Gamehelpeightyeight

Hachi-hachi rules

Basic Rules

   Hachi-hachi is a game of Hanafuda played in 6 or 12 rounds.

   A month (1 round) consists of a bidding phase, a play phase, and a scoring phase.

• One set of Hanafuda (12 suits, 4 cards each) is used.

• The units of scoring are kan and mon. 1 kan is equivalent to 12 mon. mon values are always written as a zero or a positive number.
  ~ For example, if you're forced to pay 5 mon, it will be displayed as -1 kan 7 mon.
  ~ Your score on BGA is your kan value. mon is used only to break ties in final scoring. All points (kan and mon) are paid from one player to another. There is no central bank, and any loss or gain of points will come from another player's stash.

• Hachi-hachi can be played with 3 to 6 players, but each play phase is limited to three players. In the bidding phase, players will determine whether they will join the play phase for that round.

• Special rule: All Willow (December) suit cards count as Chaff cards when determining hand yakus (Te-Yaku), card-set yakus (Deki-Yaku), and special-scoring yakus (Tokushu-Yaku).

  Initial Preparation

• Randomly determine the dealer (1st player) and seating order.
• Each player begins the game with -5 kan.

Play in a month (1 round)

• Before looking at their hand, the dealer may call "Mizuten". This commits them to "Join the Play" that round with limited information. If they do, they receive 1 kan from each other player.
• The dealer deals 7 cards to each player, then deals 6 cards to the table.

• Determine the scoring multiplier for the round (small deal = 1x, big deal = 2x, great deal = 4x).
  ~ If no Bright cards appear on the table, the deal is a "small deal" and no multiplier is applied. (1x)
  ~ If a Bright card of Pine, Cherry-Blossom or Eulalia appears on the table, the deal is a "big deal", and all subsequent gains and losses are doubled. (2x)
  ~ If a Bright card of Willow or Paulownia appears on the table, the deal is a "great deal", and all subsequent gains and losses are quadrupled. (4x)
  ~ If more than one Bright card appears in the table, apply the higher multiplier to this round, and carry the lower multiplier over to the next round.

  Bidding phase

• Starting with the dealer, each player looks at their hand and declares whether they want to "Join the Play" or "Get Out of Play".
  ~ If the dealer called "Mizuten" before looking at their hand, they must "Join the Play". ~ If the player chooses "Join the Play", they commit to playing their hand for that round.
  ~ If the player chooses "Get Out of Play", they sit out this round. The first player to call "Get Out of Play" pays 1 kan, the second player pays 1.5 kan, and the third player pays 2 kan.
• If three players call "Join The Play", all remaining players must call "Get Out of Play"
  ~ Players who called "Get Out of Play" will receive points from the players who called "Join The Play", according to their hand yakus (Te-Yaku).
• If three players call "Get Out of Play", all remaining players must call "Join The Play".
• Players who call "Join the Play" and have any hand yakus (Te-Yaku) receive points from each other player who called "Join the Play".
• Players who call "Get Out of Play" and have any hand yakus (Te-Yaku) receive points from each player who called "Join the Play".
• Once hand yakus have been scored, all hands from players who called "Get Out of Play" are shuffled together to form the central deck.

Scoring for players who call "Get Out of Play"

Players who call "Get Out of Play" receive the following points from the players who called "Join the Play", depending on the yakus present in their starting hand.

• If the player has any hand yakus (Te-Yaku), the player receive half the points of the hand yaku points from each player who called "Join the Play".
• If the player has all cards of a card-set yaku (Deki-Yaku) in their hand, they receive half of the points of the card-set yaku (Deki-Yaku) from each player who called "Join the Play".
• If the player has a special-scoring yaku (Tokushu-Yaku) (six non-Willow Ribbons, or five Brights) they receive 3 mon from each player who called "Join the Play".

Playing phase

• Players play in the order in which they called "Join The Play".

