Budapest Gambit, Fajarowicz Variation

A gambit is a deliberate offer of material, usually a pawn, in return for time or activity. In this line, Black first develops the g8-knight to f6 and then offers the e-pawn by advancing it to e5. If White captures, that knight jumps from f6 to e4. Coordinates such as e4 name a square by its file and rank.

The knight on e4 occupies an active central square and makes the natural development of White's b1-knight less convenient. Black often brings the bishop to b4 with check, develops the other knight to c6, and places the queen on e7. This activity can create tactics, meaning short sequences based on checks, double attacks, or undefended pieces. Black nevertheless remains a pawn down until the pawn is recovered or enough compensation is gained. Compensation means activity, time, and threats that offset the missing material.

White does not need an immediate refutation. The practical priorities are development, king safety, and deciding whether keeping the extra pawn delays coordination too much. Returning it can be sensible if that completes development with a safe position. The Fajarowicz becomes much less dangerous when White checks every forcing move rather than responding automatically.