Box O1A
(Version 1.0)
| Opening, Overcalling and Doubling
|
Bid
| Meaning
| Forcing?
| Where to next?
|
Pass
| Hand does not satisfy any of the criteria below.
| NF
| -
|
One of a Suit
| Five or more cards, 8-16 HCP (and 'Bad Seventeens'), Rule of 18 compliance, no suit quality necessary, and no longer suit.
| NF
| Box R1A
|
1NT
| 11-16 HCP (and 'Bad Seventeens') and no suit longer than four cards. It does not require a stopper in any enemy suit(s). A distribution of 4-4-4-1 is fine.
| NF
| Box R1B
|
Two of a Suit
| Six or more cards, 3-16 HCP, no suit quality necessary, and no longer suit.
| NF
| Box R1C
|
Three of a Suit
| Four or more cards, 17-22 HCP (excluding 'Bad Seventeens'), and no longer suit.
- Bad Seventeens are flat 17 HCP hand containing five or more losers, which should be opened at the one-level.
| NF
| Box R1D
|
2NT
| 23+ HCP, any shape.
| GF
| Box R1E
|
Double
| 8+ HCP. "I had an opening bid, but the opponent's bid to my right just took it away." (To be used against all except their strong bids.)
| NF
| Box R1F
|
Box R1F
(Version 1.0)
| Responder's bid when responding to a 1st-round Double
|
Doubler's Bid
| Responder's Bid
| Meaning
| Forcing?
| Doubler's Rebid
| Meaning
| Forcing?
| Responder's Rebid
| Meaning
| Forcing?
|
Double of One of a Suit
| One of a Suit
| 5+ card suit, 8-16 HCP, compliant with Rule of 18
| NF
|
|
| NF
|
|
| NF
|
Two of a Suit
| 6+ card suit, 3-16 HCP
| NF
|
|
| NF
|
|
| NF
|
Three of a Suit
| 4+ card suit, 17-22 HCP
| F
|
|
| NF
|
|
| NF
|
1NT
| 0-9 HCP, no other bid available
| NF
|
|
| NF
|
|
| NF
|
2NT
| 10+ HCP, 4+ cards in at least one of the suits that doubler might have
| NF
|
|
| NF
|
|
| NF
|
Pass
| "I would have bid 1NT if RHO had not bid immediately after partner's Double."
| NF
|
|
| NF
|
|
| NF
|
Double
| "RHO's bid immediately after partner's Double has taken away the bid I was going to make, which was not 1NT."
| F
|
|
| NF
|
|
| NF
|
Double of Two or Three of a Suit
or of 1x:2x, 1x:3x, 2x:3x, 1x:2NT or 2x:2NT
| Suit bid at cheapest level
| Up to 11 HCP, 4+ card suit
| NF
|
|
| NF
|
|
| NF
|
Jump-bid of a new suit
| 12-14 HCP, 5+ card suit
| NF
|
|
| NF
|
|
| NF
|
3NT
| 14+ HCP, stopper in their suit(s)
| NF
|
|
| NF
|
|
| NF
|
Double of 1NT
| Suit bid at cheapest level
| Up to 11 HCP, 4+ card suit
| NF
|
|
| NF
|
|
| NF
|
Jump-bid of a new suit
| 12-14 HCP, 5+ card suit
| NF
|
|
| NF
|
|
| NF
|
3NT
| 14+ HCP, stopper in their suit(s)
| NF
|
|
| NF
|
|
| NF
|
'Negative' Double of RHO's Overcall
e.g. 1♦:(1♥):Dbl:(Pass)
| Suit bid at cheapest level
| Up to 11 HCP, 4+ card suit
| NF
|
|
| NF
|
|
| NF
|
Jump-bid of a new suit
| 12-14 HCP, 5+ card suit
| NF
|
|
| NF
|
|
| NF
|
3NT
| 14+ HCP, stopper in their suit(s)
| NF
|
|
| NF
|
|
| NF
|
Box R1A
(Version 1.0)
| Responding to One of a Suit (1♣, 1♦, 1♥, 1♠)
|
Bid
| Meaning
| Forcing?
| Where to next?
|
Pass
| 0-7 HCP and less than 3-card support for partner's suit
| NF
|
|
Double
| Unable even to bid 1NT. RHO's overcall has taken his bid away.
| NF
| Box O2A
|
One of a New Suit
| 5+ cards, 8-16 points, compliant with Rule of 18.
| NF
| Box O2B
|
1NT
| 8-16 HCP and no other available bid — i.e. the 'dustbin' bid. The hand will contain fewer than four cards in opener's suit. The hand may contain four cards in another suit, or a 5-card suit not now biddable at the 1-level.
| NF
| Box O2B
|
Two of a New Suit
| 6+ cards and 3-16 points
| NF
| Box O2B
|
Raise to Two of the Suit
| 3-card support and 0-9 HCP
| NF
| Box O2C
|
2NT
| 4+ card support and 10+ HCP
| F
| Box O2B
|
Three of a New Suit
| 4+ cards and 17+ HCP
| GF
| Box O2B
|
Raise to Three of the Suit
| 4-card support and 0-9 HCP
| NF
| Box O2D
|
Raise to Four of the Suit
| 5-card support and 0-9 HCP
| NF
| Box O2E
|
Raise to Five of Opener's Minor
| 6+card support and 0-9 HCP
| NF
| Box O2F
|
Simplex Principles of 1st Round Responses to One of a Suit
|
- PRINCIPLE 6: If Opener/Overcaller rebids his suit on the second round, this shows a suit longer than the five cards originally promised. A simple rebid — e.g. 1♥ then 2♥ — shows a 6-card suit. A jump rebid — e.g. 1♣ then 3♣ — shows a 7-card suit. (NB This principle is not enforced if responder showed a strong hand in the first round — i.e. 2NT, 3x, or 4NT.)
