Barnes Defense

The Barnes Defense, 1. e4 f6, is generally regarded as one of Black's weakest first moves. The pawn advance opens no line for the queen or either bishop, takes the natural f6 square away from the g8-knight, and loosens the e8-h5 diagonal while the king is still far from castling. Because nothing is threatened, White can simply occupy the center, and the engine gives White a clear advantage.

The move is sometimes justified as preparation for ...e5, but it supports that square poorly. After 2. d4 e5 3. dxe5 fxe5 4. Qh5+ g6 5. Qxe5+ Black loses a pawn and the rook on h8 comes under fire, the same tactical weakness that afflicts the Damiano Defense. The diagonal to e8 is more sensitive still: 2. d4 g5?? allows 3. Qh5#, the Fool's Mate pattern.

Black therefore has to develop by slower means. One scheme is ...g6 and ...Bg7, steering toward a Modern Defense setup and later moving the f-pawn out of the bishop's way, with the king's knight rerouted via h6 to f7. The other is ...e6 and ...Ne7 followed by ...d5, giving the game a French Defense flavor. In either case White has time to build a lead in development.

2. d4 is the most frequent reply, ahead of 2. Nf3 and 2. Nc3; the engine also lists 2. Ne2 among its preferred choices. A provocative alternative is 2. Qh5+, after which 2...g6 is forced, and 3. Be2 sets a trap, since 3...gxh5?? runs into 4. Bxh5#. In online play White scores well, though Black's results are less poor than the opening's reputation might suggest, which reflects how rarely it meets accurate opposition.

The defense takes its name from the English master Thomas Wilson Barnes (1825–1874), who used it against Adolf Anderssen and Paul Morphy and defeated Morphy with it during the American's 1858 visit to Britain, developing with ...e6, ...Ne7 and ...d5. Barnes had the best score of any opponent in his series against Morphy, and his liking for early f-pawn moves, a way of avoiding established theory, also gave his name to the Barnes Opening, 1. f3.