def checkCornersForBoats(x:Int, y:Int): Boolean = {
   val boardSize = scala.math.sqrt(allSquares.length)
   val A = getSquare(x-1,y-1)
   val B = getSquare(x-1,y+1)
   val C = getSquare(x+1,y-1)
   val D = getSquare(x+1,y+1)
   for(x<-List(-1,1)){
     for (y<-List(-1,1)){
      if (x<0 || y<0 || x>boardSize || y>boardSize){
        if (!A.possibleValues.contains("-")){
          //setWater()
          return true
        }
        if (!B.possibleValues.contains("-")){
          //setWater
          return true
        }
        if (!C.possibleValues.contains("-")){
          //setWater
          return true
        }
        if (!D.possibleValues.contains("-")){
          //setWater
          return true
        }
        else return false
      }
     }
   }
   return false
 }