i am sure you will enjoy this puzzle, that is if you have the patience in solving it. White to play and mate in 3. have fun.

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.

Well, it seems you didn't get the right solution. All your variations reaches 4 moves. Actually there are two lines to solve this puzzle and both of them will only reach 3 moves.

What about Rg1# echec et mat in one move?No?

ok...ok.. to much variations for this mate in 3

thegab03 wrote: What about Rg1# echec et mat in one move?No?

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no. because the black pawn in h2 will take your rook.

mcansif wrote: ok...ok.. to much variations for this mate in 3

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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.

sorry I was not switched on!