- PRINCIPLE 7: No extra values are needed to bid any 4+ card suit at the two-level on the second round. There is no concept of a 'barrier' or a 'reverse'.
- PRINCIPLE 9: Simplex is a fundamentally natural bidding system. The only gadgets used are 2♣ Redshift, 4NT Blackwood, and the Simplex 2NT.
- PRINCIPLE 12: After a suit-raise by partner — e.g. 1♦:2♦ or 1♥:3♥ or 1♠:4♠ or 1♣:5♣ — do not bid on. That is, unless the opponents are trying to steal your contract and you have extra suit length beyond the five cards your initial bid promised.
- PRINCIPLE 20: After opening/overcalling One of a Suit or 1NT or doubling on the first round, you can bid another 4+ card suit at the 2-level on the second round, even if responder passed.
- PRINCIPLE 21: If you had a hand worth opening at the 1-level and you have another 5+ card suit, you should bid it at the 3-level on the second round, even if responder passed.
- PRINCIPLE 26: After the second round, your doubles are for penalties — do not double purely because RHO has just taken your bid away.
- PRINCIPLE 28: 2NT in reply to a suit bid is always the Simplex convention. 2NT in reply to 1NT is always quantitative, showing 12-14 HCP balanced.
- PRINCIPLE 33: A double on the second round is often for takeout, particularly if bid by someone who also doubled on the first round, in which case partner is asked to bid his best of the unbid suits. A double of a conventional bid is likely to show that doubler has that suit.
|
Box O2B
(Version 1.0)
| Opener's Rebid after opening One of a Suit (1♣, 1♦, 1♥, 1♠)
|
Responder's Bid
| Opener's Rebids
| Meaning
| Forcing?
| Where to next?
|
One of a New Suit
| Pass
| Minimum opening hand (i.e. 8-12 HCP), little support for responder, no other 4+ card suit.
| NF
|
|
One or Two of a New Suit
| 4+ card suit.
| NF
|
|
1NT
| 11-16 HCP and fairly balanced with a 5-card suit.
| NF
|
|
Rebid of Opener's original suit at the 2-level
| 6-card suit.
| NF
|
|
Raise Responder's suit to the 2-level
| 3-card support and less than 10 HCP.
| NF
|
|
2NT
| The Simplex 2NT: 10+ HCP and 4+ card support for Responder's suit.
| NF
|
|
Rebid of Opener's original suit at the 3-level
| 7+ card suit.
| NF
|
|
Raise Responder's suit to the 3-level
| 4-card support and less than 10 HCP.
| NF
|
|
Raise Responder's suit to the 4-level
| 5-card support and less than 10 HCP.
| NF
|
|
Raise Responder's minor to the 5-level
| 6-card support and less than 10 HCP.
| NF
|
|
1NT
| Pass
| 8-10 HCP and a 5-3-3-2 shape.
| NF
|
|
Rebid of Opener's original suit at the 2-level
| 6-card suit.
| NF
|
|
Two of a New Suit
| 4+ card suit.
| NF
|
|
2NT
| 12-14 HCP, balanced or semi-balanced.
| NF
|
|
Rebid of Opener's original suit at the 3-level
| 7+ card suit.
| NF
|
|
3NT
| 15+ HCP, balanced.
| NF
|
|
Two of a New Suit
| Pass
| Minimum opening hand (i.e. 8-12 HCP), little support for responder, no other 4+ card suit.
| NF
|
|
Two of a New Suit
| 4+ card suit.
| NF
|
|
Rebid of Opener's original suit at the 2-level
| 6-card suit.
| NF
|
|
2NT
| The Simplex 2NT: 10+ HCP and 4+ card support for Responder's suit.
| NF
|
|
Raise Responder's suit to the 3-level
| 3-card support and less than 10 HCP.
| NF
|
|
New Suit at the 3-level
| 5+ card suit.
| NF
|
|
Rebid of Opener's original suit at the 3-level
| 7+ card suit.
| NF
|
|
Raise Responder's suit to the 4-level
| 4-card support and less than 10 HCP.
| NF
|
|
Raise Responder's minor to the 5-level
| 5-card support and less than 10 HCP.
| NF
|
|
2NT
| Rebid of Opener's suit at the 3-level
| Up to 13 HCP.
| NF
|
|
Cue-bid of cheapest 1st-round control
| 14+ HCP.
| F
|
|
Three of a New Suit
| Rebid of Opener's original suit at the 3-level
| Minimum opening hand (i.e. 8-12 HCP), less than 4-card support for responder, no other 4+ card suit biddable at the 3-level.
| NF
|
|
Three of a New Suit
| 4+ card suit.
| NF
|
|
3NT
| Balanced, preferably with the other two suits stopped.
| NF
|
|
Rebid of Opener's original suit at the 4-level
| 6+ card suit.
| NF
|
|
Raise Responder's suit to the 4-level
| 3+ card support and 8-12 HCP.
| NF
|
|
4NT
| Blackwood: 13+ HCP.
| NF
|
|