Fairy chess composition

# No.1630 (NSR)

Original Fairy problems
JF-2022-I:
01.01.2022 - 30.06.2022

Definitions / Определения

No. 1630 Shankar Ram
India
original - 11.07.2021

white Kc8 Bc6 EQb7 Pc2c4e6g2g4g5 black Ka8 Ba7 Sa3f8 Web2b4d2d4e7f2f4g7h2h4 Zc3g3 MAe3
#3                       9+17
Diagram Circe, Black must capture
Equileaper b7
Wazir b2,b4,d2,d4,e7,f2,f4,g7,h2,h4
Zebra c3,g3
Right Zebra e3

Solution: (click to show/hide)

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Joost de Heer
July 12, 2021 08:25

The definition given is that of an equihopper, not an equileaper.
Equileaper
Combination of all possible (m,n) leapers where m and n are both even. This piece can leap to any square that is a multiple of 2 squares distant both vertically and horizontally.

Last edited 3 years ago by Joost de Heer
Seetharaman
July 13, 2021 03:33

You are right Joost unfortunately the same definition is given in Strategem also 🤔

Last edited 3 years ago by Seetharaman
Joost de Heer
August 19, 2021 10:57

Quick question: can an equileaper make a nullmove? The definition doesn’t prohibit it.

shankar ram
August 19, 2021 15:44

No. It wasn’t my intention and It hasn’t been programmed like that in WinChloe too. The definition “all combinations of x and y where x and y are both even” seems to suggest it can make a null move. “x,y >0” should perhaps be added! My original definition was it moves/captures like a non-stop Equihopper with or without a hurdle.

Last edited 3 years ago by shankar ram
Joost de Heer
August 19, 2021 16:02

Probably x+y>0 (x=0 and y>0 or vice versa is allowed).

Seetharaman
July 17, 2021 14:26

Joost has given the right definition of Equileaper. Another way to describe it is Equileaper can visit/attack every square an Equi-hopper can. No hurdles needed !

Last edited 3 years ago by Seetharaman
Joost de Heer
August 5, 2021 10:14

: Can you fix the Equileaper definition?

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