I'm trying to figure out my own variant of Poker using a Tarot Deck. I want to have 5 and 7 card versions. I figure the most practical way to use the Major Arcana is to have consecutive Majors function as higher Pairs, 3 of a Kind, 4 of a Kind, etc. I think I want to have the Jokers either play below Jacks and above 10's or as Suited Wild Cards (I think the first option might be better). I think the Majors should plays as their own Suit with all ranks higher than Aces, so they don't contribute to any sets, straights, or flushes with Minors (the regular playing cards). The Fool (0) is the Majors' Ace, so it plays below The Magician (I) and above The World (XXI). Anyone have any suggestions? Aside from the obvious: just play regular Poker.
Ok, so I have an update, I've done some number crunching and have the probabilities for each 5 card hand. I haven't done any such work for higher order hands but might later (and might even try an 8 card variant, like in the book Last Call by Tim Powers).
For the following table, the Major Arcana are called Trumps, and a hand might be 5T for 5 Trumps (this is the Trump Flush) to NT (no Trumps)
Anyhow, the probabilities are as follows:
5T Straight Flush - 19
NT Straight Flush - 44
Total Straight Flushes 63
1T 4 of a Kind - 308
NT 4 of a Kind - 728
Total 4 of a Kind 1,036
Full House - 4,368
5T Flush - 26,315
NT Flush - 7,964
Total Flushes 34,279
NT Straight - 11,220
2T 3 of a Kind - 12,936
1T 3 of a Kind - 64,064
NT 3 of a Kind - 69,888
Total 3 of a Kind 146,888
1T 2 Pair - 72,027
NT 2 Pair - 157,248
Total 2 Pair 229,320
3T 1 Pair - 129,360
2T 1 Pair - 1,009,008
1T 1 Pair - 2,306,304
NT 1 Pair - 1,537,536
Total 1 Pair 4,982,208
4T No Pair - 409,640
3T No Pair - 2,242,240
2T No Pair - 5,381,376
1T No Pair - 5,637,632
NT No Pair - 2,030,820
Total No Pair 15,701,708
Total 5 Card Hands 21,111,090
There are a few circumstances that contradict Standard Poker odds, mainly that Flushes outnumber Straights. This is due to the additional suit of Trumps, 22 of them.
Another complication is that for 1 Pair and No Pair hands, 1 Trump is more common than No Trump.
The issue of Flushes outnumbering Straights could be resolved by only counting Straight Flushes in the Trumps Suit, with the 5 Trumps Flush instead becoming a 5 Trumps No Pair or High Card.
These new probabilities are as follows:
5T Straight Flush - 19
NT Straight Flush - 44
Total Straight Flushes 63
1T 4 of a Kind - 308
NT 4 of a Kind - 728
Total 4 of a Kind 1,036
Full House - 4,368
NT Flush - 7,964
NT Straight - 11,220
2T 3 of a Kind - 12,936
1T 3 of a Kind - 64,064
NT 3 of a Kind - 69,888
Total 3 of a Kind 146,888
1T 2 Pair - 72,027
NT 2 Pair - 157,248
Total 2 Pair 229,320
3T 1 Pair - 129,360
2T 1 Pair - 1,009,008
1T 1 Pair - 2,306,304
NT 1 Pair - 1,537,536
Total 1 Pair 4,982,208
5T No Pair - 26,315
4T No Pair - 409,640
3T No Pair - 2,242,240
2T No Pair - 5,381,376
1T No Pair - 5,637,632
NT No Pair - 2,030,820
Total No Pair 15,728,023
Total 5 Card Hands 21,111,090
Then the original hand ranking order is maintained, and the Trumps become additionally disadvantageous to have in your hand unless you have a Trumps Straight Flush which is still the highest hand in the game. The principal advantage to having the Trumps as higher cards is that they do not tie with each other, they are all different ranks and are all ranked above Aces, but cannot form Straights with Aces. So they can be very high cards but easily be beaten by pairs or other standard hands.
So, now my real question is:
Do I keep the Trumps Flush or making it a Trumps high card?
If I keep the Trumps Flush, do I demote the Flush under the Straight, or do I simply accept the mathematical issue of a higher ranked hand being more common than its lower neighbor?
Trumps High Card and Demoted Flushes both maintain mathematical regularity, while Trumps Flushes in regular position is more intuitive to regular Poker ranking. We can call Trumps Flushes Option 1.
Trumps High Card is mathematically regular, keeps ranks in order, but makes Trumps really counterintuitive because a Trumps Flush, arguably the highest non-Straight Flush, is below a Pair. We can call Trumps High Card Option 2.
Demoted Flushes is also mathematically regular, and relatively easy to learn, but still contradicts regular Poker ranking by swapping two ranks around. We can call Demoted Flushes Option 3.
So, anyone interested in adding in here, which option sounds best?