Cresta (Mass.), 2006. Highest single play (SOWPODS) – CAZIQUES 392 by Karl Khoshnaw. Highest average score, multi-day tournament (OSPD) – 503 by James Leong (Sask.) over 12 rounds at Brandon, Man., 2015. 484 by Doug Brockmeier (Calif.) over 12 rounds at Elmhurst, Ill., 2011. 471 by Chris Cree (Tex.) over 18 rounds at the Bayou Bash in Houston, Tex., 2007. Highest average score, multi-day tournament (SOWPODS) – 499.94 by Nigel Richards (MY) over 16 rounds at the 7th Lim Boon Heng Cup, Singapore, 2009. Highest average score, one day tournament (SOWPODS) – 548 by Jackson Smylie of Toronto, Ontario over 5 rounds at Caledon, Ontario Highest average score, one day tournament (OTCWL) – 532 by Jackson Smylie over 4 rounds at North American Scrabble Championship early bird in Las Vegas Two other records are believed to have been achieved under a British format known as the "high score rule", in which a player's tournament result is determined only by the player's own scores, and not by the differentials between that player's scores and the opponents'. Play in this system "encourages elaborate setups often independently mined by the two players", and is significantly different from the standard game in which defensive considerations play a major role. While the "high score" rule has led to impressively high records, it is currently out of favor. High game score of 1,049 by Phil Appleby of Lymington, Hampshire, UK, on June 25, 1989, in Wormley, Hertfordshire, UK. His opponent scored just 253 points, giving Appleby a record victory margin of 796 points. High single-turn score of 392, by Dr Saladin Karl Khoshnaw in Manchester, UK, in April 1982. The word he used was CAZIQUES, meaning "native chiefs of West Indian aborigines". Hypothetical scores in possible and legal but highly unlikely plays and games are far higher, primarily through the use of words that cover three triple-word-score squares. The highest reported score for a single play is 1780 (OSPD) and 1785 (SOWPODS) using oxyphenbutazone. When only adding the word sesquioxidizing to these official lists, one could theoretically score 2015 (OSPD) and 2044 (SOWPODS) points in a single move. The highest reported combined score for a theoretical game based on SOWPODS is 4046 points, constructed by Nathan Hedt of Australia. Other records are available for viewing at Total Scrabble, an unofficial record book that includes the above as sources and expands on other topics. In August 1984,