Geodesic
Pandiagonal sudokus
The electronic journal of combinatorics, Tome 19 (2012) no. 1
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It is shown that a pandiagonal $n^2\times n^2$-Sudoku exists if and only if $n \equiv \pm 1~($mod$~6)$. Also for these $n$ the existence of row-cyclic, pandiagonal $n^2\times n^2$-Sudokus is conjectured and confirmed for $n=5$ and $n=7$.
DOI : 10.37236/1169
Classification : 05B15 
@article{10_37236_1169,
     author = {Walter Klotz and Torsten Sander},
     title = {Pandiagonal sudokus},
     journal = {The electronic journal of combinatorics},
     year = {2012},
     volume = {19},
     number = {1},
     doi = {10.37236/1169},
     zbl = {1244.05043},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1169/}
}
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Walter Klotz; Torsten Sander. Pandiagonal sudokus. The electronic journal of combinatorics, Tome 19 (2012) no. 1. doi: 10.37236/1169

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