I think you guys are going way overboard on your interpretation of what MSH said. I read it as just saying that we need to be more stubborn and stop playing into the right's games. When they continually step backwards crying "Why won't you meet us in the middle?!", stop falling for it. When they control the conversation, stop following their lead. Don't abandon dignity, but stop hand-wringing over how your opposition frames your *appearance* of dignity. Stop offering olive branches when they've been immediately used to poke you in the eye 1000 times in a row. Etc. He's not saying to play the game their way. He's saying to STOP playing the game their way.
If we want to stick with the chess analogy, the Democrat Party has for my whole adult life been playing with an opponent who says "Let me cheat or you're a meany doody head who hates America. Ok I'll stop cheating if you let me take that piece. Thanks, but I was lying! Ok I'm sorry again, but if you punish me for breaking the rules, we won't be able to move on and play a good-natured game afterwards. Thanks! I guess this means I should keep breaking the rules! What? I never admitted to breaking the rules! I think you're breaking the rules! You had this look on your face like a rule-breaker a minute ago! You were thinking about it weren't you! Also if I win this game lots of people you love will die.".... AND GOING ALONG WITH IT NEVER FUCKING LEARNING.