Chess Opening Theory/1. e4/1...b6/2. d4/2...Bb7/3. Bd3/3...f5

= Matovinsky Gambit =

3...f5
Offering white the f-pawn, in exchange for exposing white's unprotected g-pawn and cornered rook. White can now play:
 * 4. exf5, accepting the gambit and exposing white's unprotected g-pawn and cornered rook
 * Or, white may decline the gambit by not playing 4. exf5

Theory table
'''1.e4 b6 2. d4 Bb7 3. Bd3 f5'''