Tactic 0102

[Event "World Championship Match"]
[Site "Baguio City"]
[Date "1978.07"]
[Round "8"]
[White "Karpov"]
[Black "Korchnoi"]
[Result "1-0"]
[Annotator "JB"]
[SetUp "1"]
[FEN "4rk2/2p2prp/pq2b2N/1p6/8/2PR1Q2/PP4PP/5R1K w - - 0 26"]

{White to move, black just played Rg7. }
{Second best is Re3 (1.51), best is Rd7 (8.73) }
1. Rd7! Rb8 {If Bxd7 then Qxf7+, followed by Rxf7# }
2. Nxf7 Bxd7 {The computer gives this line as the best black can do: }
(2... Qb7
3. Qxb7 Rxb7
4. Nd8+ Ke8
5. Rxg7+ Rb6
6. Nxe6 Rxe6
7. Rxc7
)
3. Nd8+ {and Korchnoi resigned. }
1-0