Odd and Even is decided by rank parity, not by clever play.
Every foundation in Odd and Even accepts exactly one rank at any given moment, so there is rarely a real choice about wherea playable card should go. The skill in this game is entirely in reading the board correctly — knowing which of a suit's two foundations is waiting for which rank, prioritizing the reserve over the waste, and managing the single redeal you are given. This guide walks through each of those mechanics using the exact rank sequences the game enforces.
Last updated: August 2026
Two rank sequences, and why they never collide
Odd and Even deals out eight foundations from two shuffled 52-card decks — one Ace foundation and one Deuce foundation per suit. The two foundations that share a suit follow different rank sequences:
- Ace foundation — A → 3 → 5 → 7 → 9 → J → K → 2 → 4 → 6 → 8 → 10 → Q. It runs every odd rank in order, then wraps into the even ranks.
- Deuce foundation — 2 → 4 → 6 → 8 → 10 → Q → A → 3 → 5 → 7 → 9 → J → K. It runs every even rank in order, then wraps into the odd ranks.
Because those two sequences are offset from each other, a given suit's Ace foundation and Deuce foundation are never both waiting on the same rank at the same time. For example, once the Ace foundation has placed its A and needs a 3, the Deuce foundation (which is somewhere in 2 → 4 → 6 → 8 → 10 → Q) cannot also need a 3 — a 3 only ever completes one of the two foundations at once. This means that whenever a playable card appears, there is only one legal foundation for it. The apparent complexity of "two foundations per suit" never produces a real decision about destination — it only produces bookkeeping about which foundation is close to needing which card next.
Because each foundation needs exactly 12 more cards after its base card, you can measure how far behind a foundation is by counting how many ranks remain in its sequence from its current top card to Q (Ace foundations) or K (Deuce foundations). A foundation stuck at its 4th card with 8 ranks still to go is a foundation worth watching closely as the stock runs down.
Reserve before waste: the refill priority that matters
The reserve is a fixed 3×3 grid of 9 cells. All nine are visible and playable at all times — there is no stacking or building inside the reserve, only reserve cell → foundation moves. When a reserve cell is emptied, the game refills it immediately using a strict priority: the top card of the waste pile first, and only if the waste is empty does a fresh card come from the stock.
This refill rule creates a genuine tempo choice whenever a foundation move is legal from both a reserve cell and the waste top at the same moment. Playing the reserve card accomplishes two things: it advances a foundation, and it immediately pulls the current waste-top card into the newly empty reserve cell — where it becomes visible and directly playable again, rather than sitting under whatever you draw next. Playing the waste card instead only accomplishes the foundation move; the reserve cell that could have absorbed it stays as it was.
The clubs Deuce foundation currently shows an 8♣ on top and needs a 10♣ next. Reserve cell 4 holds a 10♣, and the waste pile also happens to have a 10♣ on top (the other deck's copy). Play the reserve card: the foundation advances to 10♣, and reserve cell 4 immediately takes whatever is on top of the waste pile, keeping that card in play. If you play the waste 10♣ instead, the foundation still advances, but reserve cell 4 stays occupied by its original (now-useless) 10♣ until some other move happens to empty a different cell — the waste top from that turn is never captured into the reserve at all.
Managing the single redeal
Odd and Even allows exactly one redeal — half of what Sultan grants and far fewer than most fan-based patience games. After the 8 base cards and 9 reserve cards are dealt, the stock holds 87 cards. Draw them one at a time to the waste; once the stock is empty, you may turn the waste face-down (without shuffling) and use it as a new stock exactly once. After that second pass is exhausted, any card still stuck in the waste or stock is stuck for good.
With only two total passes through the deck, the practical rule is: never draw past a waste-top card that is currently playable. Every draw buries the current waste top one card deeper, and with only one redeal, cards buried near the bottom of a large waste pile may not resurface in time. Clear every available reserve and waste move before drawing again.
Because the reserve grid is small (9 cells) relative to the 87-card stock, most of the game's content passes through the waste pile rather than the reserve. Pay close attention during the first pass: by the time the stock runs out, you should know exactly which foundations are lagging and roughly where in the recycled waste their needed ranks will reappear.
Reading a stalled foundation
A foundation stalls when both copies of the rank it currently needs are unavailable — either already buried in the waste pile below the current draw point, or sitting in a reserve cell that has no reason to be played yet. Because Ace and Deuce foundations for the same suit never compete for the same rank, a stalled foundation is never "fixed" by a decision elsewhere on the board; it can only be fixed by that specific rank surfacing.
The practical takeaway is to track, suit by suit, which of the two foundations is further from completion, and specifically watch the waste pile for that foundation's next needed rank. Since both copies of every rank exist somewhere in the 96 cards outside the eight foundation bases, a stalled foundation is recoverable as long as at least one copy of its needed rank has not yet passed through an exhausted stock/waste cycle.
Every foundation's last required card is the one that completes the wraparound half of its sequence (Q for Ace foundations, K for Deuce foundations). Those cards are exactly as available as any other rank — no special handling applies — but because they arrive last in the sequence, they are the rank you are statistically least likely to have already seen twice by the time you need them. Note their position in the waste order as you go rather than assuming they will simply turn up on the second pass.
Where Odd and Even games are lost
- Drawing past a legal move. Any turn where a reserve or waste card could go to a foundation but you draw instead pushes that card one layer deeper into the waste, with only one redeal to recover it.
- Ignoring the reserve-over-waste priority. When the same rank is legally playable from both the reserve and the waste, playing the waste copy wastes the chance to pull the current waste top into an open reserve cell.
- Losing track of which foundation owns which rank.Because the Ace and Deuce foundations for a suit are always at different points in their sequences, mentally merging them into "the clubs foundations" instead of tracking each one's specific next-needed rank makes it easy to overlook a playable card sitting in the reserve.
- Treating the redeal as a safety net. With only one redeal available, a deal where several foundations are each missing a rank that landed early in the same waste pass is often unrecoverable — recognize this by the end of the first pass rather than hoping the second pass resolves it.