The king's gambit accepted is a wonderful opening which was most popular in the early 1850s... a very early attack by white, this move gives white a great tempo on taking control over the weak f7 pawn. However, this opening can be countered by the Falkbeer counter-gambit (1.e4 e5 2.f4 d5). The king's gambit is not very common in the modern games as people very well know how to counter it.... if played properly, white's gambit can prove a powerful blow to his own side...For a sample of how tactical and fast, a game of king's gambit accepted can be, view the Von Der Lasa vs NN game on
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