authors: 
  - Ю.Сушков
  - Сушков, Юрий Акимович
source: ЮК В.Желтоножко поч.отз.
date: 1997
distinction: HM
algebraic: 
  white: [Ke8, Qf4, Sb4]
  black: [Ke6, Pb7]
stipulation: "#4"
solution: |
  "1.Qf4-g5 ! threat:
            2.Sb4-d3 threat:
                    3.Qg5-e5 # 
                2...Ke6-d6 
                    3.Qg5-e5 + 
                        3...Kd6-c6 
                            4.Qe5-c5 # 
                    3.Qg5-c5 + 
                        3...Kd6-e6 
                            4.Qc5-e5 # 
        1...b7-b6 
            2.Qg5-f4 zugzwang.
                2...b6-b5 
                    3.Qf4-g5 zugzwang.
                        3...Ke6-d6 
                            4.Qg5-e7 #"