According to XYZ: 1C -1D 1N-3D=Very good D, game forcing. The approach can be this way: 1C -1D 1NT-3D 3H-3S 3N/4C-4D/4NT ... The West can count to 13 tricks.
2. Game forcing sequences Any jump rebid by responder (except 3♣ preemptive) is Game Forcing and shows a good suit. By any jump rebid, we mean: responder jumps (rebid) in his own suit; responder jumps (rebid) in support of opener’s suit; responder jumps (rebid) in a new suit.