Chess study 39
Yochanan Afek study
Yochanan Afek (1952.- ) is an Israeli chess player, composer, trainer and arbiter. He is the only person to possess international titles at five different facets of chess, being an International Master, International Grandmaster of chess composition,[1] International Arbiter, FIDE master in problem solving (2005), and International Judge for chess compositions.
The study is taken from book written by Mark Dvoretsky and Oleg Pervakov – Studies for Practical Players