Mahjong

Playing Mahjong Properly

Mahjong is a four-player tile-based game that most people learn wrong. They memorize hand patterns from a card and then try to force those hands every round. That approach works sometimes and loses constantly. The actual game is about reading discard information, managing risk across four rounds, and knowing when a mediocre hand is better than chasing a high-value one. I started playing riichi mahjong about six years ago at a university club in Seoul. We played with actual Japanese tournament rules, not the simplified variant most apps use. The first thing I learned was that speed matters less than shape efficiency. Your initial 13 tiles rarely form a complete hand. What matters is how you process incoming tiles and when you commit to a direction.

The Riichi System in Mahjong

Riichi is the declaration you make when you are one tile away from winning and choose to stay closed. You place 1,000 points as a bet, lay down a stick representing the winning tile, and then draw and discard exclusively from the wall. This locks your hand. You cannot call chi, pon, or kan after declaring riichi. The upside is that riichi counts as a yaku, which means you win even with a minimal hand composition. The downside is that once you declare, you must win or lose exactly what comes. There is no undoing it. Here is a specific problem I ran into during a tournament match. I was two points behind in third place with three rounds remaining. I had a nearly complete hand and declared riichi. On my sixth discard after the declaration, I accidentally flipped my mahjong stick instead of placing it vertically. In riichi rules, that is a foul call. The opponent who would have won that tile got it, and I lost the round regardless. The workaround is simple but something nobody warns beginners about: always keep your riichi stick positioned horizontally across your designated area before you touch any tiles. I started doing this and stopped making that mistake entirely. Most online platforms automate the riichi declaration with a button press, so this issue does not come up in casual play. But understanding the physical gesture matters if you ever sit at a real table. The tile placement tells everyone at the table exactly what your hand state is. It is part of the information warfare.

Why Your Hand Value Calculations Are Probably Wrong

Fanshan (hans) is the point system that determines hand worth. Beginners count yaku and stop there. Advanced players count fu, then calculate han, then check for aomen (under-the-wall) tiles that might change everything. A hand with two yaku but zero fu is worth dramatically less than a hand with one yaku and high fu. This is not obvious from reading a rules summary. Consider this: a Chiitoitsu hand (seven pairs) has a fixed 25 fu and always counts as two han minimum. Most players do not realize that building Chiitoitsu can be faster and more reliable than building a standard menzen hand in certain situations. The hand completes with any seven pairs, which gives you more flexibility in what tiles to chase. However, Chiitoitsu cannot call pon, which means you lose access to one of the fastest hand-building tools in the game. I played a hand recently where I had four pairs already and was discarding safely toward Chiitoitsu. My opponent declared riichi on what looked like a standard closed hand. I drew a tile that completed my seven pairs. I won with tsumo, and because it was a closed hand with Chiitoitsu plus the riichi dealer bonus, the point transfer was roughly 8,000 points in my favor. That single hand shifted the entire match standing. I had been playing safe across three previous rounds and that one aggressive pivot recovered everything.

Dora Management and When to Ignore It

Dora indicators show the next tile in the dead wall. That tile becomes a dora when drawn. Dora adds one han per indicator tile in your completed hand. Five dora in a hand makes it a much stronger winner. Most players chase dora aggressively. This is usually a mistake. The counter-intuitive truth is that dora chasing slows your hand progress. Every tile you keep for dora value instead of shape efficiency costs you one or two turns. In riichi mahjong, losing two turns against an opponent who is already tenpai is often the difference between winning and getting beaten. I have seen players build massive dora-heavy hands that never complete because they spent too many turns chasing bonus tiles instead of improving their draw efficiency. There is one situation where dora chasing is correct: when you are in last place with one round remaining and need at least 4,000 points to catch the leader. In that scenario, the dora han push is mathematically justified because the alternative is accepting the loss. Outside of that specific case, focus on shape and speed.

Reading Opponent Discards

Discard reading is the skill that separates competent players from everyone else. The basic rule is simple: if a player discards a safe tile early in the round, they probably do not need anything around that area of the tile spectrum. If they hold a tile until late in the round and then discard it, they likely needed something adjacent and were waiting for the right moment. A specific pattern I track closely is the "mid-game safe discard." When a player who has been aggressive suddenly starts discarding middle-suited tiles like 5-man or 5-pin in round three or four, they are usually signaling that their hand has either completed or they have folded entirely. In either case, those middle tiles are genuinely safe for you to play. I use this pattern to decide when to continue attacking versus when to switch to defense. The transition point is usually round four for most hands. The limitation of discard reading is that it only works reliably against players who follow basic conventions. Against someone using a custom or mixed strategy, your reads become noise. I have played against a few regulars who deliberately discard in misleading patterns to trap readers. The counter-strategy is to note which players are reading opponents and adjust your own discard timing accordingly. If someone is clearly reading your discards, vary your discard sequence by one or two turns to throw off their timing calculations.

When to Fold and How to Do It

Folding is the hardest skill to develop in Mahjong. Most players fold too late. The standard heuristic is: if an opponent declares riichi and you have no hand value approaching theirs, you should switch to complete defense immediately. Do not wait to see if your next draw improves things. By the time your hand improves, the riichi player has already won or forced a draw. Complete defense means identifying the safest tile in your hand and playing only that tile until the riichi player's turn ends or they go out. The safest tile is usually a tile that has already appeared three times in the discard pool, or a tile from a suit the riichi player has not shown interest in. I track discarded tiles in my head by suit group rather than individual numbers. This speeds up my safe-tile identification from about three seconds to under one second, which matters in fast rounds. The downside of aggressive folding is that you concede points consistently. Over a full session, players who fold too late lose significantly more than players who fold too early. The middle ground is to fold when your estimated hand value is below 2,000 points and the opponent has declared riichi with a known yaku count of two or more. This threshold is not absolute but it works across most common situations.

Platform Recommendations

For digital play, the two most reliable options are Tenhou and Mjai.ai. Tenhou has a strict ranking system and enforces riichi tournament rules without deviations. Mjai.ai is free, runs in a browser, and includes detailed statistics tracking for every hand. I use Mjai.ai for practice and Tenhou for rated matches. The statistics from Mjai.ai show your win rate by yaku type, your average han per hand, and your discard reading accuracy, which helps identify which part of your game needs work. Avoid mobile apps that advertise Mahjong as casual entertainment. They simplify the rules to the point where you are learning a different game entirely. The tile values, scoring, and yaku lists in those apps do not match standard riichi rules. If you want to play competitively or even just understand the actual game, stick to platforms that implement full Japanese mahjong rulesets.

Common Beginner Mistakes

Beginners usually make three mistakes consistently. First, they declare riichi too early in the round because they feel pressured to act. Second, they ignore defense entirely until it is too late. Third, they count dora as a primary goal rather than a secondary bonus. Fixing these three issues alone will move most players from losing consistently to breaking even within about twenty hours of play. The fourth mistake is less obvious but more damaging. Beginners tend to build one hand per round and restart from scratch every time. In reality, the most efficient approach is to start with a flexible shape and refine it over multiple draws. Your first ten draws should focus on tile efficiency, not hand completion. This shifts your average hand completion time from roughly twelve draws to eight draws, which is the difference between winning and losing in most riichi matches.