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MatPlus.Net  Forum Competitions Jean Haymann 90 Jubilee Tourney |
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| | | (1) Posted by Paz Einat [Thursday, Jan 20, 2022 13:27] | Jean Haymann 90 Jubilee Tourney
The Israel Chess Composition Society is happy to announce a theme tourney celebrating the 90th birthday of Jean Haymann. The theme involved Jean’s favorite motives.
Please send entries to the tourney director. Deadline: July 31, 2022
Theme: the solutions of a helpmate in two moves must include at least two of the following sibling motives (one motive per solution): Goethard, inversed Goethard, anti Goethard, Gamage.
Tourney director: Omer Friedland omrfree@gmail.com
Judge: Ricardo de Matos Vieira
Definitions of those motives, based on H#2, for the need of this tourney and not authoritative:
GOETHARD: the mating move unpins a disturbing black unit which must therefore be obstructed at W1 or B1,B2.
INVERSED GOETHARD: a black unit, indirectly unpinned at W1 or B1,B2, must be obstructed at W1 or B1,B2. Mate must be given by a battery.
ANTI GOETHARD: a pinned black unit stands initially obstructed by W or by black. Solving moves clear it`s line, thus avoiding a dual battery mate which would unpin it.
GAMAGE: a black unit pinned by WQ must be obstructed since the pinning WQ will move away at W2 to give mate.
Announcement with examples here: http://www.variantim.org/Haymann90JT.pdf
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MatPlus.Net Forum Competitions Jean Haymann 90 Jubilee Tourney |
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