Play CardsWar — the complete rules

War rules

War is the simplest card game in the world: split the deck, flip cards, and the higher card takes the battle — until two equal cards collide and a war breaks out. This rulebook pins down the details most people argue about: exactly how wars escalate, where captured cards go, what happens when someone cannot finish a war, and the rare ways a game can draw.

Players2 players (you vs the computer)
DeckStandard 52-card deck, no jokers
Object of the gameCapture all 52 cards. Your opponent running out of cards is your victory.

Play War free →These are the exact rules the game enforces.

Setup & the deal

The shuffled deck is split evenly: 26 face-down cards each, forming each player’s main stack. Alongside the main stack, each player also keeps a won pile (side stack) that starts empty — captured cards will collect there. There are no hands, no choices, and nothing hidden that matters: War plays itself, and you supply the suspense.

Cards rank from 2 (lowest) up through 10, Jack, Queen, King — with Aces high, above the King. Suits and colors never matter: when a battle is decided, only rank is consulted, and when ranks match, nothing breaks the tie except war itself.

Because there are no decisions, the entire game is determined the moment the deck is cut in half — every flip merely reveals what the shuffle already decided. That is not a flaw; it is the point. War is a spectator sport you happen to be playing in, and the flip button (or auto-play) is your seat at the ringside.

How to play

Each round is a battle: both players flip the top card of their stack face up. The higher card wins, and the winner captures both cards. Equal ranks mean war:

  1. Each player deals three cards face down onto the table — the buried cards.
  2. Each player then flips one more card face up — the war card.
  3. The higher war card wins everything on the table: both original fighters, all six buried cards and both war cards.
  4. If the war cards tie again, the war escalates: another three down, another one up, with the whole growing pile going to the eventual winner. There is no limit to how many times a war can chain.

A worked example: you flip a 9, the computer flips a 9 — war. Both sides bury three cards and flip again: your Queen against its 7. You capture all ten cards on the table — two 9s, six buried cards and both war cards. Had the Queen and 7 been another matched pair instead, the war would simply have escalated: three more down, one more up, eighteen cards riding on a single flip.

Captured cards go onto the winner’s won pile in capture order — never shuffled. When a main stack runs out, the won pile is simply turned over and becomes the new main stack, exactly as you would flip a pile of cards in your hands. This happens seamlessly, even in the middle of a war.

Winning & losing

Every way a round — and the game — can end
SituationResult
One card outranks the otherHigher card captures everything on the table
Equal cardsWar: 3 buried + 1 flipped each, winner takes all
War cards equal againThe war chains: 3 more down, 1 more up
A player cannot field 4 cards for a warThat player loses immediately
Neither player can complete the warMost cards wins; equal counts = draw
A player reaches 0 cardsThe other player wins
Round 2,000 arrives with no winnerMost cards wins; equal counts = draw

The headline rule people forget: a war demands four cards — three down and one up. A player holding fewer than four cards (main stack and won pile combined) when a war breaks out cannot complete it and loses on the spot. Riches count for nothing if you cannot pay a war’s entry fee.

Because captured cards are never shuffled, a game of War can settle into repeating cycles that would spin forever. Our game ends marathon matches at 2,000 rounds: whoever holds more cards wins, and equal armies make the game one of the few card games anywhere that can genuinely end in a draw. In practice most games finish decisively long before the cap — the counter exists for the pathological deals, not the ordinary ones.

Edge cases & fine print

  • Aces beat Kings. Rank is the only tiebreaker that exists; when ranks are equal, no suit order steps in — it is war, every time.
  • The winner takes the buried cards too. All face-down war cards join the spoils; their identities go to the winner sight unseen.
  • The won pile turnover preserves order. Flipping the won pile puts the first-captured card on top — the deck cycles in capture order, which is exactly why unshuffled War can loop.
  • Turnovers can happen mid-war. A player may exhaust their main stack while burying war cards; the won pile flips over immediately and the war continues without pause.
  • Both players short is decided by count. In the freak case where neither side can complete a war, the bigger remaining army wins and equal counts are a draw.
  • The battle log stays visible. After each round the fighters and the size of the spoils remain on screen until the next flip, so instant resolutions never vanish before you see them.
  • Round and war counters track the carnage, and auto-play fast-forwards the quiet stretches — you can take back control at any time.

Variants

We play the cardgames.io ruleset: aces high, three-down-one-up wars, unshuffled won piles, immediate loss for an incomplete war, and the 2,000-round cap. Family and regional variants abound:

  • Shuffled won piles — many households shuffle captured cards before reusing them. It feels fairer but actually changes the mathematics: shuffled War almost surely ends on its own, while unshuffled War can cycle forever (hence our round cap).
  • One-card or spelling wars — "I-declare-war" versions bury one card per letter, or just a single card, before the deciding flip. Smaller stakes, shorter wars.
  • All-cards-forfeit wars — a harsher rule where a player who cannot complete a war surrenders their remaining cards to the table rather than losing outright; the standard rule (and ours) is the immediate loss.
  • Three- and four-player War — everyone flips, highest takes all, ties among the leaders spark multi-way wars. Chaotic and kid-approved.

Whatever the variant, the skeleton never changes: high card wins, ties go to war, and the whole drama was sealed at the shuffle. If you want a two-player battle where your choices actually matter, Go Fish and Crazy Eights are the classic next steps.

Frequently asked questions

Are Aces high or low in War?

High — an Ace beats a King and everything below it. The full order from weakest to strongest is 2 through 10, Jack, Queen, King, Ace. Suits never matter.

Can a game of War end in a draw?

Yes, two ways: the 2,000-round cap arrives with both players holding exactly 26 cards, or a war breaks out that neither player can complete while holding equal counts. Both are rare — most games end with one side capturing everything.

How many cards are at stake in a double war?

Eighteen. Each player commits one original fighter, then three buried plus one war card per war round — nine cards each across a double war — and the winner scoops all of them.

What order do captured cards come back in?

Capture order. Spoils land on your won pile as they are taken, never shuffled, and when your main stack empties the won pile flips over with the first-captured card on top.

Why does it matter that the won pile is never shuffled?

Unshuffled decks cycle in fixed patterns, so a game can theoretically loop forever — that is why a round cap exists at all. It also means the same clumps of cards tend to meet again, which is why win streaks feel streaky.

What happens if my deck runs out in the middle of a war?

Nothing dramatic — your won pile is turned over and becomes your deck mid-war, and the burying continues. You only lose if your deck and won pile together cannot supply the four cards a war demands.

I had more cards than my opponent and still lost — how?

You almost certainly hit a war you could not complete. The 3-down-1-up entry fee is absolute: fewer than four cards total when a war starts is an instant loss, no matter the score a moment earlier.

Is the 2,000-round cap part of traditional War?

No — traditional unshuffled War simply has no guaranteed ending, which is fine on a rainy afternoon but not in software. The cap ends marathon games by card count, with equal counts declared a draw.

Related rulebooks

Last reviewed 2026-08-05 · play War online free