[White "Daily tactics #1"]   [Black "Black to play and win"]   [Result "1-0"]   [FEN "8/pR4pk/1b6/2p5/N1p5/8/PP1r2PP/6K1 b- - 0 1"]   { This one is particularly nice. Black first sacrifices the rook.}  1... Rxb2!! 2 Nxb2   {Then he continues with the obvious}  2 ... c3 {Now White can't play 3 Nd3 with the idea of Nc1, because c4+ wins. Therefore, only other try for White is the immediate rook sacrifice.}    3 Rb6! (3 Nd3 c4+ 4 Rb6 cxd3 {Black's pawns are unstopabble.})   {Now if Black captures the rook, Nd3-Nc1 is possible. Therefore}   3 ... c4!!   {An amazing move. Black simply takes the d3 square away from the knight.}   4 Rb4!   {The only White try. Convince yourself that all other rook moves lose immediately.   And now what? Both  4... cxb2 5 Rxb2  and  4... c2 5 Rxc4  lose for Black. But he has a winning move.}   4 .... a5!!   {An amazing move. Black simply takes the b4 square from the White rook. Now if  5 Rxc4 cxb2  and the pawn is unstoppable, since there is no Rb4. And on any other Rook move there follows c2 and Black pawn promotes.   Fantastic!!   P.S. If you have any opinions, suggestions or variatons, please let me know in the comment section below :)}