• Three players take turns to play and collect cards.
  ~ The active player plays a card from their hand. If a card of the same suit is on the table, the player collects both cards.
  ~ Next, the active player flips over the top card of the central deck. If a card of the same suit is on the table, the player collects both cards.
  ~ If there are two cards of a matching suit on the table, the player chooses one to collect and the other card remains on the table.
  ~ If there are three cards of a matching suit on the table, the player collect all four cards.
  ~ If there are no cards of that suit on the table, the player collects nothing and the card remains on the table.
  
• When a player completes a card-set yaku (Deki-Yaku) with the cards they have collected, the playing phase ends immediately and the scoring phase begins.
  
• When a player has one more card to complete a card-set yaku (Deki-Yaku) (three red poetry Ribbons, three blue Ribbons, four Brights, or five Brights),
  ~ With Hatto rule, the player who plays the last card or the card corresponding to the last card of the hand pays for the two players alone when the player completes a card-set yaku (Deki-Yaku).
  ~ Note that if there is only one card remaining in the hand, it does not fall under Hatto.
  ~ When a player could have stopped his or her opponent from making a card-set yaku (Deki-Yaku) with his or her dealt cards, but did not, and the opponent ended up making the card set yaku (Deki-Yaku), The Hatto rule applies in this case.
• If there is an additional 1 kan associated with the hand yakus (Te-Yaku) or Mizuten, it will be paid.

Rule of "Continue playing"

     When a player make a card set yaku (Deki-Yaku) and is likely to make another card set yaku (Deki-Yaku), he or she may continue to play.

     In the BGA, if there is no possibility that another possible card set yaku (Deki-Yaku) can be made, the game will be moved to the scoring calculation without confirming whether or not to continue play.

     

After play continues

• When the player who continue playing completes another card set yaku (Deki-Yaku)
  ~ The player receive both card set yaku (Deki-Yaku) points.
• When another player completes a card set yaku (Deki-Yaku)
  ~ card set yaku (Deki-Yaku) of the player who continue playing is nullified.
  ~ The player who continue playing pays two players' points alone.
• when no player completes card set yaku (Deki-Yaku)
  ~ If play continues and the deal ends without any player having made a card set yaku (Deki-Yaku), the player who continued to play receives half of the point of the card set yaku (Deki-Yaku).
  

Scoring phase

• When the playing phase ends without any player completing a card-set yaku (Deki-Yaku), check if any player completed a special-scoring yaku (Tokushu-Yaku).
  ~ If a special-scoring yaku (Tokushu-Yaku) is made, the hand yakus (Te-Yaku) paid at the beginning of the round will be refunded.
• If there is neither card-set yaku (Deki-Yaku) nor special-scoring yaku (Tokushu-Yaku), the score is calculated.
  ~ Each player calculate sum of the scores of the cards he or she acquired, he or she receive (sum points minus 88)/12 kans. (If the score is negative, it is paid.)
• The player with the highest score receives the payment of the player declares "Get Out of Play".
  ~ If there are two players with the highest score, the player with the first place in the order of play receives the payment of the player declares "Get Out of Play".
• The player with the highest number of points will be the dealer for the following month.

Final Settlement

   At the end of 12 rounds, the player with the highest score receives a score of (# of players * 5) kan for the top prize. (These points were taken at the beginning of the game). If there is a tie, the winners split the jackpot equally.

Variant Rules

Game length

Half Year: Play 6 rounds (months). Each player starts the game with -3 kan.
Full Year: Play 12 rounds (months). Each player starts the game with -5 kan.

3-player game

When there are three players, the bidding phase is omitted and only the play phase is conducted.
~ Hand yaku, card-set yaku and special scoring yaku are handled as usual.

Details of yakus

List of Hand yakus (Te-Yaku)

   There are two types of hand yakus: by Chaff cards and by distribution of suits.

   If there are both by Chaff cards and by distribution of suits, the player will get points for both.

