In BBO robot games using the Acol system, the robot plays the system described below.
You can click on any of the robot bids for an explanation, and pause your mouse over a bid you plan on making to see how your robot partner will understand it.
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Acol
with 4 card majors, weak NT, strong jump-shifts, strong artificial 2♣,
and weak 2♦/2♥/2♠. Standard leads and discards (3rd/5th
leads in a suit contract, 4th best in notrump, direct discards).
Open longest suit for both minor and major suit openings: 1♣/1♦/1♥/1♠.
11 HCP.
12-14 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.
Game
forcing: 18+ HCP and a game going hand.
Continuations:
2♦ relay (0-7 HCP) and everything else
natural, 8+ HCP.
20-22 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 ♣/♦.
5-9 HCP, no fit, non forcing.
4-10 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 10-12 HCP, balanced, no fit, invitational.
2NT
is Jacoby, showing at least game force, with at least 4-card fit.
Continuations:
partner rebids their shortness, if they have one.
Over
interference: a direct fit-jump over a major suit opening bid shows 3
or 4 trumps.
Jumps in opener’s suit are invitational, showing 4+ card fit and a game invite hand.
In response to a major suit opening bid, 3NT shows 12-15 HCP with no fit.
Promises
at least one 4-card major and an invitational hand.
With
4♥ and 4♠, respond 2♥ to Stayman.
2♦ is transfer to hearts.
2♥ is transfer to spades.
2♠ is
transfer to clubs.
3♣ is
transfer to diamonds.
2♦ relay (0-7 HCP) and natural follow-ups.
Respond
2♦ with 0-7 HCP. Other bids are
natural with 8+ HCP and at least 5 cards in the suit.
Promises at least one 4-card major, forcing to game.
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 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.
Regular Blackwood with standard responses. The 4NT bid is used to ask partner to reveal how many Aces they hold.
Responses are:
5♣ =
0 or 4 Aces
5♦ = 1 Ace
5♥= 2 Aces
5♠=
3 Aces.
A continuation of 5NT asks for Kings.
Responses are:
5♣ =
0 or 4 Kings
5♦ = 1 King
5♥= 2 Kings
5♠=
3 Kings.
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.
After opponents' overcall at the 1-level (1♦ or 1♥), doubling shows both 4-card majors 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.
2NT
always shows the two lowest ranking suits.
Over
a minor suit opening, bid 2 of this minor to show both majors.
Over a major suit opening bid, the cuebid shows the other major and an unspecified minor.
Double of opponents' 1NT is penalty. You think that opponents will go down.
2♣ overcall over opponents' 1NT is Landy, showing a two-suiter with at least 5/4 in the majors.
2♦/2♥/2♠ overcall over opponents' 1NT is natural.
Jump overcalls are preemptive.
A
jump fit shows length in the suit bid and a fit. Forcing.
Standard Smolen after 1NT or 2NT opening.
After 4th player's overcall with no jump, meaning of opener's double is standard support double, showing 3 cards in partner's response suit and nothing about strength.
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.