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Circle SneK - a new fairy condition

chesspieces1(01.12.2014) This new fairy condition is a similar variation of SneK Chess - condition which was presented during the WCCC in Bern 2014 as a theme of the Bulgarian Wine Tourney. I believe Circle SneK is with interesting possibilities and it is now included in the solving program WinChloe (version 3.31 which is now available - many thanks to Christian Poisson!). You can see here the definition and examples. 



Circle SneK


The condition is named as a Circle SneK because the transformations are similar like in SneK Chess, but here all possible piece transformations are as a closed circle - Knight-Bishop-Rook-Queen-Knight... (pawns are excluded).



When a Queen is captured - a Rook (or Royal Rook) of the same color (if exists on the board) becoming Queen;

When a Rook is captured – a Bishop (or Royal Bishop) of the same color (if exists on the board) becoming Rook;

When a Bishop is captured - a Knight (or Royal Knight) of the same color (if exists on the board) becoming Bishop;

When a Knight is captured – a Queen (or Royal Queen) of the same color (if exist on the board) becoming Knight.

Only one piece may change its type after a capture. In case of option – the capturing side choose which piece will be transformed.

The capture and the change of type is a single move. If this full move result a selfcheck - the capture is forbidden. 

The capture of a pawn is normal. The capture is normal also in the case when there is no piece on the board which should be transformed. Castling with Royal piece is not allowed. 





2nd KoBulChess.com Thematic Tourney - Christmas Tourney 2014 

Theme: All type problems (#/=, H#/H=, S#/S=, HS#/HS= etc.) in 2-4 moves with the fairy condition Circle SneK. Other fairy pieces and conditions are not allowed. Royal pieces can be used of course.

Closing date: 20.12.2014

Judge: IM Krassimir Gandev

The award will be published till to the end of 2014 in the website KoBulChess.com

Please send your problems by email to: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

The judge will receive all entries in anonimous diagrams and uniform solutions.




0 #1 Diyan Kostadinov 2014-12-02 21:21
I received some messages from composers where they ask me why I named this version of SneK Chess as Circe SneK. No, it is not Circe, it is Circle. Because all pieces transforms itself in a complete circled way. So I decided to name it Circle SneK.
(Another option was Cycle SneK).
+2 #2 Kjell Widlert 2014-12-03 21:40
Circle Snek is a wonderful name, it makes the rules immediately obvious.
0 #3 Diyan Kostadinov 2015-01-09 22:45
Here you can see more examples of the condition:

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