[Event "Houston (simul)"] [Site "?"] [Round "0"] [White "Fischer"] [Black "Chaney"] [Result "1-0"] [ECO "C41"] [Opening "Philidor: Philidor Countergambit"] 1. e4 e5 2. Nf3 d6 3. d4 f5 {Black opens up his kingside while he's behind in development, a formula for an early demise.} 4. dxe5 fxe4 5. Ng5 { Threatening Black's e-pawn and preventing 5...dxe5.} 5... d5 6. Nc3 { This develops a piece with gain of tempo.} 6... Ne7 { Blocking in his whole kingside.} 7. e6 {This wins at least the exchange, since Black can't do anything to keep the knight out of f7.} 7... Ng6 8. Nf7 Qf6 9. Nxh8 {Black has no appetite for 9...Nxh8 10.Nxd5, when he must lose at least another exchange. Play this out against Gambit if you don't see why.} 1-0