| Designed by | Maginobi |
| Players | 1 |
| Length | 20 minutes |
| Extra Material | None |
A variant of ivory-tower (with many changes) similar to standard solitaire or Towers of Hanoi.
Setup
Remove the Aces, Crowns, Pawns, and Courts from the deck and shuffle.
Game play
The goal of this game is to arrange the deck into three towers of descending rank where each card shares at least one suit with the card below it by making moves that keep the same rules.
There are 5 empty tower spaces in front of you where you can build your towers. To start the game, flip over the top card of the deck and place it into one of the 5 tower spaces, then flip over a new card and leave it on top of the deck.
Each turn, you may either move the top card from one tower space to another tower space or move the card on top of the deck to a tower space and flip over the new top card of the deck. Always follow these placement rules:
- A card must share at least one suit with the card it is placed on top of. (Empty spaces accept cards of any suit)
- A card must have lower value than the card it is placed on top of.
You win when the deck is empty and there are three towers each with all ranks 2-9 in descending order with each card sharing a suit with its neighbors.
The extended deck
Pawns and courts are not used in this game.
Variants
Adjusting Difficulty: I believe it is possible to win this game regardless of how the deck is shuffled given enough time, but it can be very difficult. For an easier game, remove high-ranked cards from the deck to select your difficulty level. At level 6 (only cards going up to rank 6 included) the game is easy to win every time; at level 9 (all cards included) I find I win about 1 in 3 games.
Ivory Three Towers: For an additional challenge, select a suit at the start of the game that one of your towers will exclusively contain. You win only when you have three towers and one of them has every card it contains matching the suit you selected. While this technically makes the game harder, it also provides direction and is how I usually play. It is not possible to have more than one tower at end of game that is Ivory in different suits.
Quota: This game was originally intended as a mini game in an rpg for an extended skill check with a partial Decktet with the number of cards of a given suit fixed to the character's skill. Then, the player wins when they have extracted a specific number of cards of the given suit set as the difficulty of the check. Play as with Ivory Three Towers above, but you win when your ivory tower has at least as many cards as a preset quota. (3 = very easy, 5 or 6 = medium, 8 = very hard)