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Facility interdiction model in LINGO.
Given:
Player 2 has
a set of demand points i,
a set of supply points j, and
d(i,j) = distance or cost of supplying
demand point i from supply facility j.
Player 2 uses the rule: each demand point is assigned to the closest supply facility that is operating.

Player 1 would like to interdict/destroy the r facilities that will increase the supply costs of Player 2 the most.
Which r facilities should be interdicted by Player 1?

Reference:
Church, R., M. Scaparra, and R. Middleton(2004), "Identifying Critical Infrastructure:
The Median and Covering Facility Interdiction Problems",
Annals of Association of American Geographers, vol. 93, no. 3, pp. 491-502;