A large and well-organized storehouse of information in your long-term memory is one of the key difference between an amateur and pro chess players.
See Patterns of Focal Gamma-Bursts in Chess Players by Amidzic, et al.
“The brain’s medial temporal lobe struc- tures are thought to be important for the initial formation of long-term memory, and active memory is indicated by bursts of -band activity in these and other areas of the association cortex. Here we use a new technique of magnetic imaging to compare focal bursts of -band activity in amateur and professional chess players during matches. We find that this activity is most evident in the medial temporal lobe in amateur players, which is consistent with the interpretation that their mental acuity is focused on analysing unusual new moves during the game. In contrast, highly skilled chess grandmasters have more -bursts in the frontal and parietal cortices, indicating that they are retrieving chunks from expert memory by recruiting circuits outside the medial temporal lobe.”
“A chess grandmaster studies and practises for at least 10 years to learn more than 100,000 patterns (memory chunks). Consequently, grandmasters can ‘recognize’ the key elements in a problem situation much more rapidly than amateur players. Experts differ not only in the extent of their knowledge, but also in its organization. High-level processing elements, such as structuring knowledge and planning, assist in accessing the respective chunks.”
In other words, you need lots of information, and you need to make sure that information is very well organized and accessible in your brain.
There is no “royal road” to this. You have to spend the time practicing, memorizing, drilling… all the boring stuff. If there is any “secret” to mastery, it is embracing boredom.
Now go lift something heavy,