I suspect the 'down-thumbers' are those who could not solve it.
Howell v Gormally contained a very difficult missed win that featured
checks and pawn promotions for the losing side and non-checking
quite pawn moves for the side that could have won.
Toss in time trouble and you have the makings of a missed brilliancy.
David Howell -Daniel Gormally, British Championships 2015