Setup
4 players, each dealt 13 cards. Players privately arrange their cards into 3 rows: front 3 cards, middle 5 cards, back 5 cards.
Rule
Back must rank ≥ middle. Front (3 cards) uses pair/high-card rules only — no straights or flushes.
Scoring
After everyone is ready, hands are compared pair by pair, row by row. Each row won = 1 point. Winning all 3 rows against an opponent = 4 ('Sweep').
Bonuses
Common Vietnamese bonuses (Cù Lũ, Đồng Hoa, etc.) can be enabled in a later release; v1 ships with simple per-row scoring only.
Settlement
Points × room entry = gold transferred. ELO updated based on overall score swing.