United Reformed Church Hall, Tetherdown, London N10 1ND ?

From the south end of Tetherdown the Church Hall is the second building on the left. The entrance to the chess club is on the north side of the building, off Tetherdown - to the west.

Muswell Hill start play at 7.15 - 2 1/2 hours

From http://www.streetmap.co.uk/ by using the postcode. Note: the arrow is too far north.