Halasz - McDonnell Gambit C21

Unleashing the Halasz Gambit: A Chess Opening Full of Surprise

The Halasz Gambit is a chess opening marked by the move 3.f4?!, is a seldom-used Gambit dating back to the days of Romantic Chess and 19th century strategies. 

Its origins can be traced back to at least 1840, but it gained prominence through the advocacy of Hungarian correspondence chess player Dr. György Halasz.

While the gambit appears questionable, it has yet to be conclusively refuted as it falls into the category of unexplored openings with aggressive play that leads to short games.

A Chess Opening with opening venom similar to the King's Gambit in strategy, the Halasz Gambit seeks to dominate the central squares and unsettle the opponent's central pawn.

The opening moves are:

1. e4 e5

2. d4 exd4

3. f4

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Halasz Gambit Articles

Halasz Gambit: Chess Opening Guide (Main Line, Theory, History, and More) - Opening Guide - Chess Journal

Anatomy of a Gambit: Dissecting the Halasz - Old Chess Cafe Text Article (Bunch of Games at Bottom)

Unusual & Aggressive Chess Opening for White | Halasz Gambit - GM Igor Smirnov (w/Embedded Video)
Video Below Because it is Really well done and easy to follow chess tutorial.

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Halasz Gambit LiChess Studies

The Dangerously Underestimated Halasz Gambit - 6 Chapter Study  (w/Interactive Quiz) (15 Hearts)

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Game Databases

365Chess.com

C21: Halasz gambit 1. e4 e5 2. d4 exd4 3. f4 - 111 Games

Chess Tempo

Center Game, Halasz-McDonnell Gambit (C21) - 51 Games

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Halasz Gambit Video Lessons

Opening Strategy | The Secrets of Winning with 1.e4 e5 | Halasz Gambit - 30 Min

Random Guy Invents An Aggressive Gambit With 89% Win Rate! - 14 Min - GM Igor Smirnov (Video Up Above)

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Game Videos (W/ Analysis)

Blitz chess postmortem #740: Center game - Halasz gambit - 11 Min - Jim's Chess Channel