Задача 630: Mark Basisty, Andriy Frolkin & Anatoly Vasylenko - Twomover |
(29.11.2015) Добре дошли на Андрей Фролкин и Марк Басист от Украйна! Заедно с техният съгражданин Анатоли Василенко те представят интересна двуходовка с ретроградно съдържание - може ли белите да рокират!?
630. Mark Basisty, Andriy Frolkin & Anatoly Vasylenko (Ukraine)
29.11.2015
#2 vvv (14+8)
1.Rg1? [2.Qf6# A], 1...B:g4 2.Rf1# B (Nietvelt)
1...Bg2 2.Se2# C, 1...g5 2.Qg3#, 1...Be5!
1.Rf1? B [2.Se2# C], 1...h:g4 2.Qf6# A, 1...e:d3 2.S1:d3#, 1...Ra1!
1.O-O? [2.Se2#], 1...h:g4 2.Qf6#, 1...e:d3 2.S1:d3#, illegal!
1.R:f3+?, 1...e:f3 2.S1d3#, 1...K:f3 2.O-O#?? illegal!!
1.e7! [2.Se6#], 1...e3 2.d:e3# ,1...h:g4 2.Qf6#, 1...e:d3 2.S1:d3#,
1...B:g4 2.Rf1 # (2.O-O#??? – illegal!!!)
Pseudo Le Grand, Nietvelt.
Retroanalysis-based refutation of white moves performing different functions:
(First move in a try; Mating move; Dual being avoided)! (Authors)
White can castle only if the king has not moved. If so, the black rook reached a2 ony by promoting on a1 which requires promotion by white whereas no white pawn is missing! (Seetharaman) |
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САЙТ ЗА ШАХМАТНА КОМПОЗИЦИЯ
Главен редактор:
Диян Костадинов
Помощник редактор:
Seetharaman Kalyan