Responder may inquire with 4D when holding at least 2 key cards and some prospects of slam, or make other descriptive slam tries, or sign off in opener's suit at the four level. After the inquiry, in auctions where specific holdings are shown, "strong" holdings (void and honour combinations) are shown naturally, and uncontrolled suits are shown in the order other-major, clubs, diamonds.
| 4D | Inquiry, showing at least two key cards | ||||
| 4H | Minimum requirements | ||||
| 4S | Better than minimum, unspecified void | ||||
| 4NT | Inquiry | ||||
| 5C/5D/5H | Club/diamond/spade void | ||||
| 4NT | Better than minimum, no void, all suits controlled | ||||
| 5C/5D/5H | Better than minimum, no void, no control in spade/club/diamond suit | ||||
| 5S | AKQxxxxx with two singletons and a KQx suit, or AKQxxxxx with one singleton and two Kx suits, or KQJxxxxx with two singletons and a AKx suit | ||||
| 5NT | Inquiry | ||||
| 6C/6D/6H | Club/diamond/spade suit with KQx, Kx or AKx respectively according to the hand type held for the 5S response | ||||
| 5NT/6C/6D | AKQxxxx and a spade/club/diamond suit of KQJx with two singletons, or AKQxxxx and a spade/club/diamond suit of KQx with a singleton and a Kx suit | ||||
| 6H | AKxxxxxxx, two singletons and a Kx suit | ||||
| 4H | To play | ||||
| 4S/4NT/5C | Spade/diamond/club void, slam interest and at least one key card | ||||
| 5D | Small doubleton trump, three side aces and possibly nothing else | ||||
| 5H | Small singleton trump, three side aces and nothing else |
Responder may inquire with 4H when holding at least 2 key cards and some prospects of slam, or make other descriptive slam tries, or sign off in opener's suit at the four level. After the inquiry, in auctions where specific holdings are shown, "strong" holdings (void and honour combinations) are shown naturally, and uncontrolled suits are shown in the order other-major, clubs, diamonds.
| 4H | Inquiry, showing at least two key cards | ||||
| 4S | Minimum requirements | ||||
| 4NT | Better than minimum, unspecified void | ||||
| 5C | Inquiry | ||||
| 5D/5H/5S | Diamond/heart/club void | ||||
| 5C | Better than minimum, no void, all suits controlled | ||||
| 5D/5H/5S | Better than minimum, no void, no control in heart/club/diamond suit | ||||
| 5NT | AKQxxxxx with two singletons and a KQx suit, or AKQxxxxx with one singleton and two Kx suits, or KQJxxxxx with two singletons and a AKx suit | ||||
| 6C | Inquiry | ||||
| 6D/6H/6S | Diamond/heart/club suit with KQx, Kx or AKx respectively according to the hand type held for the 5NT response | ||||
| 6C/6D/6H | AKQxxxx and a club/diamond/heart suit of KQJx with two singletons, or AKQxxxx and a club/diamond/heart suit of KQx with a singleton and a Kx suit | ||||
| 6S | AKxxxxxxx, two singletons and a Kx suit | ||||
| 4S | To play | ||||
| 4NT/5C/5D | Heart/club/diamond void, slam interest and at least one key card | ||||
| 5H | Small doubleton trump, three side aces and possibly nothing else | ||||
| 5S | Small singleton trump, three side aces and nothing else |