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| (1) Posted by Andrew Buchanan [Tuesday, Jan 7, 2025 05:54] |
Adding a fairy piece to PDB
Hi, on behalf of a friend I would like to add a piece called a square rose to PDB catalogue.
Like a rose, it takes 8 leaps to execute a circuit, but it's a square with 2 leaps a side rather than an octagon with 1 leap a side.
When I look at rose in PDB fairy pieces, the critical column is the final one labelled "Moves". For the rose, this is "R1:2[o]". How does this give us rose movement, and what should the corresponding incantation be for the square rose?
Thank you
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| (2) Posted by Joost de Heer [Tuesday, Jan 7, 2025 07:51] |
A square rose on e4 can move to which squares? e4-f4-g4-g5-g6-f6-e6-e5-e4 (and 3 other squares)? End only on the corners of the square or on the intermediate squares as well?
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| (3) Posted by shankar ram [Tuesday, Jan 7, 2025 08:31] |
I think Andrew means something like d1-f2-h3-g5-f7-d6-b5-c3-d1.
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| (4) Posted by Andrew Buchanan [Tuesday, Jan 7, 2025 10:05] |
Yes Shankar has got it exactly: its unit leap remains a knight. Hence the "1:2" in the moves code is probably something we want to keep. But what's the R and what's the [o]?
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| (5) Posted by Kenneth Solja [Tuesday, Jan 7, 2025 16:17] |
Should it be then Roseknight?
Kenneth
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| (6) Posted by Andrew Buchanan [Tuesday, Jan 7, 2025 23:20] |
Yes Kenneth: the term rose currently assumes we are dealing with a knight. Rose-like behaviour could be shown for any x:y-leaper where 0<x<y in which case the term rose would need to be adjusted to rose knight.
However this question is not about naming of fairy pieces but about the specification in PDB of rose and and how to adapt to square rose (knight).
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