Build an auction and see what each call means in 2/1 Game Force, SAYC, Acol, Precision and Polish Club.
The same bid can mean different things in different bidding systems. For example, a 1NT opening shows 15-17 HCP in 2/1 and SAYC, but 12-14 HCP in Acol. To learn each system, read the bidding systems guide. When you hold a hand and need a call, use What Should I Bid?
Dealer
Vulnerability
Build the auction
Click the calls in order. Click a call in the auction to see what it means.
No calls yet. N deals and calls first.N: ?
Hover a call to see what it would mean
Meaning in every system
Build an auction above. The meaning of the selected call in each system shows here.
One system in detail
Select a system to see what each player has shown and the meaning of every next call.
What each player has shown
NNext to call
Nothing shown yet
E
Nothing shown yet
S
Nothing shown yet
W
Nothing shown yet
Next calls for N
Click a call to add it to the auction.
The meanings come from the EPBot bidding engine and the convention card of each system. Your own partnership agreements can be different.
Do you have a hand? Ask what to bid
Enter your 13 cards and the auction. The engine gives the next call in the system that you select.
Each call in an auction has an agreed meaning in the bidding system of the partnership. A call can show a range of high card points (HCP), the length of one or more suits, or an artificial message, for example a question to partner. The same call can have different meanings in different systems.
♥︎
Why does the same bid mean different things in different bidding systems?
Each system divides the hands in a different way. A 1NT opening shows 15-17 HCP in 2/1 and SAYC, but 12-14 HCP in Acol. In Precision, 1♣ is an artificial strong opening with 16+ HCP. In Polish Club, 1♣ can be a weak balanced hand, a hand with clubs or a strong hand. 2/1 and SAYC are also different: after 1♠, a 2♣ response is game forcing in 2/1, but forcing for one round only in SAYC.
♦︎
Where do the meanings come from?
They come from the EPBot bidding engine, which runs in your browser with the convention card of each system: 2/1 Game Force, SAYC, Acol, Precision and Polish Club. The engine is reliable in standard auctions. In long competitive auctions, its description can be different from what a human expert expects.
♣︎
What are the HCP and suit length ranges?
After each call, the engine narrows the ranges of the player who made it. Select a system to see the HCP and suit length ranges of each player after the full auction, and the meaning of each possible next call.
♠︎
Can I share an auction?
Yes. The page address keeps the auction, the dealer, the vulnerability and the system. Copy the address and send it, and the same auction opens for the reader.