411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...Nf6/2. e5/2...Nd5/3. d4/3...b5/4. Bxb5/4...c5/5. dxc5/5...Qa5/6. Nd2
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O'Sullivan Gambit rd nd bd kd bd rd pd pd pd pd pd pd qd bl pl nd pl pl pl pl nl pl pl pl rl bl ql kl nl rl
Alekhine Defense: O'Sullivan Gambit
After 6...Qxb5, White does have a fork with 7. c4. Then 7...Qxc5 8. cxd5 Qxd5 and both players have equal material. However, Black still has a clearly stronger position, threatening White's g-pawn, a trade of queens which takes away White's castling rights, and Ba6! which keeps White's king in the center by preventing castling.
Theory table
.
'1.e4 Nf6 2.e5 Nd5 3.d4 b5 4.Bxb5 c5 5.dxc5 Qa5+ 6.Nd2'
3
...
d6
=
'1.e4 Nf6 2.e5 Nd5 3.d4'
3
...
e6
=
References
Alekhine's Defence