411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...Nf6/2. e5/2...Nd5/3. d4/3...b5/4. Bxb5/4...c5
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O'Sullivan Gambit rd nd bd qd kd bd rd pd pd pd pd pd pd bl pl nd pl pl pl pl pl pl pl pl rl nl bl ql kl nl rl
Alekhine Defense: O'Sullivan Gambit
Black now threatens Qa5+ to threaten the bishop with check. Thus, 5. dxc5? is a mistake. The most common ways to deal with Qa5+ is 5. Bc4, c4, or c3.
Theory table
.
'1.e4 Nf6 2.e5 Nd5 3.d4 b5 4.Bxb5 c5'
3
...
d6
=
'1.e4 Nf6 2.e5 Nd5 3.d4'
3
...
e6
=
References
Alekhine's Defence