PROOF.open_over: law of minebender-game@1.0.0.0
Import: import minebender-game@1.0.0.0/PROOF.bend as PROOF
Lines 45-50 of minebender-game@1.0.0.0/PROOF.bend: https://jend.leeeet.dev/read.txt?path=minebender-game@1.0.0.0/PROOF.bend&start_line=45&end_line=50

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

# In a finished game, opening a cell changes nothing.
law open_over:
  for +g: G.Game
  for +p: T.Pos
  for +over: {G.is_playing(G.status(g)) == False{} : Bool}
  {G.open(g, p) == g : G.Game}

Uses (11):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/board.bend&name=mine
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/game.bend&name=Game
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/game.bend&name=is_playing
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/game.bend&name=open
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/game.bend&name=open.go
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/game.bend&name=status
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/game.bend&name=unrevealed
  https://jend.leeeet.dev/definition.txt?path=minebender-game@1.0.0.0/types.bend&name=Pos