Lets assume, that we arrive to a 3NT bid from opener after the following bidding: 1♣-1♥-1♠-2♦-3NT. If 2♦ was a game invitational or better convention, and to that 3NT showed extra value from the opener, now responder has only 2 free positions to go to slam in forcing way, but we need them for signing 3 suits for the opener: his opening and 2nd suit, and our own suit slam forcing hand. What should we do?
My solution is, that 4♦ should be RKC in opener's suit, not considering, that it was 1♣ or 1♦.
If we do so, our 4♣ bid can ask 4♦ relay, and to that we can ask RKC in both major suits.
| 1♣ | 1♥ |
| 1♠ | 2♦ |
| 3NT | ? |
| 4♣ | RKC in either ♥ or ♠, to that 4♦ is obligatory, to that 4♥is RKC in ♥, 4♠ is RKC in ♠ |
| 4♦ | RKC in opener's minor, now in ♣ |
| 4♥ | slam invit in ♥, otherwise we bid 4♥ to 1♠ with GF monocolor in ♥ |
| 4♠ | slam invit in ♠, otherwise we bid 4♠ to 1♠ with GF ♠ support |
| 4NT | quantitative slam invit, passable |
| 1♦ | 1♥ |
| 1♠ | 2♣ |
| 3NT | ? |
| 4♣ | RKC in either ♥ or ♠, to that 4♦ is obligatory, to that 4♥is RKC in ♥, 4♠ is RKC in ♠ |
| 4♦ | RKC in opener's minor, now in ♦ |
| 4♥ | slam invit in ♥, otherwise we bid 4♥ to 1♠ with GF monocolor in ♥ |
| 4♠ | slam invit in ♠, otherwise we bid 4♠ to 1♠ with GF ♠ support |
| 4NT | quantitative slam invit, passable |
Thos solution is also useful in parallel situations.