SPECIAL RULE FOCUS

3/6 Swap in Ngau Explained

The 3/6 swap is one of the most overlooked rules. When your hand includes 3 or 6, evaluating swap states can change both base validity and final hand strength.

What the Swap Means

In this calculator, every 3 and 6 card is evaluated in both states. If you have multiple swap-eligible cards, all combinations are checked so stronger legal outcomes are not missed.

Why It Matters

It can create a valid base where no valid base existed before.
It can improve point-hand outcomes after base validity is satisfied.
It can change which pair of cards should be used as point cards.

Practical Process

Identify all 3 and 6 cards in your hand.
Test base combinations using original values.
Test swapped states when no strong result appears.
Re-check point-card choices after each valid base.

Quick heuristic: if your base total is close to a multiple of 10, one 3/6 swap can often unlock a legal split.

Important Detail

Pair checks use the original face rank, so swap operations do not force different face ranks into an artificial pair.

Run 3/6 Swap Scenarios