How to Win Hnefatafl: Both Sides' Win Conditions

You win hnefatafl in one of two ways depending on your side. The defenders win the moment their king reaches a corner square. The attackers win by capturing the king, in Copenhagen by surrounding him on all four sides. Each side’s entire strategy flows backward from its own win condition.

Know exactly what wins, first

An astonishing number of hnefatafl games are lost by players fuzzy on their own goal. So, precisely, in Copenhagen Hnefatafl:

The defense wins when the king stands on any corner square, or when the king achieves an exit fort (walled safely on the board edge with room to move), or when the attackers have no legal move.

The attack wins when the king is captured, or when every remaining defender is sealed inside an unbroken attacker ring, or when the defense has no legal move. The full formal statements are in the Copenhagen rules reference.

Notice what’s missing: material. Nobody wins by capturing soldiers. Captures are means, never ends, and the player who forgets that trades pieces while the opponent quietly wins the game.

The defenders’ core plan: two threats, one king

The defense’s plan fits in a sentence: create two escape routes the attackers can’t close with one move each. A king with a single open path to a corner gets that path shut. A king positioned where he threatens two different corners forces the attackers to defend both at once, and they only get one move per turn. That arithmetic is the whole defensive game.

In practice it unfolds in phases. Early, keep the king home and use soldiers to fight for one quadrant of the board, ideally wherever the attackers coordinate slowest. Middle, open a lane and post the king where his rook-range covers two corner approaches. Then wait for the attackers to commit to sealing one side, and go the other way. Defenders lose by moving the king out early with one plan and no second option; the defender strategy guide covers timing in detail.

Soldiers exist to spend. Every defender is fuel for the king’s escape, and a defense that ends the game with many soldiers and a captured king has misallocated completely.

The attackers’ core plan: seal, then squeeze

The attack wins with a wall, not a chase. Chasing the king with capture attempts feels active and almost never works; he’s as fast as any piece on the board, and near-miss traps just spend tempo. The winning shape is a closed ring around the defense with all four corner approaches blockaded. Once no exit exists, the squeeze is slow and almost automatic: tighten square by square until the king’s four sides can be occupied.

So the attackers’ opening isn’t about captures at all. It’s about connecting the four starting camps into one perimeter and putting stones on the corner diagonals early. The classic beginner failure as the attacker is winning the capture count while leaving one corner route open; the game ends abruptly and the material lead means nothing. Blockade first, capture second is the whole doctrine, expanded in the attacker strategy guide.

One refinement worth knowing early: attackers should watch the defenders’ soldier formations for encirclement wins. Sealing the whole defense inside a ring wins outright in Copenhagen, and sometimes that’s easier than taking a slippery king.

What winning looks like in other variants

The two-plans structure holds across the family, but the balance of difficulty shifts with the rules. Where the king escapes to an edge rather than a corner, as in the traditional reconstructions of Tablut and Brandubh, the attackers must hold the entire perimeter, and their wall-building becomes far more demanding. Where the king is capturable on two sides instead of four, the defense must escort him cautiously instead of deploying him as a fighter. Same plans, different tolerances. Check each variant page for its exact conditions.

Put the plans into practice against the engine on the homepage; the strategy hub goes deeper on both sides once the basics feel solid.