Rubuta ci gaba don wannan sakin layi - Böök ya buga da yawa daga cikin manyan 'yan wasan duniya, kuma yana da rikodin ƙari akan Miguel Najdorf (+ 1 -0 = 2). Ya doke Max Euwe tare da baƙar fata a Dubrovnik a 1950, da kuma dan wasan chess na Estonia Paul Keres a gasar Olympics ta Helsinki ta 1952
Ka yi haƙuri.