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'''Minefield mahjong''' is a specialized [[Japanese mahjong|mahjong]] variant found in the anime and manga series, [[wikipedia:Kaiji_(manga)|Kaiji]]. This variant features two players, who take 34 tiles and arrange 13 of them into a [[tenpai]] hand. Any remaining tiles are used as player discards, where the players take turns making their discards.  In a sense, this can be interpreted as a tile discard reading drill for [[defense]] practice.
'''Minefield mahjong''' is a specialized [[Japanese mahjong|mahjong]] variant found in the anime and manga series, [[wikipedia:Kaiji_(manga)|Kaiji]]. This variant features two players, who take 34 tiles and arrange 13 of them into a [[tenpai]] hand. Any remaining tiles are used as player discards, where the players take turns making their discards.  In a sense, this can be interpreted as a tile discard reading drill for [[defense]] practice.


==Rules==
==Rules==
* Players gather 34 tiles.
* Players gather 34 tiles.
* Of the 34, 13 tiles are used to form a tenpai hand.
* Use 13 tiles to form a tenpai hand. The remaining tiles are to be used for discards.  
* Remaining tiles are to be used for discards.
** In the original work, hands must be [[mangan]] or higher. If the hand is lower, it cannot win.
* Players take turns making those discards.
* Determine player order by any method (e.g. dice roll or coin flip). Then, take turns making discards.
* Order of which player makes the first discard may be determined using various methods, such as the dice roll or a coin flip.
* If a discarded tile is the other player's winning tile, then [[ron]] may be called. (Players cannot win by [[tsumo]].)
* Naturally, if a discarded tile is a winning tile, then [[ron]] may be called.
* If a player discards their own winning tile, they become [[furiten]] as usual, and can no longer win.
* A player may not win with one's own discard; or a player cannot call [[tsumo]].
* After 17 discards by both players, the game ends in a draw.
* If a winning tile is discarded, then [[furiten]] is invoked.
* An additional rule to the hand formation may require players to produce a [[mangan]] or better hand.


===Variation===
The mangan rule may be turned off for greater hand variation, or to make the game easier for new players.  
If desired, players can default the setting for automatic [[riichi]] upon the first discard.  In effect, that's a [[double riichi]].  This is for the purpose of just adding value.


The mangan rule may be turned off for greater hand variation. For a challenge, players can add the dice roll to determine the hand's minimum han value.
===Scoring===
If using the mangan rule, these are the specific rules regarding scoring:
* [[Kiriage mangan]] is enabled, so 4 han 30 fu hands count as mangan.
* Players start the game in [[riichi]] (but not [[double riichi]]), so all hands have the riichi yaku.
* [[Ippatsu]] is scored on the opponent's first discard; there is no [[renhou]].
* [[Atozuke]] is allowed. If the opponent deals a winning tile that wouldn't score mangan, the other player in furiten.
* There is no [[round wind]]. The first player's [[seat wind]] is East and the second player is West.
* [[Kan]] is not allowed.
* If you cannot or do not wish to make a mangan hand, your hand can be in noten with no [[chombo]] penalty.


==External links==
==External links==
* [http://pwmarcz.pl/minefield/ Minefield mahjong]
* [http://pwmarcz.pl/minefield/ Minefield mahjong]
: Flash version of the game
: Online version of the game


[[Category:Variants]]
[[Category:Variants]]
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