> You ought not to endeavour to amuse and deceive your adversary, by pretending to have made bad moves, and saying you have now lost the game, in order to make him secure and careless, and inattentive to your schemes; for this is fraud, and deceit, not skill in the game.
I tend to see rated chess as a battle and therefore all is fair in love and chess.
I try to deceive my opponent in a few openings, simply by artifically delaying my move in openings in order to appear that my PREVIOUS move was an error on my part and that I am currently at a loss at what to do. I don't know how effective it is, but I'm low rated and all sorts of dumb schemes would work at my rating.
> You ought not to endeavour to amuse and deceive your adversary, by pretending to have made bad moves, and saying you have now lost the game
I've done a variation of this in a rated game. Like pretend I accidentally touched a piece and now am compelled to move it. Loud sigh. It was effective at least once, both of us patzers. It hadn't occurred to me that I should feel bad about it. I'm not sure I do.
Fighting is lying to your opponent.