Have you ever wondered what Lia’s carding is?

Defending well in bridge isn’t only about finding the right lead or winning tricks – it’s also about communicating with partner. Lia, IntoBridge’s robot, uses a structured, partnership-style carding system to share information during the defense.

This article explains how Lia signals in both no-trump and suit contracts, including when she plays attitude, count, and suit preference, plus how she chooses discards.

Lia leads 4th best against No-Trump. Against suit contracts, she also leads 4th best in the basic systems, but switches to 3rd/5th best with the more advanced systems.

If you don’t want to dive too deep into the carding, here’s the quick summary:

The Big Picture: Lia’s Signalling Priorities

Lia does not “signal randomly.” She follows a hierarchy, and that hierarchy changes slightly depending on whether the contract is no-trump or a suit contract.

In No-Trump (NT), Lia’s priority is:
1. Attitude (only when partner leads A/K/Q)
2. Count (default most other times)
3. Suit preference (mainly on discards, or once count is known)

In Suit Contracts, Lia’s priority is:
1. Suit preference for ruffs (when setting up/asking for a ruff)
2. Suit preference (when dummy has a singleton and partner led that suit)
3. Attitude (possible, but rare and conditional)
4. Count (the default signal most of the time)

Suit preference on discards
A good way to think of it:
NT defense often revolves around “Do we run this suit?” → attitude matters a lot.
Suit defense often revolves around “Where is the shortness/ruff?” → suit preference becomes more important, and attitude is used less.

1) Attitude Signals (Encourage / Discourage)

What “attitude” means in Lia’s system
High card = encouragement (“I have interest / continue the suit”)
Low card = discouragement (“I have nothing / look elsewhere”)
When encouraging, Lia tries to play the highest card that does not cost a trick—she doesn’t donate tricks just to make a point.

Attitude in No-Trump
When Lia gives attitude in NT
Lia gives attitude when partner leads an honor:

Ace, King, or Queen (first round)
Exception: King as “power lead”
Some partnerships treat the King lead as an “unblock” request. If that agreement is on, and dummy has 2+ cards, Lia will:

Unblock if she holds an honor that must be released
Otherwise, she will give count
(That behavior depends on the partnership convention card settings.)

When does Lia encourage in NT?
Typical encouragement requirements are:

Partner leads Lia encourages with…
Ace Queen or King, or sometimes length (e.g., 4 cards when dummy has 3)
King Ace, Queen, or Jack
Queen Ace, King, Jack, or Ten
Example: Encouraging without wasting an honor
3NT, partner leads ♠A
Dummy: ♠742
Lia: ♠Q83
Lia encourages by playing ♠8 (high spot), not the queen.

Example: Discouraging
3NT, partner leads ♥A
Dummy: ♥J65
Lia: ♥842
Lia plays ♥2 to discourage.

Attitude in Suit Contracts (Used Much Less Often)
In suit contracts, Lia uses attitude only under specific conditions—mainly because counting and ruff-suit guidance are usually more valuable.

When Lia gives attitude in suit contracts
Attitude is considered only on the first round of a suit, when partner leads, and depends heavily on dummy’s length.

Main case: dummy has exactly three cards in the suit
Then Lia may give attitude when partner leads:

Ace (unless the Queen is in dummy)
King (unless it’s a high-level contract—slam, level 5+—or unless J/T is in dummy)
Queen (only if dummy plays the Ace, and dummy does not have the King)
Special case: dummy does not have exactly three cards
Attitude is very restricted: Lia gives attitude only when:

Ace is led in a suit other than the opening lead suit
and dummy has at least two cards in that suit
Example: Attitude (dummy has 3 cards)
4♠, partner leads ♥A
Dummy: ♥J105
Lia: ♥862
Lia discourages with ♥2.

Example: No attitude because dummy has the Jack
4♠, partner leads ♥K
Dummy: ♥J42
Lia: ♥1083
Here Lia switches to count (not attitude), playing ♥3 to show odd.

2) Count Signals (Even / Odd)

When attitude is not in effect, Lia’s default language is count.

How Lia signals count
High card = even number of cards (2, 4, 6…)
Low card = odd number of cards (3, 5, 7…)
This applies not only to original length, but also to remaining count where relevant.

Count in No-Trump: when does it apply?
Count is given when attitude does not apply, including:

First round when partner did not lead A/K/Q
Second round of a suit, especially if Lia was forced to play a particular card on the first round
Never if count has already been clearly shown in that suit
Example: Odd count in NT
3NT, partner leads ♠5, dummy plays ♠A
Lia: ♠Q82
Lia plays ♠2 → low = odd (3 cards).

Example: Even count in NT
3NT, partner leads ♥6, dummy plays ♥9
Lia: ♥8542
Lia plays ♥5 → high(ish) spot = even (4 cards).

Count in Suit Contracts: key differences
Lia gives count in most situations (because attitude is rare).
Lia does not give count in trumps.
Same high-even / low-odd structure.

3) Suit Preference Signals (Which Suit Do You Want Back?)

Suit preference is used when partner needs direction about which suit to switch to or return—especially when count/attitude are not the priority.

How Lia signals suit preference
When there are two clear candidate suits:

High card = preference for the higher-ranking suit
Low card = preference for the lower-ranking suit
Middle card = no preference / unclear / three suits possible
Suit preference in No-Trump
In NT, suit preference is mainly a discard tool, or used once count has already been shown in that suit.

Example (NT): Lia has already shown count in clubs, must follow again:
Holding includes ♣842 originally; later she plays ♣8 (high) to ask for the higher of the two side suits (e.g., hearts over diamonds).

Suit preference in Suit Contracts (Much More Important)
In suit contracts, suit preference shows up prominently in two classic defensive situations:

Dummy has a singleton and partner leads that suit
Giving partner a ruff (you lead a suit partner is void in; your card asks what to return after the ruff)
Example: Dummy singleton (request a return)
4♠, dummy has a singleton ♥
Partner leads ♥A, Lia follows ♥8 (high) to request the higher side suit return (e.g., diamonds rather than clubs).

4) Discarding: How Lia Chooses What to Throw Away

When Lia cannot follow suit, she discards with two goals:

Communicate (count or preference)
Protect the defense (don’t unguard honors or give declarer free information)
Which suit does Lia discard from?
Lia tends to discard from:

Long suits (4+ cards)

safer to shed spots
easier to show count without breaking critical holdings
Suits she does NOT want partner to lead

weak holdings
suits where dummy is strong
And she avoids discarding from:

honor-guarding suits
very short suits (where every card matters)
suits she wants partner to attack
holdings where discards would help declarer locate honors
What signal does Lia give on discards?
By default, Lia gives count on discards:

High discard = even
Low discard = odd
If count has already been given in that suit, she may switch to suit preference on later discards.

5) Can Lia Read Your Signals?

Yes. Lia tracks played cards and uses partner’s spots as evidence about distribution and suit direction.

But Lia’s trust is calibrated:

Partner is another Lia → signals are assumed consistent and are weighted heavily
Partner is human → signals are still used, but weighted less (humans may mis-signal, hesitate, or play “random” spots)
Practical takeaway: accurate signalling helps Lia defend better, even if she doesn’t follow it blindly.