[White "   Kozul - Eljanov, Bosnia, 2005   "]   [Black "Black to play and win"]   [Result "1-0"]   [FEN "r5k1/2p1qppp/1p6/3P4/r1N1Pb1n/1Q5P/1BR1R1P1/6K1 b - - 0 1"]   {Black has a very nice exchange sacrifice available that wins:}   1 ... Ra1+ 2 Bxa1 Rxa1+ 3 Kf2 Qf6!   {And this creates decisive threats:       Two sample lines are:}   4 Rc3 {the best defence}    (4 Ne3 Bh2+ 5 Nf5 Bg1+ 6 Kg3 Qg5 {mate})    Bg5+ 5 Rf3 Nxf3 6 Qxf3 Bh4+!   {Black wins in other variations as well.}