Bridge-deal

Deal sample bridge hands based on a set of criteria.

Use

Usage:

Enter filter criteria in the editor
Press the "next" button, which is the right-arrow
Note the optimal outcome according to the double-dummy solver, and how many tricks can be made in each suit with optimal play.
Consider if the criteria are correct for the bids you want (discover new criteria for the filter)
Consider what your next bid will be

Filter language

Indentation

Indentation of spaces and tabs at the beginning of a line is ignored. It can be used to enhance readability.

Comments

Comments start with //, and disable processing of everything from those slashes to the end of that line.

Bids

Bids are unconditional, for all matching hands. Examples:

bid P
bid 1C!: 16+, artificial
bid X: Takeout
bid XX!

The ! after the bid means "Alert!". Everything after the colon, to the end of the line is a description of the bid.

Variables

You can set a variable with $var = text. Only text type variables are supported. Variables can only be used in bids, referenced with ${var}. Example:

$suit = C
bid 1${suit}: At least 3 ${suit}.

Weights

A weighting list is set with syntax such as %var = 4, 3, 2, 1.

Operators

Standard operators are <, >, <=, >=, and =.

Current Hand

Criteria always apply to a single hand. Set the current hand with north, south, east, or west. Case is ignored.

Suits

Supported suit names:

C: Clubs
D: Diamonds
H: Hearts
S: Spades
M: Hearts, Spades
m: Clubs, Diamonds
R: Clubs, Hearts,
r: Diamonds, Hearts
P: Diamonds, Spades
b: Clubs, Spades
X: Clubs, Diamonds, Hearts, Spades

Suit names can be combined, so 1CD is the same as 1m.

Criteria

A criteria set consists of one or more criteria parts, separated by commas. The current supported criteria parts are:

Suit holding: 6M (6H or 6S), 6+X (At least 6 of any suit), <2D (less than two diamonds), <=1D (O or 1 diamond), 4-5S (four or five spades).
Weight: Using a previously-declared weighting such as %points = 4, 3, 2, 1, you can check the weight of a suit with S%points > 3. This adds 4 if the hand's spade suit as the ace, 3 if it has the king, etc.
Suit length comparisons: Compare the length of two suits with S >= H (hand holds at least as many spades as hearts)
Distribution: Check for a specific shape with 5332 (5 spades, 3 hearts, 3 diamonds, 2 clubs), or check for unspecified-suit shape with any 4441 (one unspecified suit has a singleton, all the rest have 4).
Point count range: 11-13 means at least 11 high card points, at most 13.
Point count: 8 means exactly 8 high card points. 8+ means at least 8.
Balanced: balanced means no 5+ card major, no singleton, no void, not 5-4. balanced5 is the same, but allows for 5 card majors.
Specific cards: CAK means the club ace and the club king are both in the current hand.

Example:

%points = 4, 3
north
  13-15, 4414, D%points >= 3 // Either diamond ace or king
  bid 1N: Should we open these hands 1N?

Reject

Criteria starting with ! will discard any hand matching these criteria. Multiple rejections in a row are independent from one another, and all apply to the current state.