Flush in crib hand

In cribbage, the probability and maximum and minimum score of each type of hand can be computed.

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Distinct hands[edit]

  • There are 12,994,800 possible hands in Cribbage: 52 choose 4 for the hand, and any one of the 48 left as the starter card.

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(524)×48=12,994,800{displaystyle {52 choose 4}times 48=12,994,800}

  • Another, and perhaps more intuitive way of looking at it, is to say that there are 52 choose 5 different 5-card hands, and any one of those 5 could be the turn-up, or starter card.
    Therefore, the calculation becomes:

(525)×5=12,994,800{displaystyle {52 choose 5}times 5=12,994,800}

  • 1,009,008 (approximately 7.8%) of these score zero points,[1] or 1,022,208 if the hand is the crib, as the starter must be the same suit as the crib's four cards for a flush.
  • Not accounting for suit, there are 14,715 unique hands.[2]

Maximum scores[edit]

  • The highest score for one hand is 29: 555J in hand with the starter 5 of the same suit as the Jack (8 points for four J-5 combinations, 8 points for four 5-5-5 combinations, 12 points for pairs of 5s and one for his nob).
  • The second highest score is 28 (hand and starter together comprise any ten-point card plus all four 5s, apart from the 29-point hand above).
  • The third highest score is 24 (A7777, 33339, 36666, 44447, 44556, 44566, 45566, 67788 or 77889).
  • The highest score as a dealer from the hand and crib is 53. The starter must be a 5, the hand must be J555, with the Jack suit matching the starter (score 29), and the crib must be 4466 (score 24), or vice versa.
  • The highest number of points possible (excluding pegging points) in one round is 77. The dealer must score 53, the opponent must then have the other 4466 making another 24 point hand for a total of 77.
  • The highest number of points from a hand that has a potential to be a '19 hand' is 15. It is a crib hand of one suit, 46J and another ten card, with a 5 of that suit cut up. The points are 15 for 6, a run for 9, nobs for 10, and a flush for 15. Any of the following cards in an unlike suit yields a '19 hand'; 2,3,7,8,and an unpaired ten card.
  • The most points that can be pegged by playing one card is 15, by completing a double pair royal on the last card and making the count 15: 12 for double pair royal, 2 for the 15, and 1 for the last card. This can happen in two ways in a two-player game. The non-dealer must have two ten-value cards and two 2s, and the dealer must have one ten-value card and 722, in which case the play must go: 10-10-10-go; 7-2-2-2-2. For example:
Alice
(dealer)
Bob
PlayerCardCumulativeScoreAnnounced
Bob10'ten'
Alice20'twenty'
Bob303 points (run)'thirty'
Alice1 point to Bob (30 for one)'go'
Alice7'seven'
Bob9'nine'
Alice112 points'eleven for two'
Bob136 points'thirteen for six'
Alice1515 points (double pair royal,
fifteen, last card)
'fifteen for fifteen'
  • Alternatively, the players can each have two deuces, with one also holding A-4 and the other two aces. Then play might go 4-A-A-A-2-2-2-2.
  • The maximum number of points that can be scored in a single deal by the dealer in a two player game is 78 (pegging + hand + crib):
    Non-dealer is dealt 3 3 4 4 5 J and Dealer is dealt 3 3 4 4 5 5. Non-dealer discards J 5 to the crib (as ill-advised as this may be). Dealer discards 5 5 to the crib. Note that the J is suited to the remaining 5. The remaining 5 is cut.
    Play is 3 3 3 3 4 4 4 4 go. The dealer scores 29 total peg points.
    The dealer's hand is 3 3 4 4 5 = 20
    The dealer's crib is J(nobs) 5 5 5 5 = 29
    The total score for the dealer is 29 + 20 + 29 = 78.
    Note that the correct play for both players is to keep 3 3 4 5 worth 10 points and discarding J 4 and 4 5 to the crib respectively, meaning in reality, this hand would never take place. A more realistic hand would be both players being dealt 3 3 4 4 J J with both discarding J J and a 5 cut. In this case, with pegging as described above, the total score would be 20 (hand) + 21 (crib) + 29 (pegging) = 70 points.
  • The maximum number of points that can be scored in a single deal by the non-dealer in a two player game is 48 (pegging + hand), with the following example :
    Non-dealer is dealt 5 5 4 4 crib crib and Dealer is dealt 4 4 5 9 crib crib. Cut card is a 6.
    Play is 5 5 5 4 4 4 4, with the Non-dealer pegging 24. The Non-dealer scores 24 in the hand for a total of 48 points.
  • The maximum number of points that can be scored with a four-card flush is 21, which is achieved with a hand of 5 5 10 J Q or 5 5 J Q K: a pair, six fifteens, a three-card sequence, and the flush. A five-card flush of 5 10 J Q K scores 18 if the Jack is not the starter.

