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The first one can be found in the Alekhine Defence: 1. e4 Nf6 2. e5 Nd5 3. d4 b5!?
The second one is most logically reached via the Benko Opening move order (Black can swap his first two moves): 1. g3 d5 2. Bg2 e5 3. b4!?
Any information on them in any videos or literature?
Google: "wing gambits" - you wont find much on them specifically, but if you search "wing gambits" you should find a lot of information about the type of game that they lead to ;)
Thanks, I'll try it!
Hmm... turns out googling the Wing gambits won't suffice, because everywhere on the Internet it's universally given that they would mean a b2-b4/b7-b5 push only in response to c5/c4 by the opponent (or Bc5/Bc4 in the style of the Evans Gambit). Also, in this absence of useful information I've realized I need precise data about these exact openings, rather than arising game types. But thanks again anyway.