Don Knuth's current work in progress is: "The Art of Computer Programming Volume 4 Fascicle 7" with publication expected in 2024.
See the oft-changing draft at: https://cs.stanford.edu/~knuth/fasc7a.ps.gz Roger Hui's essay https://code.jsoftware.com/wiki/Essays/Queens_and_Knights is referenced in exercise 508 and answer (pages 118 and 202 in the draft). ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
