Treaty Couriers

Deliver an exact +8 treaty to the western court and an exact −8 treaty to the eastern court, each stamped at the central embassy. Select courier A or B, then move one square with the direction buttons. A courier absorbs only a parcel equal to its current signed value, doubling the carried message. Unequal parcels block movement. Entering the central embassy stamps the message AND reverses its sign every time, so the couriers must cross toward the opposite court after completing their local pickups. Couriers cannot share a square. The western and eastern corner courts accept only the exact signed value with a stamp; a wrong or unstamped delivery causes a diplomatic loss. Both deliveries must finish within twenty-four total steps. Switching couriers is free. Keyboard: Tab and Enter/Space operate buttons; R restarts.