Hand yakus by Chaff cards

• All Chaff (4 kan)
  ~ If a player has 7 Chaff cards (including the willow suit) in his/her hand the player receive 4 kan from each opponent.
  ~ The player opens all cards in his/her hand.
  ~ If a player scores 89 points or more, he or she will receive one additional kan.
• Single Bright (4 kan)
  ~ If a player has 6 Chaff cards (including the willow suit) and a Bright card in his/her hand the player receive 4 kan from each opponent.
  ~ The player opens 6 Chaff cards (including the willow suit) in his/her hand.
• Single Animal (3 kan)
  ~ If a player has 6 Chaff cards (including the willow suit) and a Animal card in his/her hand the player receive 3 kan from each opponent.
  ~ The player opens 6 Chaff cards (including the willow suit) in his/her hand.
  ~ If a player scores 89 points or more, he or she will receive one additional kan.
• Single Ribbon (3 kan)
  ~ If a player has 6 Chaff cards (including the willow suit) and a Ribbon card in his/her hand the player receive 3 kan from each opponent.
  ~ The player opens 6 Chaff cards (including the willow suit) in his/her hand.
  ~ If a player scores 89 points or more, he or she will receive one additional kan.
• Red (2 kan)
  ~ If a player has only Chaff cards (including the willow suit) and Ribbon cards in his/her hand the player receive 2 kan from each opponent.
  ~ The player opens Chaff cards (including the willow suit) in his/her hand.
  ~ If a player scores 89 points or more, he or she will receive one additional kan.
  ~ If all seven cards in the hand are Ribbon cards, the hand yaku is also Aka, but in this case the cards in the hand are not open.

  Hand yakus by suit distribution

• Three (2 kan)
  ~ If the player's suit distribution in hand is 3+1+1+1+1 or 3+2+1+1, the player receives 2 kan from each opponent.
  ~ The player reveals the 3-card set in their hand.
  ~ If that player collects all four cards of that suit, they get one additional kan.
• Weak Three (3 kan)
  ~ If the player's suit distribution in hand is 3+1+1+1+1 or 3+2+1+1 and the three cards suit is wisteria, iris, bush clover, or three Chaff cards of paulownia the player receive 3 kans from each of the opponent players.
  ~ The player reveals the 3-card set in their hand.
  ~ If that player collects all four cards of that suit, they get one additional kan.
• Three Pairs (4 kan)
  ~ If the player's suit distribution in hand is 2+2+2+1 the player receives 4 kan from each opponent.
  ~ The player reveals the three pairs in their hand.
• Four (6 kan)
  ~ If the player's suit distribution in hand is 4+1+1+1 the player receives 6 kan from each opponent.
  ~ The player reveals the 4-card set in their hand.
• Full House (7 kan)
  ~ If the player's suit distribution in hand is 3+2+2 the player receives 7 kan from each opponent.
  ~ The player reveals all cards in their hand.
• One Two Four (8 kan)
  ~ If the player's suit distribution in hand is 4+2+1, the player receives 8 kan from each opponent.
  ~ The player reveals all cards in their hand.
• Double Threes (6 kan)
  ~ If the player's suit distribution in hand is 3+3+1, the player receives 6 kan from each opponent.
  ~ The player reveals both 3-card sets in their hand.
  ~ If the player collects all four cards of both of those suits, they get one additional kan.
• Three Weak Three (7 kan)
  ~ If the player's suit distribution in hand is 3+3+1, and one of the 3-card suits is wisteria, iris, bush clover, or three paulownia Chaff cards, the player receives 7 kan from each opponent.
  ~ The player reveals both 3-card sets in their hand.
  ~ If the player collects all four cards of both of those suits, they get one additional kan.
• Double Weak Threes (8 kan)
  ~ If the player's suit distribution in hand is 3+3+1, and both of the 3-card suits are wisteria, iris, bush clover, or three paulownia Chaff cards, the player receives 8 kan from each opponent.
  ~ The player reveals both 3-card sets in their hand.
  ~ If the player collects all four cards of both of those suits, they get one additional kan.
• Four Three (20 kan)
  ~ If the player's suit distribution in hand is 4+3, the player receives 20 kan from each opponent.
  ~ The player reveals all cards in their hand.

