• Ekkonic
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    HINTS: r3/c3, r3/11, r11/c11
    After that it should be logical. Just repeat the pattern.
    August 22, 2016, 7:50 pm
  • Strigoii
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    Thank you for the hint, Ekkonic. The pattern is beautiful despite the ambiguous squares.
    February 7, 2020, 8:57 pm