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• Empty Rectangle
  ...the term '''Empty Rectangle''', but to a smaller audience. The acronym '''ER''' is used by many players. ...low. Here the double ER consists of the 9 conjugate pair in row 1 and the ER boxes 4 and 5. If r1c2=9 then r5c3 must also be 9 and if r1c5=9 then r5c6
  7 KB (851 words) - 03:34, 4 June 2020
• 2-String Kite
  ...ore r7c579 cannot be X. This extended technique can also be used with the ER technique. This is an also an example of multicoloring with 3 color chains
  5 KB (796 words) - 03:39, 4 June 2020
• Terminology
  ; [[ER]]
  19 KB (2,734 words) - 02:19, 19 December 2022