Sparrow Mahjong

Three mahjong traditions, each with its own rules engine and its own real
scorer: Hong Kong Old Style, Chinese Official (MCR), and American with jokers
and the Charleston. Four players, a full wall, and a score at the end you can
check line by line.

This is not mahjong solitaire. It's the four-player game.

THREE COMPLETE RULE SYSTEMS
• Hong Kong Old Style — 144 tiles, chow/pung/kong claims, faan scoring with the
half-spicy payment table, sacred discard, kong robbing. Set the minimum at any
hand, 1 faan, or the classic 3.
• Chinese Official (MCR) — the full 81-fan competition table with the 8-point
minimum, seven pairs, knitted straights, honors-and-knitted hands.
• American — 152 tiles with eight jokers, the Charleston with blind passes, the
courtesy pass across, exposures, joker exchanges, and a browsable card of 56
hand patterns.

SCORING YOU CAN AUDIT
Every hand ends in a receipt naming each pattern that paid and what it paid.
Hong Kong and Chinese Official each carry a searchable card of every pattern
the scorer can award, generated from the rules your table is actually using —
so the limit hand prints your limit, and seven pairs appears only if you
switched it on.

A COACH, NOT A HINT BUTTON
American's Recommended Hands ranks the card against your rack and the table. A
hand whose last tiles are already in the discard pile ranks below one that's
still alive; a joker can't fill a pair; a concealed hand can't be claimed into.
Each suggestion shows how far off you are and what you're still short of.

OPPONENTS THAT DON'T CHEAT
Six bots across three difficulties, each with a temperament — call aggression,
defensive discipline, hand ambition. Harder bots weigh more; none of them see
more. Every decision is made from public information only: melds, discards,
wall depth. Seat one, two, or three of them.

PLAYABLE BY EAR
Every tile says its name wherever it's drawn — rack, river, meld, receipt. The
discard board tells you how deep the hand has got and what just landed, your
turn and the table's calls are announced as they happen, and the rack carries a
Discard action, so a hand can be played end to end with VoiceOver. Text follows
your iOS text size all the way through the accessibility sizes.

YOUR RECORD
Hand win rate, self-draws, deal-in rate, net points, best hand, win streaks,
favorite scoring patterns and a points-per-game chart — across all three
traditions, drilling down from any game to any hand's receipt.

Close the app mid-hand and it's waiting where you left it: same wall, same
rack, same score.

No ads, no accounts, no in-app purchases, and no network — it works on a plane.