Principle

Once a M fit is determined, we can indicate a 0 or 1 card in a suit on our way to game or slam. In general, you need to be strong, and possess:

- 0-card: use PING-PONG

------ next bid if still on 2-level

------ other M if on 3-level

- 1-card: jump to 4-level

- all COs but no 0/1: 3NT: "partner, start COs"

------ note: this generally requires being +2HPs stronger than progressing with a 0/1 card, since there's no extremities in the hand layout.

Examples

/ 1♠ - 2♠: 7-9(10), 3+♠

/ PASS: 12-15, NF

/ 3♠: 16-17, no 0/1, NF

/ 4♠: 18+, no 0/1, NF

/ 2NT: Swiss, PING (next bid), 0-card, 16+

- 3♣: PONG, which 0-card?

/ 3♦♥♠: 0-♦♥♣

/ 3♣♦♥: Swiss, 16+, 1-♣♦♥

/ 3NT: 18+, partner, start control (CO) bids

/ 1♠ - 2NT: 10+, 4+♠, F1

/ 3♠: (10)12-13, NF

/ 4♠: 14-15, no 0/1, NF

/ 3♣: 16-17, no 0/1, NF, "partner, do you have a 0/1 card?"

- 3♠: 10-11, no 0/1

- 4♠: 12-14, no 0/1

- 3♥: Swiss, PING, 0-card, 10+

/ 3♠: PONG

- 4♣♦♥: 0-♣♦♥

- 4♣♦♥: 1-♣♦♥

/ 3♦: 18-19, no 0/1, NF

idem / 3♣

/ 3♥: Swiss, PING, 14+

- 3♠: PONG

/ 4♣♦♥: 0-♣♦♥

/ 4♣♦♥: Swiss, 1-♣♦♥

(/ 3NT: partner, start control (CO) bids: normally not used, pass via 3♣♦ first to indicate HP level)

/1♠ - 3♠: barrage, 2-6, 4+♠

/ PASS: 12-17

/ 4♠: 18+, no 0/1, NF

/ 4♣♦♥: Swiss, 0/1 (ambiguous), 18+, F

(/ 3NT: partner, start control (CO) bids: normally not used, quite extreme after a barrage bid)

Implicit Swiss

/ 1♠

- 3♥: Swiss, PING, 12-15, 4+♠, 0-card (note: 16+: pass via -2NT first)

- 4♣♦♥: Swiss, 1-♣♦♥, 12-15

- 3NT: partner, start CO bids

Implicit Swiss with Bergen Raises

/ 1♠ - 3♣: 7-9(10), 4+♠

/ 3♦: relay, 16+, partner, are you max/min, and do you have a 0/1?

- 3♠: min, no 0/1

- 4♠: max, no 0/1

- 3♥: Swiss, PING, max, 0-card

/ 3♠: PONG

- 4♣♦♥: 0-♣♦♥

- 4♣♦♥: Swiss, max, 1-♣♦♥

/ 34♠: to play

/ 1♠ - 3♦: 10-12, 4+♠, unknown 0/1, MF

/ 3♥: obliged relay

- 3♠: Swiss, PING, 0-card

/ 3NT: PONG

- 4♣♦♥: 0-♣♦♥

- 4♣♦♥: 1-♣♦♥

Extra rules

If Swiss has been bid and a 0-card has been indicated, cards in this suit are NOT counted or announced anymore once we start using RKC.

If a 1-card is announced, the A is counted when RKCing, the K is not announced.

Swiss is impossible after the 4-th colour convention

In case of an ambiguous 0/1 (you're not sure if partner has a 0 or a 1 card), and later entering CO-bids, then a CO-bid in a previously announced 0/1 card now must imply a 0-card

Example:

/ 1♦ - 1♥ / 1♠ - 3♠: 10-11

/ 4♣: 0/1 ♣

- 4♦: ♦-CO, starting COs once a 0/1 has been announced

/ 4♥: a 1-card in ♣ and ♥-CO

/ 5♣: a 0-card in ♣ and ♥-CO

Notes on a fit in ♥

After a ♥ fit, often a 0 or 1 card in ♠ is ambiguous (cannot determine for certain if it is a 0 or 1 card). ♣♦ don't have this issue.

Caution

/ 1♥ - 2♠: Swiss, 0-card, PING

/ 1♠ - 3♥: Swiss, 0-card, PING

/ 1♣♦ - 2♥♠: 12+, 6+♥♠