John Beasley published this on his website and asked ARVES to republish it.
Cyclic zugzwangs (John as reporter, July 2023)
A cyclic zugzwang is a position from which the side to move can win,
but in at least one line only by returning to the same position with the other side to move.
Shortly before his death in May 2021, Guy Haworth told me that a team consisting of Galen Huntington, Árpád Rusz, and himself
had been investigating the occurrence of cyclic zugzwangs in positions with small numbers of men,
and had found that there were 3 with four men and 1,132 with five.
A paper describing their results was ready for publication, but the journal to which it was intended to be sent required it to be submitted in a different format,
and following Guy's death it was not found practical to do this. We have therefore offered to post it here.
Please note that the authors reserve all rights in this matter (contact
Below you may find the PDF to look at and the PGN free to download and a few examples of this collection and a description of the PGN file !
Examples from the PGN file:
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