Author is J. Gobiņš, Latvia, 1-st Latvian Championship, 1977 ,
There was printed later.
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Author is V. Studentsov :6-th USSR championship in draights composition, 1987 (3,5 points)
There was printed later :
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The combinational mechanism coincides with the " problem " of I. Bugaev, "Dhashki",- 7-1971 , d.No.1249

Repeat of what has been covered
Moderator: FOMIN
