C21
Center Game: Halasz-McDonnell Gambit
1. e4 e5 2. d4 exd4 3. f4
The Center Game: Halasz-McDonnell Gambit is a chess opening classified under ECO code C21. It is reached after the moves 1. e4 e5 2. d4 exd4 3. f4.
It belongs to the Center Game family — one of many ways the line can branch. Understanding the parent system’s plans is the fastest way to play this variation well.
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