In his book Chess is My Life, Viktor Korchnoi wrote: “I went up to the
controller and asked whether it was legal for me to castle when my
rook was attacked. I was assured that it was. Afterwards, this
incident was cited as being an indication of how extremely tired the
players were. But in fact, out of the 2500 games that I had played,
there had never been an instance where it had been necessary for me to
castle when my rook was attacked, and I was not sure that I understood
correctly the rules of the game!”
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