When is a player legally permitted to execute a Blind Pass?

Under official NMJL rules, a Blind Pass (passing 1, 2, or 3 tiles without looking at them) is permitted ONLY on the final pass of each Charleston: the 3rd pass of the First Charleston (Pass Left) and the 3rd pass of the Second Charleston (Pass Right).

Can any single player stop the Second Charleston?

Yes! The Second Charleston is strictly optional. If even one player at the table announces 'STOP', the Second Charleston is immediately cancelled and play advances directly to the optional Courtesy Pass.

Why is it dangerous to pass two matching numbers in the same pass?

Passing matching numbers or adjacent sequence tiles hands the receiving opponent an instant pair or run foundation, dramatically accelerating their path to Mahjong.

What should I do if I am dealt fewer than three throwaways at the start?

Never break natural pairs. In the first pass (Pass Right), pass your 1 or 2 weakest isolated single tiles alongside your least synergistic dragon or wind. In the 3rd pass (Pass Left), use the legal Blind Pass to protect your hand.

Is the Courtesy Pass mandatory?

No. The Courtesy Pass (the final exchange between players sitting across from each other) is completely optional and must be mutually agreed upon. Players can agree to exchange 0, 1, 2, or 3 tiles.

Defense & Tactics • April 12, 2026 • 9 min read

Charleston Defense: How to Spot Danger Passes and Stop Feeding Opponents

By Mahjong Handbook Strategy Desk

American Mahjong is distinguished from all other worldwide tile variants by a foundational opening ceremony: The Charleston. Before a single discard touches the table felt, between 6 and 18 tiles are systematically exchanged between the four players.

While novice and intermediate players dedicate 100% of their attention to what they hope to receive, master tournament tacticians focus equally on what they are passing away. Reckless passes during the Charleston hand opponents ready-made Pungs, Kongs, and pair foundations on a silver platter.

1. The Danger Matrix: Never Pass "Like Numbers" or Paired Connectors

The single most prevalent defensive error at casual tables is passing synergistic clusters in a single 3-tile pass—such as a 3-Dot, 4-Dot, and 5-Dot, or two matching Dragons alongside a Flower.

The Golden Separation Rule: Never pass two tiles of the identical suit that can form a natural consecutive run, pair, or Like Number meld to the same recipient in the same exchange. Split your discards across different rounds.

2. Table Radar: Reading "Suit Currents" Across the Table

During the First Charleston, scrutinize incoming tiles with detective-level precision. If your right-hand neighbor consistently delivers heavy Dots, they are shedding that suit to construct a Bam or Crak monochrome or bicolor hand. Do NOT pass Bams or Craks back to them in subsequent passes.

3. The 3rd Pass Blind Pass Defense (The 1-2-3 Tile Steal)

Under official NMJL tournament rules, on the 3rd pass of the First Charleston (Pass Left) and the 3rd pass of the Second Charleston (Pass Right), a player is legally allowed to execute a Blind Pass of 1, 2, or 3 uninspected incoming tiles. If you hold only one or two genuine throwaways, use the Blind Pass rather than breaking an organic pair.

4. The Second Charleston Stop Protocol: Mathematical Cold Calculation

The Second Charleston is 100% optional. Any single player at the table has the sovereign right to halt the Charleston by declaring "STOP." If you hold 9 or more tiles aligning with a viable 2026 card line and have 2 or fewer safe throwaways, call STOP immediately.

5. Passing Flowers and Winds: The Late-Round Minefield

Passing Flowers during the Second Charleston or Courtesy Pass is extraordinarily hazardous, as opponents have solidified their racks. In the late passes, favor passing isolated Winds over middle numbers (4, 5, 6), which easily slot into consecutive runs.

Frequently Asked Questions

When is a player legally permitted to execute a Blind Pass?: Under official NMJL rules, a Blind Pass is permitted ONLY on the final pass of each Charleston: the 3rd pass of the First Charleston and the 3rd pass of the Second Charleston.
Can any single player stop the Second Charleston?: Yes! The Second Charleston is strictly optional. If even one player announces 'STOP', it is cancelled immediately.
Why is it dangerous to pass two matching numbers in the same pass?: Passing matching numbers or adjacent sequence tiles hands the receiving opponent an instant pair or run foundation.