White bishop on a7 is pinned and being attacked twice and defended only once by the queen and there's no way to add another defender. c5 kicking the black bishop feels like the right way.

Guy, I'm here to provide my thoughts: The best move for white to win is Nf6+, then black will have to play Kg7. Then white plays Nh5+, then Kg6 has to be played by black. Then here is a brilliant move for white Bc2+, sacrificing the knight, black has to take Kxh5, which could potentially put black king in a disadvantages position. Then white plays d8=Q, the idea of white is, if black plays Nf7+, forking the king and queen, white can sacrifice the queen, run their king to e6, black captures on d8 check, white king continues to f5, cutting off the escape route of the black king on h5, which now the bishop will be invincible in this position, threatening to deliver a checkmate on d1. But hope is not all lost for black, black push the pawn to e2, attacking the square d1. Then white plays Be4, threatens to play checkmate on f3. Then black plays e1=N, promoting to a knight, and protecting the square f3. Then white plays Bd5, threatens to play Bc4, Be2, to deliver checkmate. Then black responses with c2, trying to promote another knight to guard the square e2. Then white plays Bc4, black plays c1=N, now black literally has 4 knights, while white's bishop is still unstoppable. Then here goes the rest of the moves: Bb5 Nc7 Ba4 Ne2 Bd1 Nf3 Bxe2 c4 Bxf3#.

@Theta A. Thanks for the information, I didn't know Levy actually has a video explaining the puzzle, I've got to check it out.

@Andrew Unthank Usually some well rated single player games, like the Witcher 3, Red Dead Redemption 2, Assassin's Creed series, and so on. I also play some blizzard games as well, like Warcraft 3, StarCraft 2, Diablo 2.

@Andrew Unthank you should definitely play it if you have the chance. It's a good game with a very good story, and you'll have a lot of hard choices (moral dilemma) to make, and the scenic view of the game and the music is grandmasters level.

When think of a good move, try again to find a better one.