How Many Suits Does an NMJL Hand Use?

An NMJL hand uses one, two, or three numbered suits according to the color relationships printed on that line of the card. The colors do not permanently mean cracks, bams, or dots: one color means one suit, two colors mean two different suits, and three colors mean all three suits.

Once you read colors as placeholders, you can test every legal suit assignment without guessing from the ink itself. Players still need the current NMJL card to choose and verify an actual hand.

Start with colors, not tile artwork

The three numbered suits in American Mah Jongg are cracks, bams, and dots. On an NMJL card line, the printed colors tell you whether groups belong to the same suit or different suits.

Use this translation:

Do not assume red ink means cracks, green means bams, or blue means dots. Color shows a relationship within that line, not a fixed tile-suit legend for the entire card.

How do you map a one-color hand?

A one-color line is the simplest case: every numbered group printed in that color must use the same suit. You may assign that suit to cracks, bams, or dots, provided every suited group follows the choice.

For a generic pattern with three numbered groups all printed in one color:

1. Try all three groups as cracks.
2. Try all three groups as bams.
3. Try all three groups as dots.
4. Compare each version with the tiles on your rack.

You may not start the first group in cracks and change the last group to dots. That would turn a one-color relationship into two suits and would no longer match the line.

How do you map a two-color hand?

A two-color line requires two different suits. Every group in color A uses one suit, and every group in color B uses another. The order matters because your rack may support one assignment much better than its reverse.

There are six ordered assignments to test:

• Color A = cracks; color B = bams
• Color A = cracks; color B = dots
• Color A = bams; color B = cracks
• Color A = bams; color B = dots
• Color A = dots; color B = cracks
• Color A = dots; color B = bams

Suppose a generic line shows two numbered groups in color A and one numbered group in color B. If your rack has strong crack support for the color-A numbers and useful dots for the color-B number, test A as cracks and B as dots. If the reverse assignment would require several unavailable tiles, reject it quickly.

A common beginner error is making both colors the same suit. Different printed colors require different suits, so that interpretation is not legal.

How do you map a three-color hand?

A three-color line uses all three numbered suits. Assign one printed color to cracks, one to bams, and one to dots. No two colors may share a suit.

Again, there are six possible arrangements. Rather than reciting them blindly, anchor the color with the strongest group first:

1. Find the color group best supported by your rack.
2. Assign it to the matching suit in your tiles.
3. Test the remaining two colors in the two possible orders.
4. Count how many exact tiles each arrangement still needs.

For example, if color A has the largest repeated group and your rack already holds several matching bams, assign A to bams. Then compare B-as-cracks/C-as-dots against B-as-dots/C-as-cracks. This reduces six possibilities to two useful checks.

What should you count as a suit?

Count only cracks, bams, and dots as numbered suits. Flowers, winds, and dragons are not additional suits. Their presence does not turn a one-suit hand into a two-suit hand.

Keep these distinctions clear:

• Flowers are a separate tile category, not a fourth suit.
• Winds are honors, not numbered suits.
• Dragons are honors. When a line requires a dragon related to a numbered suit, follow the current card's notation and rules for that line.
• Zeroes on the NMJL card are white dragons, often called soaps; they do not create another numbered suit.

This is why it is more precise to say a hand uses “two numbered suits plus flowers” than to count flowers as a third suit.

A 30-second suit-reading routine

Before committing to a line, run this quick check:

1. Circle the suited groups mentally. Ignore flowers and honors for the suit count.
2. Count distinct printed colors. That gives the number of numbered suits required.
3. Assign suits consistently. The same color stays the same suit throughout the line.
4. Enforce differences. Different colors must use different suits.
5. Test every realistic assignment. Compare exact numbers and group sizes with your rack.
6. Keep a backup. Favor an alternative line that preserves many of the same useful tiles.

This routine turns “the colors confuse me” into a small matching problem. It also helps you notice when a tempting group on your rack supports the numbers but violates the line's suit relationship.

How Bird Bam helps at the table

Suit mapping happens on the NMJL card, while scorekeeping happens after the hand. Bird Bam helps groups keep scores, hands, and games organized so players can spend less table time managing paper records and more time reading the card and playing together.

Bird Bam does not replace the current NMJL card. If your group wants cleaner scorekeeping alongside card-based play, Bird Bam is a simple iOS companion for American Mah Jongg.

Frequently asked questions

Does red always mean cracks on the NMJL card?

No. A printed color identifies which groups use the same suit and which use different suits. It is not a permanent assignment to cracks, bams, or dots.

Can two different colors represent the same suit?

No. Within a line, different colors represent different numbered suits. If a line has two colors, use two different suits; if it has three, use all three.

Do flowers count as a suit?

No. The numbered suits are cracks, bams, and dots. Flowers are a separate tile category, as are winds and dragons.

How many ways can a two-color line be assigned?

Six ordered assignments are possible because the first color can be any of three suits and the second color can be either of the two remaining suits. Test the assignments against your rack rather than assuming the card colors name specific suits.