Saturday August 20, in the very small Spanish village of Hinojosa, in Molina-Alto Tajo district, the Siberia of Spain. In August it'll be a bit warmer than that suggests - and the kick-off's at high noon.
The organiser, one Carlos Faustino Malo, assures us that chess is played in the village bar, and that fifteen hundred spectators are expected: this may, one suspect, have less to do with the spectacle itself than with the gigantic free meal to be laid on for all the visitors.
It's a publicity stunt, basically, to try and raise the profile of the area, one of the most depopulated in Europe, and one not atypical of much of Spain in that many or most of those who still live there are old and retired. (I've travelled through the region several times and it is startling how few people there are, especially if you grew up in the South-East of England.)
According to Público's Strambotic column, it's the second event of its kind - the first having been held in 2012.
There's a normal chess tournament on the day before, and two finalists come back the next day, play on a normal board but have their moves transmitted to two quad-bike riders who, says the story, have the job of moving the thirty tractors and two combine harvesters (representing the kings) on what they claim to be the biggest chessboard in the world.
No, I don't know what happens in time trouble.
[Chessboard image: Público]