Description
After 1M (in a 5M system), 2NT shows 4+ (sometimes 3 good) card support and forces to game in that major. Opener's hand is in one of 3 strength ranges:- minimum (11-14 bad HCP) - opener bids 3♣,
- medium (14 good-16) - opener describes hand directly,
- maximum (17+) - opener bids 3♦.
- 3M: no shortness (after 3♦ rebid: 4♥=17-18, 4♠=19+),
- 3oM1: any void (after 3♦ rebid: always 3♠),
- 3NT: oM singleton,
- 4♣, 4♦: singleton.
After the 3♣ and 3♦ rebids, responder may also choose to describe his hand instead of asking opener, again using the same bids as above. Later on, all bids are cuebids, 4NT is RKC Blackwood.
Mnemonics: The 3oM/3NT rebids fit well in our system, we play 1M-3oM as "any void" splinter and 1M-3NT as "oM single" splinter. 4♣/4♦ are easy to remember as well. The rebids after 3♦-3♥ are shuffled around because of lacking space - it is not hard though to recall the meaning at the table if you remember the continuations after 3♣.
Sequences
| 1M | 2NT | Schmittberg - game force in M |
| medium hands: | ||
| 3M | no shortness | |
| 3oM | any void | |
| 3NT | oM singleton | |
| 4♣ | ♣ singleton | |
| 4♦ | ♦ singleton | |
| minimum hands: | ||
| 3♣ | any minimum | |
| 3♦ | asks - see above | |
| 4M | to play :) | |
| any | shows - see above | |
| maximum hands: | ||
| 3♦ | any maximum | |
| 3♥ | asks | |
| 4♥! | no shortness, 17-18 HCP | |
| 4♠! | no shortness, 19+ HCP | |
| 3♠! | any void | |
| 3NT | oM singleton | |
| 4♣ | ♣ singleton | |
| 4♦ | ♦ singleton | |
