The Chinese chess prodigy Wei Yi wins the hearts of fans with every new tournament he plays. It is not just his phenomenal results (with his current rating, he should be the highest-rated 16-year-old ever!), but also his sparkling style of play th... | Read More
After a brief summer break, Chess.com's Death Match returns less than three days from now with a battle between two gold medal winners.
GM Wang Yue (China, FIDE 2713) will take on GM Aleksandr Lenderman (USA, FIDE 2584) in D... | Read More
If you’re reading this article, you’re probably well-informed on chess in general.
So you already know that Chess.com offers an extensive library of chess news, articles, videos, openings information, training tools, and lessons... | Read More
This week I will be reviewing an interesting and unusual book about the development of chess in China. The author, Liu Wenzhe, is considered to be one of the first promoters of western chess in China. Originally a XiangQi (Chinese chess) player, W... | Read More
Probabilistic Rating Theory
A = ½ ( Ao + Bo + R )
B = ½ ( Ao + Bo – R )
P = 1 / (1 + e ^ ( –KR ) )
R = (log ( (e ^ ( KRo( Ro> 0 ) ) + S ) / ( e ^ ( –KRo( Ro< 0 ) ) + 1 – S ) ) ) / K
K = –( log ( 1 / Ps ... | Read More