What about cxb2 instead of axb2, you cannot pin a pawn anymore.
If 1. Rg7 cxb2 (avoiding your mate in 3) 2. Rb7 b1=Q+ (only move) 3. Rxb1+ axb1=Q+ 4. Qxb1#
The silent move 1. Rf2 cxb2 OR axb2 2. Rf1+ b1=Q (forced) 3. Rxb1+ axb1=Q+ 4. Qxb1#
Will also give the same result, but there is less to calculate.
no. because the black pawn in h2 will take your rook.
Well, that's ok. You can go back to this puzzle every now and then and i am sure you will suddenly get the solution. For the moment you may try solving my other puzzles i had already posted. They were simpler but also enjoyable.
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