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Created April 27, 2013 00:07
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Abridged rules of Diplomacy.

Diplomacy Rules

Winning

If one player controls 18 or more supply centers the game ends. If all remaining players agree to peace they all win.

Turn Sequence

Turns alternate between Spring and Fall, starting with spring 1901.

Spring Turns

  1. Diplomatic
  2. Order Writing
  3. Order Resolution
  4. Retreat and Disbanding

Fall Turns

  1. Diplomatic
  2. Order Writing
  3. Order Resolution
  4. Retreat and Disbanding
  5. Gaining and Losing Units

Phases

1. Diplomatic

Players talk and coordinate orders. Suggested limit to 15 minutes.

2. Order writing

Players write orders for their units. No unit can be given more than one order per turn.

Order Format: [A|F] Province [Order]

A unit not given an order is assumed to hold.

3. Order Resolution Phase

All orders are revealed. In turn each player reads their orders. If an order given by one player would effect another players order or unit that player must bring it up. At that time legal orders will be resolved, and orders that fail should be crossed out.

4. Retreat and Disbanding

After all moves have been resolved or marked as illegal dislodged (defeated) units retreat or are disbanded. Units can retreat to any province they could normally move to, with these exceptions

  • the province from which the attacker came
  • a province that was left vacant by a standoff during the same turn.

Retreats are ordered simultaneously, and written down if necessary. If two units are ordered to retreat to the same location they are both disbanded.

5. Gaining and Loosing Units (fall only)

Gain/Loose supply centers

Players gain control of supply centers if they occupy the province it is located in at the end of a fall turn.

Building/Disbanding Units

Players count the number of supply centers the control. They then build or destroy units so that they control the same number of units as supply centers.

Units can only be built in supply centers in a players home country. If a province is occupied a unit cannot be built there. Only one unit can be built per supply center per turn. Fleets can only be built in coastal provinces

Orders

Orders that fail should be underlined

Hold

[A|F] location [holds|h]

Unit at location stays where it is.

Move (attack)

[A|F] location destination

Unit at location attempts to move to destination.

Armies can be ordered to move to any adjacent land province Fleets can be ordered to move to any adjacent water provinces, as well as adjacent coastal provinces. When a fleet is in a coastal province it is considered to be on the coast, it cannot move to provinces who's coast is not contiguous with the coast occupied by the fleet.

  • Units of equal strength trying to occupy the same province cause all those units to remain in their original provinces. This is called a standoff
  • A standoff does not cause a holding unit to be dislodged.
  • Two units cannot swap places
  • Three units can cycle as long as none swap places

Support

[A|F] location S [A|F] supported destination [A|F] location S [A|F] supported [hold|h]

Unit at location supports supported unit's move into destination.

Support can only be given to a destination that the supporting unit could move to or, if the supported action is a hold, the holding province.

A support move is only legal if destination matches the destination of the supported unit or, if the supported unit holds, no destination is given.

A support move adds the strength of the supporting unit to the supported unit without moving the supporting unit. A unit with one supporting unit has strength of 2, and will defeat any unit without support.

Cutting Support

Support is cut

  • if the unit giving support is attacked from any province except the one where support is being given. The support is cut weather the attack order is successful or not.
  • if the unit giving support is dislodged by an attack from any province

Convoy

[F] water_province C [A] location destination

A fleet in a water provinces can move one army across that province to an adjacent land province, or to another convoying fleet. The fleet has to be ordered to convoy the unit, and the unit has to be ordered to make the move.

If a fleet in a convoy is dislodged the convoy fails.

@skyggeovn
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The editor in me was compelled to make some minor edits: https://gist.github.com/estesowaelu/5474036

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