In
BBO robot games using the SEF system, the robot plays the system
described below.
Open longest major suit if 5 cards or longer 1♥/1♠
Open longest minor suit if no 5+ card major: 1♣/1♦.
10 HCP.
15-17 HCP, can have 5-card major.
Natural, weak, 5-10 HCP and 6 good cards in the suit bid. Disciplined, with honors in the suit.
Strong
17-23 HCP.
Continuations:
2♦
relay.
Game
forcing: 16+ HCP and a game going hand.
Continuations:
2♥
negative (0-7 HCP) and everything else
natural, 8+ HCP.
20-21 HCP, balanced, no 5-card major.
Preemptive.
3NT opener is gambling, showing a solid 7-card minor with no outside Ace or King.
Preemptive.
Preemptive, two suiter with at least 5-5 in ♣/♦.
5-10 HCP, no fit, non forcing.
5-10 HCP, fit, non forcing.
10+ HCP, natural, forcing one round.
Jump-shifts over a 1st level opener show a strong hand (16+ HCP) and a good 6+ card suit, game forcing.
2NT is 10-11 HCP, balanced, no fit, invitational.
2NT is 9-11 HCP with 3 card support, invitational.
Jumps in opener’s suit are invitational, showing 4+ card (5 cards if ♣ ) and a game invitational hand.
In response to a major suit opening bid, 3NT shows 11-14 HCP with 4+ card support.
Promises
at least one 4-card major and an invitational hand.
With
4♥ and 4♠, opener responds 2NT to Stayman.
2♦ is transfer to hearts.
2♥ is transfer to spades.
2♠ is
transfer to clubs.
3♣ is
transfer to diamonds.
4♣
is a major 2 suiter with possibly longer spades.
4♦ is a major 2 suiter with possibly
longer hearts.
2♦ relay, with natural follow-ups.
2♥ negative (0-7 HCP) and everything else natural, 8+ HCP.
Promises at least one 4-card major, forcing to game.
3NT
response to Stayman shows exactly 4 hearts and 4 spades.
3♦ is transfer to hearts.
3♥ is transfer to spades.
3♠ is
transfer to clubs.
4♣ is
transfer to diamonds.
4♦ shows both majors, at least 5-5.
4♥/4♠ are natural, 6+ carder, weak, to play.
If opener has repeated his opening bid as second bid after a response and responder bids a new suit (a 3rd suit), this bid shows nothing about the suit named but makes the auction forcing.
If the first 3 bids have been made in 3 different suits, naming the 4th suit will be artificial. It makes the auction forcing and simply asks the opener to describe his hand.
Roman keycard blackwood with standard responses. The 4NT bid is used to ask partner to reveal how many keycards (the four aces and king of trump) they hold.
Responses are:
5♣ =
0 or 3 Keycards.
5♦ = 1 or 4 Keycards.
5♥= 2 Keycards without the Queen
of Trump.
5♠= 2 Keycards with the Queen of Trump.
A continuation of 5NT asks for Kings.(not counting the king of trump).
Responses are:
5♣ =
0 or 3 Kings.
5♦ = 1 or 4 Kings.
5♥= 2 Kings without the queen of
trump.
5♠= 2 Kings.with the queen of trump.
A
jump (or a double jump) shows a shortness (void or singleton) in the
suit in which the jump is made and a fit in the last suit named by the
partner.
Standard
Smolen after 1NT or 2NT opening. After a 2♦
response by 1NT opener, denying a 4-card major, responder jumps to the
three-level in their shorter major, therby showing five cards in the
other major. For example, after 1NT (P) 2♣ (P) 2♦, responder's 3♥
bid shows exactly 4 hearts and 5 spades, with a game going hand.
After 4th player's overcall with no jump, opener's double shows a better than opening hand and does not promise support for partner's bid suit.
After opponents' overcall at the 1-level (1♦ or 1♥), doubling shows 4 hearts over 1♦ and exactly 4♠ over 1♥.
After a takeout double, the fit at the 3 level becomes very weak and the invitational bid becomes 2NT.
All-natural.suits
at the 2 level.
2NT is transfer to clubs.
3♣ is transfer to diamonds.
3♦ is transfer to hearts.
3♥ is transfer to spades.
Double
of opponents' 1NT shows a 4 card major and a 5+ card minor suit.
2NT
jump overcall always shows 5-5 distribution or better in the two lowest
ranking
suits.
Over
a minor suit opening, 2♦ shows 5-5 in
the majors.
Over a major suit opening bid, the cuebid of that suit shows 5 of the other major and and 5+ clubs.
Over a major suit opening bid, 3♣ shows 5 of the other major and 5+ diamonds.
4NT over a minor suit opening shows a 2 suiter with the other minor and a major.
Leaping
Michaels: Over a weak 2♥ or 2♠
opener, a 4 level minor jump overcall shows a two suiter with that
minor and the unbid major.
2♣ overcall over opponents' 1NT shows a two-suiter with at least 5/4 in the majors.
2♦ overcall over opponents' 1NT shows a six card major.
2♥ overcall over opponents' 1NT shows 5 hearts and a 4+ card minor.
2♠ overcall over opponents' 1NT shows 5 spades and a 4+ card minor.
2NT
overcall over opponents' 1NT shows 5+ in both minors.
X of opponents' 1NT shows a 4 card major and a 5 card minor.
Over a minor suit opening, a cuebid of that minor at the 3 level shows a long running suit in the other minor and requests partner to bid 3NT with a stopper in opener's minor
Other jump overcalls are preemptive.
A
jump fit shows length in the suit bid and a fit. Forcing.
3rd/5th
leads in a suit contract, 4th best in notrump.
Direct attitude signal, with high encouraging and low discouraging.
On the first suit played by declarer, robot gives "count" (if it holds
at least 2 small cards).
On the first round of a suit (by following suit or discarding), robot
gives count in the suit if they cannot play higher, there is no case of
unblocking and they hold at least 2 small cards.
In notrump, with an honour-third, robot leads the second card.
In a suit contract, robot gives upside-down count in the trump suit.
In a suit contract, with 4 small cards, robot leads the second one and
the third one with an honour.