Create a game and send the link to a friend — they join right in the browser.
How to play
Board: 11×11. The 4 corners and the centre throne are special — only the King may rest on them.
Move: every piece moves like a rook — any number of empty squares along a row or column. No jumping.
Attackers (24 dark) move first and try to capture the King. Defenders (12 light + gold King) try to walk the King to any corner.
Capture: trap an enemy soldier between two of your pieces (or between a piece and a corner / empty throne) along a line. You capture only by moving into the trap. A red diamond on a highlighted square means that move captures.
King capture: the King is taken only when attackers surround it on all four sides (the empty throne counts as one side). It is safe against the board edge. Traps close only on the attackers' move — the King may safely step between attackers.
Encirclement: if the attackers ever enclose the King and all remaining defenders in one unbroken ring, the attackers win.
Repetition: if the exact same position occurs three times, the defenders have failed to vary — attackers win (Copenhagen rule). Note: exit forts are not implemented, so a defender fortress cannot win by holding position — the King must reach a corner.
Win: Defenders win if the King reaches a corner. Attackers win by capturing the King, by encirclement, or by repetition. A side with no legal move loses.
Keyboard: arrow keys move around the board, Enter/Space selects and moves.
🎓 Teacher mode: on your turn, numbered arrows rank your best moves — ① gold is best, ② silver and ③ copper are alternatives; the red dashed arrow is the reply the engine expects. Single player only.
Ruleset: Fetlar-style rules (as shipped with the physical Viking Game set) plus two Copenhagen anti-stall rules: encirclement and threefold repetition. Copenhagen's shieldwall capture and exit forts are not implemented; online games are capped at 1000 moves (draw).