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And how did you go from 900 to 2307? Hours and hours solving TT?
Free trial membership. and yes. I hadn't tried TT for almost 2 years, that's why i went to 2306 (actually).
I can only dram from such rating. Well, at the moment I am working point for point, trying to calculate until the end. My problem is that I see a key move, often the right one, see a possible continuation ("he has more material, so I go for a perpetual, that's easy") and see that instead of draw I could have the queen. Or: I will queen and he cannot prevent this: great! But I make a queen (giving my opponent the initiative and probably allowing to checkmate me) instead of giving checkmate! Boy, this hurts! But I am writing everything down, a kind of list of the most stupid things you can do in TT, and hope to get used to finishing my calculations and not getting focus on the first idea I see.