Tactic 0015

[Event "ICC Blitz"]
[White "jbennett"]
[Black "dagsy"]
[Result "*"]
[Annotator "JB"]
[SetUp "1"]
[FEN "1R6/R5bp/1p2rkp1/p3pp2/2P5/1P4P1/P1n2P1P/5K2 w - - 0 40"]

{White to move, black just played Kf6. }
{Second best is c5 (0.99) best is Rg8 (2.52) }
1. Rg8! e4 {Black has to surrender the bishop. }
{If Bh6, then after Rxh7 he has to }
{give up the bishop to avoid mate. }
(1... Bh6
2. Rxh7 Bd2 {Black should give up the bishop here too. }
{If Bg5, then Rf8#}
3. Rf8+ Kg5 {But mate is forced anyway }
4. f3 {A key move to prevent the King from escaping }
4... Ne3+
5. Kg1 Ng2
6. Kxg2 e4
7. h4# )
2. Rgxg7 Nb4
3. a3 Nc2
4. Rxh7 Nxa3
5. Rhf7+
*