Minimum scores[edit]

Can You Peg A Flush In Cribbage

  • The dealer in two-player, 6-card cribbage will always peg at least one point during the play (the pegging round), unless the opponent wins the game before the pegging is finished. If non-dealer is able to play at each turn then dealer must score at least one for 'last'; if not, then dealer scores at least one for 'go'.
  • While 19 is generally recognized as 'the impossible hand', meaning that there is no combination of 5 cards that will produce a score of 19 points, scores of 25, 26, 27, and greater than 29 are also impossible in-hand point totals.[1] Sometimes if a player scores 0 points in their hand they will claim they have a '19-point hand.'[3]

Minimum while holding a 5[edit]

If a player holds a 5 in their hand, that player is guaranteed at least two points, as shown below:

A 0-point hand must have five distinct cards without forming a run or a fifteen combination. If such a hand includes a 5, it cannot hold a 10 or a face card. It also cannot include both an A and a 9; both a 2 and an 8; both a 3 and a 7; or both a 4 and a 6. Since four more cards are needed, exactly one must be taken from each of those sets. Let us run through the possible choices:

  • If the hand includes a 9, it cannot hold a 6, so it must hold a 4. Having both a 4 and a 9, it cannot hold a 2, so it must hold an 8. Holding both a 4 and an 8, it cannot hold a 3, so it must hold a 7. But now the hand includes a 7-8 fifteen, which is a contradiction.
  • Therefore, the hand must include an A. If the hand includes a 7, it now cannot contain an 8, as that would form a 7-8 fifteen. However it cannot hold a 2, as that would form a 7-5-2-A fifteen. This is a contradiction.
  • Therefore, the hand must include a 3. Either a 2 or a 4 would complete a run, so the hand must therefore include a 6 and an 8. But this now forms an 8-6-A fifteen, which is a contradiction.

Therefore, every set of five cards including a 5 has a pair, a run, or a fifteen, and thus at least two points.

Interestingly, a hand with two 5s also can score only two points; an example is 2 5 5 7 9, which would be most likely a crib hand, and would not score a flush because of the pair, although said hand can be a non-crib four-card flush if either 5 is the starter. A hand with three 5s scores at least eight points; a hand with all four 5s scores 20 points and is improved only with a 10, J, Q, or K (scoring 28 except for the 29 hand previously described.)

It is also true that holding both a 2 and a 3, or an A and a 4 (pairs of cards adding up to five) also guarantees a non-zero score:

  • If a hand includes both a 2 and a 3 and is to score 0 points, it cannot have a face card, an A, a 4, or a 5. This requires three cards from the 6, 7, 8, and 9, and any such selection will include a fifteen.
  • If a hand includes both an A and a 4 and is to score 0 points, it cannot have a face card or a 5. It also cannot have both a 2 and a 3; both a 6 and a 9; or both a 7 and an 8. If the hand includes a 2, it cannot have a 9 (9-4-2 fifteen). Thus it must have a 6. It then cannot have an 8 (8-4-2-A fifteen) or a 7 (7-6-2 fifteen). If, however, the hand includes a 3, it cannot include an 8 (8-4-3 fifteen) or a 7 (7-4-3-A fifteen). These are all contradictions, so every hand containing both an A and a 4 scores at least two points.

Odds[edit]

  • The table below assumes the card(s) discarded to the crib are randomly chosen. Given this assumption, the odds of getting a 28 hand in a two-player game are about 1 in 170984, and a perfect 29 hand 1 in 3,248,700.[3]
  • However, if we assume that the player will always keep J555 if those cards are included in the hand, the odds of getting a perfect 29 hand starting with a six-card hand are 1 in 216,580, while the odds after discarding from a five-card hand are 1 in 649,740.[4]


Scoring Breakdown, assuming random discard(s) to the crib[1]

What
ScoreNumber of hands
(out of 12,994,800)
Percentage of handsPercentage of hands at least as high
01,009,0087.7647100
199,7920.767992.2353
22,813,79621.653291.4674
3505,0083.886269.8142
42,855,67621.975565.928
5697,5085.367643.9525
61,800,26813.853838.5849
7751,3245.781724.7311
81,137,2368.751518.9494
9361,2242.779810.1979
10388,7402.99157.4181
1151,6800.39774.4266
12317,3402.44214.0289
1319,6560.15131.5868
1490,1000.69341.4355
159,1680.07060.7421
1658,2480.44820.6715
1711,1960.08620.2233
182,7080.02080.1371
19000.1163
208,0680.06210.1163
212,4960.01920.0542
224440.00340.0350
233560.00270.0316
243,6800.02830.0289
25000.0006
26000.0006
27000.0006
28760.00060.0006
2940.000030.00003
  • Mean = 4.7692
  • Standard deviation = 3.1254
  • Skewness = 0.9039
  • Excess kurtosis = 1.4599

Note that these statistics do not reflect frequency of occurrence in 5 or 6-card play. For 6-card play the mean for non-dealer is 7.8580 with standard deviation 3.7996, and for dealer is 7.7981 and 3.9082 respectively. The means are higher because the player can choose those four cards that maximize their point holdings. For 5-card play the mean is about 5.4.

