law all_safe_set_mine

minebender-game@1.0.0.0 · proof_inv.bend:524

import Base
import minebender-game@1.0.0.0/types.bend as T
import minebender-game@1.0.0.0/board.bend as B
import minebender-game@1.0.0.0/game.bend as G

524law all_safe_set_mine:
525  for +w: Nat
526  for +h: Nat
527  for +layout: T.Grid(Bool)
528  for +shown: T.Grid(Bool)
529  for +p: T.Pos
530  for +mp: {B.mine(layout, p) == True{} : Bool}
531  {G.all_safe(w, h, layout, B.set_at(Bool, shown, p, True{})) == G.all_safe(w, h, layout, shown) : Bool}