I am perusing Zirik's book again - what a cove of treasures, this is the only book you need to study for the rest of your life! I would be happy to convert and share these treasures but that requires active students, and the experience with my first Zirik lessons showed a deaf and mute crowd.
There is a heated discussion going on on the Russian site - was Mr. Zirik a 4 or 6 times Russian Champion? What happened was that twice Mr. Zirik shared the first place with another player (B. Blinder in 1957 and A. Plakhin in 1960). They played additional matches, both ending in a draw. Giants like this just do not lose games! But instead of declaring both players the winners, the Soviet bureaucrats declared NO WINNERS at all, citing "refusal to fight", did they expect the world greatest players throw games?
Answer: There is an interesting detail - both years Mr. Zirik was a defending champion, which in any other sport would have meant he retained his title by not losing to the challenger.