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"Мемориальный конкурс Данка Петкова -100"

26 Июня 2020 DANKA PETKOVA – 100 M.T. 2020

On the occasion of the 100th anniversary of the birth of Danka Petkova (1920-1993), mother and first chess teacher of the Bulgarian composer Petko Petkov, the grandmaster organises an International thematic tournament “Danka Petkova 100 M.T. 2020”.
The tournament will be held in three sections:
a) Direct mates in 2-4 moves.
b) Helpmates (stalemates, double ==) in 2-4 moves with at least two phases
(2 or more solutions, set play and solution, twins but no zeropositions.).
c) HS# (=, ==) in 2-4 moves with at least two phases.
The theme in each section is free , but with the obligatory use of at least one of the new Bul (Bulgarian) fairy pieces invented by Petko Petkov: Bul Grasshopper, Bul Lion, Bul PAO, Bul VAO. The colour of these 4 pieces can be white, black, neutral or semi-neutral. Also allowed are Royal pieces of Bul type. The usual kinds of G,LI, PAO and VAO are not allowed. No other fairy pieces or fairy conditions are allowed.
In short: the units in this T.T. can only be orthodox plus the four types of quoted Bul pieces (with any colour and even with royal status). It is possible to check such problems with the new version of WinChloe 3,50.
Originals, in unlimited number, must be sent to the organiser GM Petko Petkov: ppetkov2702@gmail.com no later than November 15th, 2020. The results will be published by the end of 2020. Prizes: books by Petko Petkov.
Please see the tournament examples at the following link: https://drive.google.com/file/d/14oPSQ_ABATRuuyFqw3_y-QZUmxt2sKjB/view?usp=sharing
I express my heartfelt thanks to Christian Poisson, who programmed these pieces in WinChloe 3.50, and to Geoff Foster, who perfectly edited and formatted the text and diagrams.