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Problem 329: Janos Mikitovics - fairy (Swapping Kings, Anti Einstein Chess, Locust)

mikitovics(31.01.2014) Help-selfmate with dedication and good contrast twin by Janos Mikitovics from Hungary.


    Swapping Kings: When the side on-move checks the opposite King, the Kings change places. This is known as the “swap”. A swap is mandatory. The legality of any checking move is evaluated after the swap, except in certain cases involving castling. Castling out-of–check is illegal (wKe1 wRh1 bKe8 bBa5, 1.0-0??). Castling through check is illegal (wKe1 wRh1 bKf8 bBa5, 1.0-0??). Castling into-check is legal (WKe1 WRh1 BKf8 BBa7, 1.0-0!) A King swapped back to its game-array square is considered “reborn” and is eligible to castle.

    Anti Einstein chess: every time a piece moves (without capturing), it "loses energy" and transforms itself ("is demoted") into a smaller unit, one step down the ladder from Queen to Rook to Bishop to Knight to Pawn. Kings do not transform. A non-capturing Pawn-move does not lead to any transformation. You can also have pawns on the 1st-rank (after a non-capturing Knight move): these pawns can make a single, double or triple step forward. After a double or triple step, they can be captured en-passant by an enemy pawn on the 3rd or 4th rank. After a triple step, en-passant capture can take place on two different squares!

    Locust: a piece which moves only to capture. It lands on the same squares as a grasshopper, but the arrival square must be empty, because the locust captures its hurdle.



0 #1 Diyan Kostadinov 2014-01-30 22:18
According the definition of Einstein chess the promotions are not allowed, but here we see promotion of Locust. Is the rule do not exist for promotion of fairy piece?
0 #2 Janos Mikitovics 2014-01-30 22:35
Diyan, please see my sent pdf:
the condition(s) of twin b)
Swapping Kings + Anti-Einstein Chess.
See also the solution b).
0 #3 Diyan Kostadinov 2014-01-31 11:56
Sorry Janos. It was look to me as Einstein. I will change it when I come back at home tonight.
I saw that Popeye do not solve Einstein with fairy pieces on the board, but solve Anti-Einstein. WinChloe solve Einstein with fairy pieces, but when a Pawn moves without capturing it become that kind fairy piece.
0 #4 Janos Mikitovics 2014-01-31 14:40
Ok Diyan, thanks!
It seems, the condition may not be Einstein, because the fairy pieces may not be reborn/captures. If the cond. is Anti Einstein, the pieces (orthodox and fairies) doesn't change when it captures. I think, the WinChloe is here faulty...!?
0 #5 SKB 2014-02-06 15:27
Dear Janos,
Thank you very much for your kind dedication.

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