A second trick
Tunnelvision. Now I'm over my anger about Bent Larsen's silly move, I see that there is something interesting in it. This was the diagram what the rage was all about. The instruction was: find the positional plan. I set it up at a board and analysed the position for two hours without reaching a definite conclusion. When I looked at the solution it said this is a mate in 3. It costed me 20 seconds to solve it. What does this mean? Since I solved it in 20 seconds, the pattern must be very familiar. I mean, I have probably exercised between the 20 and 50 knight sacs a day the past 3.5 year, so how could it be otherwise? But I don't associate a knight sac with a positional plan. So the instruction sets a filter over the candidate moves. At which moment did this filter work? Was the move filtered BEFORE it appeared in my brain, or appeared the move and was it dismissed? I can't remember exactly. I postulate that this tunnelvision is the common state of mankind. Not only fi...