Play Odd and Even Solitaire Online - The Numerical Sequencing Challenge

Odd and Even Solitaire is a classic two-deck patience with a unique numerical twist: instead of building foundations one rank at a time, every foundation climbs in steps of two. Four foundations start with an Ace and run through the odd ranks first; four start with a Two and run through the even ranks first. The sequences wrap around the top of the deck, so every foundation eventually collects all thirteen ranks of its suit!

How to Play Odd and Even Solitaire

Objective: Move all 104 cards (two full decks) onto the eight foundations, building each one up by twos until it holds 13 cards.

Game Setup

• Decks: Two standard 52-card decks shuffled together (104 cards)
• Reserve: 9 cards dealt face-up in a row of single-card spaces
• Stock: Remaining 95 cards, face-down
• Waste: Cards drawn from the stock land here, top card playable
• Foundations: 8 piles - 4 start with an Ace, 4 start with a Two (one of each suit per group)

Foundation Building Rules

• Ace Foundations (4 piles): Start with an Ace and build UP by twos in the same suit: A→3→5→7→9→J→K, then wrap around: →2→4→6→8→10→Q (13 cards)
• Two Foundations (4 piles): Start with a Two and build UP by twos in the same suit: 2→4→6→8→10→Q, then wrap around: →A→3→5→7→9→J→K (13 cards)
• By Suit: Each foundation takes only one suit, fixed by its starting card
• Wrapping: After the King comes the 2, after the Queen comes the Ace - the sequence passes the top of the deck exactly once
• Complete Set: Each finished foundation contains all 13 ranks of its suit; the Ace pile and Two pile of a suit together consume both decks' copies of that suit

Reserve Rules

• Nine Spaces: The reserve holds 9 single face-up cards
• No Building: You cannot move cards between reserve spaces or build sequences on them - reserve cards can only be played to foundations
• Automatic Refill: When a reserve card is played, its space refills immediately from the top of the waste pile, or from the stock if the waste is empty

Stock and Waste Rules

• Drawing: Turn one card at a time from the stock to the waste
• Top Card: Only the top waste card can be played to foundations
• One Redeal: When the stock runs out, the waste may be turned over ONCE to form a new stock - you get exactly two passes through the cards

Winning Strategy for Odd and Even Solitaire

1. Learn the Two Ladders Cold

Fast play depends on instantly knowing what each foundation needs next:

• Ace ladder: A, 3, 5, 7, 9, J, K, 2, 4, 6, 8, 10, Q
• Two ladder: 2, 4, 6, 8, 10, Q, A, 3, 5, 7, 9, J, K
• Every foundation always needs "top card plus two" - after a 9 comes a Jack, after a King comes a 2
• Memorize the wrap points (K→2 and Q→A); they are where most players stall

2. Start Foundations Early

Aces and Twos are pure gain - play them the moment they appear:

• Each started foundation opens a new destination for the cards flowing through the reserve and waste
• With two decks there are eight Aces and eight Twos, but only one Ace and one Two of each suit start foundations - the duplicates must wait for the wrap
• A late-started foundation means more cards stranded in the waste on your first pass

3. Use the Reserve as a Filter

The automatic refill makes the reserve your main engine:

• Every reserve card you play pulls a replacement out of the waste or stock - playing reserve cards effectively lets you "see" more cards
• Prefer playing from the reserve over the waste when both are legal: the reserve refill digs you deeper into the deck
• Watch what refills each space; a fresh reserve card can chain into another foundation play

4. Manage Your Two Passes

You go through the stock at most twice, so pace your draws:

• Before drawing, check every reserve card and the waste top for legal plays
• Cards buried in the waste are not lost - they come back in the same order on the redeal - but they are frozen until then
• On the second pass, play everything you legally can: whatever you skip is gone for good

5. Track the Duplicates

Two decks mean every card exists twice, and both copies matter:

• Each rank-and-suit combination has exactly two homes: one on the suit's Ace foundation, one on its Two foundation
• If both foundations of a suit currently need the same rank (it happens after the wrap), the two copies each have a slot - play them freely
• If only one foundation needs a card, think about whether the second copy will be reachable when its turn comes

6. Know the Endgame Arithmetic

• Each foundation ends at 13 cards; 8 × 13 = 104 - a perfect clear uses every card
• The Ace pile of a suit ends on a Queen; the Two pile ends on a King
• Counting "I still need both black Queens and one red King" tells you exactly what to fish for on the final pass

Common Odd and Even Mistakes

Mistake 1: Forgetting the Wrap

New players treat the King (or Queen) as the end of the sequence and stop feeding a foundation. The ladder wraps: after K comes 2 on Ace piles, and after Q comes A on Two piles. A "finished-looking" pile at 7 cards is only halfway home.

Mistake 2: Drawing Before Checking the Reserve

Every draw buries the waste one card deeper. Scan all nine reserve cards and the waste top for legal plays before you touch the stock - the reserve refill often surfaces the card you were about to dig for.

Mistake 3: Wasting the Redeal

You get one redeal, not unlimited cycles. Racing through the first pass without playing everything available means facing the second - and final - pass with fewer foundations started and fewer destinations open.

Mistake 4: Ignoring the Second Copies

Playing the first copy of a card thoughtlessly can strand the second. Both copies of every card are needed for a perfect clear, so note where duplicates are as they pass through the waste.

Frequently Asked Questions

Can I move cards within the reserve?

NO - the reserve is nine independent single-card spaces. Cards move from the reserve to foundations only, and each emptied space refills automatically from the waste (or the stock when the waste is empty).

How many times can I go through the stock?

Twice. The stock is dealt one card at a time, and when it runs out the waste is turned over once to form a new stock. After that second pass there are no more redeals.

Does this game really use two decks?

Yes - Odd and Even is a classic two-deck patience (104 cards). That is why there are eight foundations: an Ace pile and a Two pile for each of the four suits, and each finished pile holds 13 cards.

Do suits matter?

YES - every foundation builds in a single suit, fixed by its starting Ace or Two. A 5 of hearts can only go on a hearts foundation that currently shows a 3 of hearts.

Why is this game called "Odd and Even"?

The name describes the two foundation ladders. Ace foundations climb the odd ranks first (A, 3, 5, 7, 9, J, K) before wrapping into the even ranks, while Two foundations climb the even ranks first (2, 4, 6, 8, 10, Q) before wrapping into the odd ranks. Building by twos is what makes the game feel so different from suit-ladder solitaires like Klondike.

How hard is Odd and Even compared to Klondike?

It plays faster but less forgivingly. There is little maneuvering - success comes from starting foundations early, using the reserve refills well, and making the most of your single redeal. Careful players win considerably more often than careless ones.

Can I restart if I get stuck?

Yes! If the stock is spent, the redeal is used, and nothing can be played, the game is over - restart the same deal or start a fresh one and apply what you learned about pacing your two passes.

Challenge your numerical sequencing skills - play Odd and Even Solitaire now!