Slightly different scoring rules apply in the crib - only 5-point flushes are counted, in other words you need to flush all cards including the turn-up and not just the cards in the crib. Because of this, a slightly different distribution is observed:

Scoring Breakdown (crib/box hands only)

ScoreNumber of hands (+/- change from non-crib distribution)
(out of 12,994,800)
Percentage of handsPercentage of hands at least as high
01,022,208 (+13,200)7.8663100
199,792 (0)0.767992.1337
22,839,800 (+26,004)21.853491.3658
3508,908 (+3,900)3.916269.5124
42,868,960 (+13,284)22.077865.5962
5703,496 (+5,988)5.413743.5184
61,787,176 (-13,092)13.753038.1047
7755,320 (+3,996)5.812524.3517
81,118,336 (-18,900)8.606018.5393
9358,368 (-2,856)2.75789.9332
10378,240 (-10,500)2.91077.1755
1143,880 (-7,800)0.33774.2648
12310,956 (-6,384)2.39293.9271
1316,548 (-3,108)0.12731.5342
1488,132 (-1,968)0.67821.4068
159,072 (-96)0.06980.7286
1657,288 (-960)0.44090.6588
1711,196 (0)0.08620.2179
182,264 (-444)0.01740.1318
190 (0)00.1144
207,828 (-240)0.06020.1144
212,472 (-24)0.01900.0541
22444 (0)0.00340.0351
23356 (0)0.00270.0317
243,680 (0)0.02830.0289
250 (0)00.0006
260 (0)00.0006
270 (0)00.0006
2876 (0)0.00060.0006
294 (0)0.000030.00003
  • Mean = 4.7348

As above, these statistics do not reflect the true distributions in 5 or 6 card play, since both the dealer and non-dealer will discard tactically in order to maximise or minimise the possible score in the crib/box.

Card combinations[edit]

  • A hand of four aces (AAAA) is the only combination of cards wherein no flip card will add points to its score.
  • There are 71 distinct combinations of card values that add to 15:
Two
cards
Three
cards
Four cardsFive cards
X5
96
87
X4A
X32
95A
942
933
86A
852
843
77A
762
753
744
663
654
555
X3AA
X22A
94AA
932A
9222
85AA
842A
833A
8322
76AA
752A
743A
7422
7332
662A
653A
6522
644A
6432
6333
554A
5532
5442
5433
4443
X2AAA
93AAA
922AA
84AAA
832AA
8222A
75AAA
742AA
733AA
7322A
72222
66AAA
652AA
643AA
6422A
6332A
63222
553AA
5522A
544AA
5432A
54222
5333A
53322
4442A
4433A
44322
43332
Note: 'X' indicates a card scoring ten: 10, J, Q or K

Hand and Crib statistics[edit]

If both the hand and the crib are considered as a sum (and both are drawn at random, rather than formed with strategy as is realistic in an actual game setting) there are 2,317,817,502,000 (2.3 trillion) 9-card combinations.(524)×(484)×44=2,317,817,502,000{displaystyle {52 choose 4}times {48 choose 4}times 44=2,317,817,502,000}

  • As stated above, the highest score a dealer can get with both hand and crib considered is 53.
  • The only point total between 0 and 53 that is not possible is 51.

