Stefan Meyer-Kahlen  is the programmer of the computer chess program Shredder (Shredder 10 has a rating of 2824 on the November 3, 2007). Shredder on hard is at a rating of 2300. Also a GM's minimum rating is 2400 so the computer's level 10 should be near it. I think it should be :

800

975

1150

1325

1500

1675

1850

2025

2200

2375

No this is wrong. It can't beat shredder from shredderchess.com, which is 2300 on hard. Thus, it has to be somewhere on 2200 level. I think it goes like this:

800

950

1100

1250

1400

1550

1700

1850

2000

2150

On strength 10 the app beat Deep Rybka 4 playing at "2400" level in a rated game. Not definitive but interesting nonetheless.

Hi Inmaniac !

That was a very interesting post.

You say: "I've noticed that on the iPhone Chess.com app, you can play the computer and you can set its strength level from 1 to 10.  (Weird that on this site, via a browser, you can only set it to "Easy", "Medium", and "Strong" and etc)." 

I cracked the hardest (that is the hard) level of the on-line hard version as for middle august 2009 in 3 hours (after more than 20 years having not played chess). By "cracked" I mean find a strategy that won always (100% of games against the chess.com on-line computer player at this level). FYI I asked some experts at this time and their estimation was that the level of this hard level was equivalent to a 1600 human ELO ranking (therefore a very low strength). 

I have two questions that I would highly appreciate If someone could answer it. 

Does anyone knows if the on-line computer player of chess.com has been improved since august 2009 ?

Should I assume that the hard on-line level equals the iphone 10 strength level ?

To which rating does your ratings refers (you said "with another chess engine where I was able to set the rating"). ELO or what ? 

I wrote my always wining strategy somewhere and if find it would like to test it against this improved ciberplayer and get a rating.  

Thanks. 

to be more accurate can I ask what were the other engines you tested the program with. Just to name a few for good judgement I mean.

I agree. I'm ranked 600 in blitz and 1100 in standard but I can play confidently up until level 6. I have come REALLY close to beating level 6 but I have never actually done it. I find 1-2 way too easy, 3-4 comfortable, 5 hard and as I can only beat 5 once in a while and it seems to be on some fluke bad move the computer makes, and 6... Well I just explained how hard I find 6. I planned on trying to reach level 10 last month when I first started playing again for the first time in years, but is this realisic? Does anybody ever get that far up the ladder? Where do most people peak at?