Multipliers & Awards

When a round ends with a winner, the award is the base points multiplied by up to three separate multipliers. The formula is the same in every rule set.

The formula

award = base × seven_multiplier × opponent_koi_multiplier × caller_multiplier

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Multiplier	When it applies	Value
7+ points	The base is 7 or more.	×2
Opponent called Koi-Koi	The player who lost the round called Koi-Koi at least once.	×2
Your own Koi-Koi streak	Each Koi-Koi call you make in the round.	×(1 + calls), capped at ×6

The multipliers stack by multiplying together. The 7+ and opponent multipliers are each a fixed ×2. Only your own streak has a cap: it stops at ×6, which you reach after five calls.

Your own Koi-Koi streak

Each time you call Koi-Koi, your own multiplier goes up by one step:

Your Koi-Koi calls this round	Caller multiplier
0	×1
1	×2
2	×3
3	×4
4	×5
5 or more	×6 (cap)

Your own calls never double your opponent's score. They only raise your own award.

Award tables

Each table shows the award for a given base, with and without the opponent's Koi-Koi.

Opponent Koi-Koi calls: none (x1)

Base points	no self Koi (x1)	1 call (x2)	2 calls (x3)	3 calls (x4)	4 calls (x5)	5+ calls (x6)
1	1	2	3	4	5	6
2	2	4	6	8	10	12
3	3	6	9	12	15	18
4	4	8	12	16	20	24
5	5	10	15	20	25	30
6	6	12	18	24	30	36
7	14	28	42	56	70	84
8	16	32	48	64	80	96
9	18	36	54	72	90	108
10	20	40	60	80	100	120
12	24	48	72	96	120	144
15	30	60	90	120	150	180
20	40	80	120	160	200	240

Opponent Koi-Koi calls: 1 or more (x2)

Base points	no self Koi (x1)	1 call (x2)	2 calls (x3)	3 calls (x4)	4 calls (x5)	5+ calls (x6)
1	2	4	6	8	10	12
2	4	8	12	16	20	24
3	6	12	18	24	30	36
4	8	16	24	32	40	48
5	10	20	30	40	50	60
6	12	24	36	48	60	72
7	28	56	84	112	140	168
8	32	64	96	128	160	192
9	36	72	108	144	180	216
10	40	80	120	160	200	240
12	48	96	144	192	240	288
15	60	120	180	240	300	360
20	80	160	240	320	400	480

(computed by calculate_award() in src/rules.c; base <= 0 always awards 0)

Worked examples

Example 1: a bank with a streak. You call Koi-Koi three times, then bank a round worth 6 base points. The opponent never called. Caller multiplier is ×4, and the base is under 7, so there is no 7+ bonus.

6 × 4 = 24

Example 2: the 7+ bonus plus the opponent's call. You bank with 8 base points, and the opponent called Koi-Koi once. You made no calls.

8 × 2 (7+) × 2 (opponent Koi-Koi) × 1 = 32

Example 3: a big streak. You bank with 12 base points after one Koi-Koi call. The opponent never called.

12 × 2 (7+) × 2 (your streak) = 48

Check examples 1 and 3 against the tables above: 6 with a ×4 caller multiplier is 24, and 12 with one call is 48.

Non-scoring awards

Some awards are fixed and skip the formula:

• Lucky hand (Teshi or Kuttsuki): 6 points, no multipliers.
• Yakuza Dealer's Privilege: 6 points, no multipliers. See Yakuza.
• Round with a base of 0: no award. A round can only end as a Shobu after the base has gone up, so a Shobu always has a base of at least 1.

KK-ADD-10 match-end minipoints

The KK-ADD-10 speed minigame is separate from this round-award formula. Its minipoints do not multiply a yaku award and are not added after each round. Once the final round is over, every full 10 minipoints adds 1 point to your match total before the winner and result screen are decided; any remainder is discarded.

Koi-Koi decisions

The game only offers Koi-Koi or Shobu when your score has gone up since your last call this round. The question is always "stop and bank this, or risk it for more?" The award line on the decision screen shows the exact multiplied value you would get if you stopped now.

On Nintendo, Tournament, and Yakuza, you can only call Koi-Koi once per round. After that, the next score increase is an automatic Shobu. On FudaWiki and KK-ADD-10 you can keep calling. See the rule set pages.