This paper is wrong in section 4.1:
>The first click of a Minesweeper game deserves special attention since it is rather unique. >Namely, the opener is always a guess because the player starts with a covered board. >In addition, the challenges associated with the opening move are unavoidable and are shared among all solvers. Thus, finding an optimal policy for dealing with the initial click will benefit every approach
The first click of a Minesweeper game is always safe[1]