Board Thread:Questions and Answers/@comment-145.228.74.30-20140109153529/@comment-180.191.133.85-20150101121644

Blueeighthnote wrote: Theoretically, a nine can be matched this way:

OOXXOXXOO

XXOOXOOXX

OOOOZOOOO

OOZZOZZOO

Never encountered such situation yet. My best was a match-7...... WHat does the z and x mean?