Listen.. When I started isomerism I was shocked how the questions are so imaginative, how do people do this..
TRUTH I LEARNT : PEOPLE DON'T
The thing is only for advanced level questions there is lot of imagination.. Rest are all tricks..
The only thing to imagine in this chapter comes in converting sawhorse to Fischer or telling if Sawhorse is S and R, rest everything can be done by tricks..
So please learn the tricks from LG WADE, or some textbook, as they will solve 85% of ur doubts by just knowing formula type methods..
These are not some JEE tricks, these are tricks used by even foreign authors to accurately predict S R notation in Fischer protection or Chirality of molecules, it's a standard norm which I didn't know when I started the chapter so I couldn't solve the qs