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A chess question of W.T. Tutte has been closed for at least 5 years. The only argument given for its closure at the time was that a moderator saw it as a question of chess strategy. I think the first phrasing was not clear. Most of the answers (including the green-ticked one) are indeed "chess answers". However, it is not a question of chess ...

Status: [REOPENED] Thank you! Request to reopen How to obtain the rational solution of a linear system efficiently?. In light of recent discussions about being more welcoming to good faith questions from less experienced users, I believe this is an example of a question that was too quickly closed and not given due consideration. I had previously voted to ...