I haven't repeated my tactical problemset with 2000+ rated problems since nov, 22th.
I used to have a succesrate of 100% and a solving time under 40 seconds for every problem by then.
Yesterday I repeated the set with a succesrate of 91%.
But the average solving time has increased to about 100 seconds. Which means that it takes much more time to recall the solution.
This seems to indicate that forgetting is preceded by an increase of recalling time. Or maybe we simply call "forgotten" the state where the recalling time has become unacceptable.
The balance of recalling by move sequence vs. by geometrical pattern (diagram) is changed from 60:40 to 50:50. This might be a weak indication that move sequences are more prone to fading a way in memory than geometrical patterns.
I will train with the set untill the succesrate is 100% and the maximum solving time is below 40 seconds again.
The Life and Chess of Anatoly Karpov
15 hours ago