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third row eighth column is 7
...because it can either be 6 or 7, if it's 6 then r3c3 is 5, r3c6 is 8, r3c4 is 1, r1c4 is 4, r1 c8 is 9 which leaves no possibility for r7c8 (6 or 9)
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The most difficult thing is the decision to act, the rest is merely tenacity Amelia Earhart
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