Orthogonal Latin Square 6*6 I need to make remarks about Tarry's Proof for the nonexistence of 6x6 Latin Squares as part of my final exam for a class I'm in. Problem is, I can't find it ANYWHERE on the internet. I can only find minor comments about it that don't explain what he did. Does anyone know where I can find it online? Or does anyone know where I can find a detailed explanation of his proof? if you have other proof for this question please share that... i need to proof of this question

Since your after remarks, here's some.


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*It's easy enough these days to prove the non-existence on a computer.  There are only $12$ main classes to exclude (ref.).

*There's a short proof of this result:

Stinson, A short proof of the nonexistence of a pair of orthogonal latin squares of order six, J. Comb. Theory A, 36 (1984) 373-376



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*There's a recent graph theory proof of the non-existence of self-orthogonal Latin squares (Latin squares that are orthogonal to their transpose) of order $6$; see:



Burger, Kidd, and van Vuuren A graph-theoretic proof of the non-existence of self-orthogonal Latin squares of order 6, Disc. Math. (2011) 311, pp. 1223-1228.

PS. If you're desperately after the paper, I suggest you email either Brendan McKay and/or Ian Wanless.  They're the most likely people to have obscure papers on Latin squares.
