2N-relays
2N-5 clubs
..3C-relays
3C-3 or 4-fit, no extra major suit length
.....3D-agrees diamonds
..........3H-higher (1-5-4-3)
..........3S-lower (3-5-4-1)
..........3N-no shortness (5422 or 5332)
3D-minimum, 1 or 2 diamonds, nf
3H-6S/4D
.....3S-asks what?
3S-5-1-3-4
3N-maximum, 1 or 2 diamonds
4C-5 diamonds, higher
4D-5 diamonds, lower

Any tweaking?

[straube]

Maybe...

2H-4+ hearts
..2S-relays
.....2N-5/5
.........3C-relays
.....3C-4, higher
.........3D-relays
2S-6 of M, possible 4 clubs-treat 6421 like a 6331
..2N-relays
2N-5 clubs
..3C-relays
3C-3 or 4-fit, no extra major suit length
.....3D-agrees diamonds
..........3H-higher (1-5-4-3 or 1-5-3-4)
..........3S-lower (3-5-4-1)
..........3N-no shortness (5422 or 5332)
3D-minimum, 5-3-1-4
3H-6S/4D
3S-7S/4D
3N-5323 or max 5-3-1-4
4C-5 diamonds, higher
4D-5 diamonds, lower