Puzzles #3 / If you find the winning idea, you are genius

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Avatar of Barsuj
Feel free to write down the right moves, and who didnt solve it yet, dont scroll down pls
Avatar of Barsuj

Caution! Spoilers

Avatar of KeSetoKaiba

I solved this one try, but I'm no genius. Black's king is extremely open, so I noticed the h3 rook potential to capture a3 and that's how I found Ba7+. White just has to keep bringing attackers to the open king and the checkmate must exist there.