Chess Opening Theory/1. e4/1...a6/2. Bc4

= St. George Defence =

2.Bc4
It's tempting for Black to play /2...b5/ but it's a trap : 3. Bxf7+ Kxf7 4. Qh5+!. If now 4. ... Kf6?? then 5. Qf5#, 4. ... Ke6?? transposes to the same line after 5. Qd5+ Kf6 6. Qf5# checkmate. The only evasion of mate is 4. ... g6 5. Qd5+ any 6. Qxa8 and White wins a rook.

Instead, /2...e6/ is sound. 2. Nf6 is good too : 3. e5 d5

Theory table
.

'1.e4 a6 2.Bc4'