Totally random blurb :)

When you use ewt too much
you start seeing 5-7-9 everywhere
:)
The ability of an ewt expert drops significantly when he/she is not able to see the simpler 5-7-9/3 structures
so I suggest studying elder for ema following
and neely for a more elaborate list of structures/rules .


http://scientificamerican.com/print_version.cfm?articleID=00010347-101C-14C1-8F9E83414B7F4945

Chunking Theory
In the 1960s Herbert A. Simon and William Chase, both at Carnegie Mellon University, tried to get a better understand-ing of expert memory by studying its limitations. Picking up where de Groot left off, they asked players of various strengths to reconstruct chess positions that had been artificially devised--that is, with the pieces placed randomly on the board--rather than reached as the result of master play. The correlation between game-playing strength and the accuracy of the players' recall was much weak-er with the random positions than with the authentic ones.

Chess memory was thus shown to be even more specific than it had seemed, being tuned not merely to the game itself but to typical chess positions. These experiments corroborated earlier studies that had demonstrated convincingly that ability in one area tends not to transfer to another. American psychologist Edward Thorndike first noted this lack of transference over a century ago, when he showed that the study of Latin, for instance, did not improve command of English and that geometric proofs do not teach the use of logic in daily life.

Simon explained the masters' relative weakness in reconstructing artificial chess positions with a model based on meaningful patterns called chunks. He invoked the concept to explain how chess masters can manipulate vast amounts of stored information, a task that would seem to strain the working memory. Psychologist George Miller of Princeton University famously estimated the limits of working memory--the scratch pad of the mind--in a 1956 paper entitled "The Magical Number Seven, Plus or Minus Two." Miller showed that people can contemplate only five to nine items at a time. By packing hierarchies of information into chunks, Simon argued, chess masters could get around this limitation, because by using this method, they could access five to nine chunks rather than the same number of smaller details.