The Royal Game of Ur

Overview

The Royal Game of Ur is roughly 4,500 years old — and unusually among ancient games, we know how to play it.

Each player races seven pieces along a path, rolling four binary dice that give a total of 0 to 4. Land on a rosette and you roll again. Land on an enemy piece in the shared middle lane and you send it all the way back to the start.

What keeps it tense is the shape of the route. Your path runs 16 squares, and nine of them are the shared lane — so more than half of every piece’s journey is spent somewhere it can be knocked back to the beginning.

A game we can still read the rules for

Sir Leonard Woolley excavated five boards from the Royal Cemetery at Ur between 1922 and 1934. The one in the British Museum is dated to about 2600–2400 BC.

The remarkable part is not the board but the instructions. A cuneiform tablet written around 177 BC by the Babylonian scribe Itti-Marduk-balāṭu records how the game was played, and it was translated by Irving Finkel, a curator at the British Museum.

So this is not a game reconstructed by guesswork. Somebody wrote the rules down — more than two thousand years after the board was buried — and somebody else worked out what they said.

The board and the route

The board is three rows deep with a narrow waist in the middle, which gives it its distinctive shape.

Your path runs up your own side, turns into the shared middle lane, runs its full length, then exits back along your own side. Sixteen squares from entry to bearing off, with the middle nine held in common.

Your own side is completely safe — the opponent’s path never touches it. Every risk in the game lives in that middle lane, and you cannot avoid it, because there is no route home that does not pass through.

The four dice

Not numbered dice. Four dice, each showing 0 or 1, added together for a total of 0 to 4.

Roll a 0 and your turn passes — so does having no legal move. That distribution is worth internalising: 2 is the commonest result, while 0 and 4 are each rare. Plans that depend on rolling a 4 will fail more often than they feel like they should.

Moving

• Move one piece exactly the number rolled. You cannot move fewer squares to make it fit.
• You cannot land on your own piece.
• You need an exact roll to bear off — nothing overshoots the end.

Those last two shape the whole game. Your own pieces obstruct you, so a bunched-up group wastes rolls it cannot use. And a piece one square from home is not safe money — it needs precisely the right number, and while it waits, it is doing nothing.

Rosettes

There are five rosettes. Landing on one grants another roll, which can chain into several moves in a single turn.

Four sit on the players’ private sides — two for each of you — and are purely a tempo bonus. The fifth sits in the middle of the shared lane, and it is the most valuable square on the board: a piece resting there is safe from capture.

It is the only protected square on the contested lane, it grants an extra roll, and it sits squarely on the route both players must take. Taking it is often worth more than the distance it gains you.

Capturing

Land on an enemy piece anywhere in the shared lane and it goes back to the start — the whole journey again.

That is a swing of up to eight squares of progress in one roll, which is why the game can turn so fast. But entering the lane to threaten also puts you inside their range. Before you attack, work out what they need to roll to answer, and remember that 1, 2 and 3 are all far likelier than 4.

Strategy and tips

• Take the central rosette when you can. Safety, an extra roll, and a chokepoint on the shared lane in one square.
• Spread your pieces. You cannot land on your own, so a cluster turns good rolls into dead ones.
• Do not advance the leading piece by reflex. If it needs an exact 3 to come off and you rolled a 1, spend the 1 somewhere useful.
• Keep varied distances near the end. Several pieces all needing the same exact number is how a won race stalls.
• Weigh the lane by odds, not fear. Being reachable by a 4 is far safer than being reachable by a 2.
• Chain rosettes. An extra roll is a free turn — when two moves are close in value, take the one that lands on a rosette.

The computer opponent

Three levels, and this one works differently again from the other board games here. The search depth is fixed — what changes is the thinking time and, at the top level, what the engine actually values.

Vs AI — Hard is the only level that switches on the extra evaluation terms for shared-lane safety and bearing off. Easy and Medium play the position; Hard plays the risk as well, and will decline a tempting capture that would leave it exposed.

Pass & Play

Local Pass & Play hands one device between two people. Everything is visible, so it reads well across a table.

Online multiplayer against a remote opponent is available in the Android and iOS apps. The browser version plays against the computer or a friend beside you.

Controls

• Tap Roll to throw the four dice.
• Tap a piece to select it, then tap a highlighted square to move it exactly that many steps.
• Choose the AI level or Pass & Play from the menu, and restart at any time.

Seven pieces, four binary dice, five rosettes and a shared lane you cannot avoid. Four and a half thousand years old, and it still turns on one decision: when to step into the middle.

If you liked The Royal Game of Ur

Ludo Card Sprint is the modern descendant of the same idea — race your pieces home, send opponents back when you land on them — with cards replacing the dice.

For the strategy without the luck, Nine Men’s Morris and Checkers are the classic abstracts, and Kono is a pure race with no dice and no captures at all.