The chess mentor gives full credit for alternate moves as good (or sometimes better) than the move played. However many CM lessons are not just 100% tactics like the TT
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Often in the tactics trainer, I feel like I found a pretty good move, albeit not the best one. I think it would be great if the computer could give at least a rough estimate of the strength of my move versus the correct one. That way I would know if my thinking was all wrong or if I at least found a decent move!