This is not a guide to tactics but a request for stories of when an opponent (or yourself) has used such excellant tactical planning that he/you left you/him with your/his mouth hanging open and his/your army in tatters. I have played against a championship chess player, every move I seemed to make was futile and seemed to fall directly into his plans. He had plans within plans within plans and left me feeling that he could have annihilated me with half the number of pieces. Has anyone ever had this experience in 40K?

This is not for stories of insane luck or improbability, but for stories of when you have been truly humbled by a masterful player.