The turtle back cannon 龟背炮 is considered to be an unorthodox opening against the central cannon. It is seldom seen in competition but it is still interesting to know it. Other names for this opening include the phoenix cannon counter凤凰炮.
This is basically what is given in some of the ancient manuals, though there is not much discussion.
As I am sure you will get lost again, I have posted 3 boards for you look through the variations.
First created: May 2011
Last updated: 22nd Nov 2011
The unsung hero who did this board!
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