Scoring Breakdown

ScoreNumber of hand-crib pairs
(out of 2,317,817,502,000)
Percentage of hand-crib pairs to 6 decimal placesPercentage of hand-crib pairs at least as high
014,485,964,6520.624983100
13,051,673,9080.13166299.375017
280,817,415,6683.48678999.243356
323,841,719,6881.02862895.756566
4190,673,505,2528.22642494.727938
570,259,798,9523.03129186.501514
6272,593,879,18811.760883.470222
7121,216,281,6245.2297671.709422
8290,363,331,43212.52744666.479663
9151,373,250,7806.53085353.952217
10254,052,348,94810.96084347.421364
11141,184,445,9606.09126736.460521
12189,253,151,3248.16514530.369254
1398,997,926,3404.2711722.204109
14127,164,095,5645.48637217.932939
1559,538,803,5122.56874412.446567
1677,975,659,0563.3641859.877823
1732,518,272,3361.4029696.513638
1842,557,293,0001.8360935.110669
1917,654,681,8280.7616943.274576
2022,185,433,5400.9571692.512881
218,921,801,4840.3849231.555712
2210,221,882,8600.4410131.17079
234,016,457,9760.1732860.729776
245,274,255,1920.2275530.55649
251,810,154,6960.0780970.328938
262,305,738,1800.0994790.25084
27750,132,0240.0323640.151361
281,215,878,4080.0524580.118998
29401,018,2760.0173020.06654
30475,531,9400.0205160.049238
31184,802,7240.0079730.028722
32233,229,7840.0100620.020749
3382,033,0280.0035390.010686
3471,371,3520.0030790.007147
3519,022,5880.0008210.004068
3644,459,1200.0019180.003247
379,562,0400.0004130.001329
3810,129,2440.0004370.000916
391,633,6120.000070.000479
405,976,1640.0002580.000409
411,517,4280.0000650.000151
42600,9920.0000260.000085
43127,6160.0000060.00006
44832,7240.0000360.000054
45222,2200.000010.000018
4642,5600.0000020.000009
4724,3520.0000010.000007
48119,7040.0000050.000006
496,16800
5038400
51000
524,32000
5328800
  • Mean: 9.50397
  • Median: 9
  • Mode: 8

See also[edit]

References[edit]

What Is A Flush In Crib

  1. ^ abcSteven S. Lumetta (2007-05-15). 'Amusing Cribbage Facts'. Archived from the original on 2018-01-16. Retrieved 2008-03-03.
  2. ^Tim Wood (2008-08-05). 'All Possible Cribbage Hands'. Archived from the original on 2013-02-09. Retrieved 2008-08-05.
  3. ^ abWeisstein, Eric W. 'Cribbage'. MathWorld. Retrieved 2008-03-02. All scores from 0 to 29 are possible, with the exception of 19, 25, 26, and 27. For this reason, hand scoring zero points is sometimes humorously referred to as a '19-point' hand.
  4. ^Cribbage Corner (2008-05-05). 'Perfect cribbage hand odds'. Retrieved 2008-05-05.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Cribbage_statistics&oldid=995987590'

Traditional Cribbage is a card game that has been around since the 17th Century. It involves creating hands composed of pairs, runs, flushes, and sums to 15. Here at eCribbage.com, you can play 2 player, 3 player, and 4 player games. You can also play teams, muggins, and jokers.


What features make eCribbage.com the best?

How to play (2 player):

The players cut to see who gets the first 'crib'. Players are dealt 6 cards each, and both have to discard 2 cards into the crib. Then a community card is cut that will play for both hands in the show. If a jack is cut for the cut card, the player with the crib immediately gets 2 points. (This is called His Nobs). Now on to the play:

The play

Players take turns playing (pegging) their cards one at a time and announcing the total sum of the cards. Face cards count for 10. If the sum is equal to 15 or 31, that player gets 2 points. If the player forms a pair, they get 2 points. A triple pair is worth 6 points, and a quadruple pair is worth 12 points. If either player forms a run of 3 or more, they get to claim that many points as well. Runs do not necessarily have to be played in order. For example if 4,7,5,6 was played, whoever laid the 6 would get to claim a run for 4 points.

Flush In Crib Handle

You are not allowed to play a card to make a sum over 31, so if you play to 28 and your opponent only has cards of over 3, they will say GO and you will continue to play as many cards as you can up to 31. You also claim one point for playing the last card of every trick. Whoever played the last card in the trick, their opponent starts the next trick. When all cards have been played, you move on to the show.

The show

The show is where you count all the hands up. The player that does not have the crib counts first, then the player with the crib counts their hand, and then finally the crib is counted. Scores count for the following:

  • 2 points for every pair
  • 3 points for every run of 3.
  • 4 points for every run of 4.
  • 5 points for a run of 5.
  • 2 points for each sum to 15.
  • 4 points for a flush
  • 1 additional point for a 5 card flush.
  • 1 point for 'His Heels', if you have a jack and the suit matches the cut card.

  • How to play (3 player):

    3 player crib is very similar to 2 player crib except players are dealt 5 cards each instead of 6. They only throw one card each to the crib, and one card is taken off the top of the deck and placed in the crib.

    eCribbage.com also provides the variant where the dealer (the player with the crib) can deal themself 6 cards, and the rest of the players 5. The dealer throws 2 cards to their crib, and the rest of the players throw 1 card to the crib.

    Can You Get A Flush In Your Crib


    How to play (4 player):

    Flush In Crib Hand

    4 player crib is very similar to 2 player crib except players are dealt 5 cards each instead of 6. Every player throws one card to the crib. The play goes clockwise through all players. There is also a 2 vs 2, team cribbage game that is described on the team cribbage page.

    Does A Flush Count In Your Crib