Can a defendant succeed on a claim of ineffective advisory counsel?

To succeed on a claim of ineffective advisory counsel, a defendant's claim must go to the narrow role of advisory counsel, not to the adequacy of the [200 Cal.App.3d 865] defendant's own representation or to trial strategy matters within his control. Matters which can be explained as a choice of trial tactics (no matter how poor a choice of tactics) will not support an appellate claim of ineffective advisory counsel; advisory counsel's ineffectiveness must affirmatively appear on the record. ⁹ Additionally to succeed on such a claim, the defendant must show advisory counsel's ineffectiveness resulted in the withdrawal of a potentially meritorious defense. (Compare People v. Fosselman, supra, 33 Cal.3d at p. 581, 189 Cal.Rptr. 855, 659 P.2d 1144.)