  Other

• Mizuten
  ~ When the dealer calls "Mizuten", they receive 1 kan from each player who called "Get Out of Play" this round. ~ At the end of the round, if the player who called "Mizuten" scores 89 points or more, they receive 1 kan from each opponent.
  
  

List of Card set yaku (Deki-Yaku)

   When a player acquires the card set yaku (Deki-Yaku) during play, the play phase ends immediately and the score is calculated.

   When a player make a card set yaku (Deki-Yaku) and is likely to make another card set yaku (Deki-Yaku), he or she may continue to play.

• Three Poetry Red Ribbons (7 kan)
  ~ When a player collects 3 Ribbon cards of pine, plum blossoms, and cherry blossoms, the player receives 7 kan from each opponent.
• Three Blue Ribbons (7 kan)
  ~ When a player collects 3 Ribbon cards of peony, chrysanthemum, and maple, the player receives 7 kan from each opponent.
• Seven Ribbons (10 kan)
  ~ When a player collects 7 of the 9 Ribbon cards (excluding the willow Ribbon card, which counts as a Chaff) the player receives 10 kan from each opponent.
• Four Brights (10 kan)
  ~ When a player collects 4 Bright cards of pine, cherry blossoms, eulalia, and paulownia, the player receives 10 kan from each opponent.
• Five Brights (12 kan)
  ~ When a player collects 5 Bright cards of pine, cherry blossoms, eulalia, paulownia, and willow, they receives 12 kan from each opponent.

List of special scoring yaku (Tokushu-Yaku)

   The special scoring yaku will be confirmed at the end of the play phase.

   The hand yakus (Te-Yaku) paid at the beginning of this deal and the payment associated with the hand yakus (Te-Yaku) will be refunded.

• 16 Chaff cards (12 kan)
  ~ If a player collects 16 or more Chaff cards (including the willow suit) at the end of play the player receive 12 kans from each of the opponent players.
  ~ For each additional Chaff card (including the willow suit), the score is increased by 2 kan.
• double score (10 kan)
  ~ If a player collects 168 score points or more at the end of play the player receive 10 kans from each of the opponent players.
  ~ For each additional point scored the score is increased by 1 kan.
• all 88 (10 kan)
  ~ If all three players have a score of 88 at the end of play the first player in the order of play wins.
  ~ The first player in the order of play receives 10 kan from each of the opponent players.

Hanafuda cards

   Hanafuda cards consist of 12 suits, 4 cards in each, as follows.

   For details, refer to the https://en.wikipedia.org/wiki/Hanafuda .

   

Suit (Flower)	Card composition
Pine	Bright card, Ribbon card, Chaff card, Chaff card
Plum blossom	Animal card, Ribbon card, Chaff card, Chaff card
Cherry blossom	Bright card, Ribbon card, Chaff card, Chaff card
Wisteria	Animal card, Ribbon card, Chaff card, Chaff card
Iris	Animal card, Ribbon card, Chaff card, Chaff card
Peony	Animal card, Ribbon card, Chaff card, Chaff card
Bush clover	Animal card, Ribbon card, Chaff card, Chaff card
Eulalia (Susuki grass)	Bright card, Animal card, Chaff card, Chaff card
Chrysanthemum	Animal card, Ribbon card, Chaff card, Chaff card
Maple	Animal card, Ribbon card, Chaff card, Chaff card
Willow*	Bright card, Animal card, Ribbon card, Chaff card
Paulownia	Bright card, Chaff card, Chaff card, Chaff card

   *: All willow suit cards count as Chaff cards in the hand yakus (Te-Yaku), card set yaku (Deki-Yaku), and special scoring yaku (Tokushu-Yaku).

Card scoring point

The scoring points of the cards are as follows.

Card type	Value
Bright (Hikari) card	20 mon
Animal (Tane) card	10 mon
Ribbon (Tanzaku) card	5 mon
Chaff (Kasu) card	1 mon