Fritz is very adjustable. You can defintely adjust it's playing strength by setting a numerical handicap, or by simply limiting it's thinking depth (ply).
Personally, I think Chessmaster is the best software for the purpose of learning/training. It has the most structured tutorials. It literally holds your hand through everything from learning how to move the pieces to complete breakdowns of grandmaster games.
ok, kkbell, thanks for the tip. i'll look into chessmaster.
You can also use a rating "slider" to adjust Fritz 13 to whatever playing strength you think you need. How effectively that mimics a human opponent is open to debate, but it is "infinitely" adjustable in terms of its own internal rating level. Personally, I like Fritz 13 because of its other strengths. There are many alternate tutorial methods available here and elsewhere online which gives a far greater spectrum of options rather than evaluating one program against another.
It seems that it is possible to adjust the playing strength of shredder 4 making the experience better.
Is this also possible in Fritz.
Also, what are the best software for the purpose of learning/training against?