Scrabble rotating mechanisms and personalized graphics. An edition has been released (in association with the RNIB) with larger board and letters for players with impaired vision. The colours on the board are more contrasting and the font size is increased from 16 to 24 point. The tiles are in bold 48 point. An introduction to tournament "Scrabble" and its players can be found in the book "Word Freak" by Stefan Fatsis. In the process of writing, Fatsis himself progressed into a high-rated tournament player. The "Scrabble Player's Handbook", edited by Stewart Holden and written by an international group of tournament players,
Square-free word "G" has a "k"-coloring for which the sequence of colors along every simple path is squarefree. The Kolakoski sequence is an example of a cube-free sequence. An abelian "p"-th power is a subsequence of the form formula_6 where each formula_4 is a permutation of formula_1. There is no abelian-square-free infinite word over an alphabet of size three: indeed, every word of length eight over such an alphabet contains an abelian square. There is an infinite abelian-square-free word over an alphabet of size five. Square-free word In combinatorics, a square-free word is a word (a sequence of characters) that does not