[inkhrprb] Defining the start of the endgame

Let Queen count as 2 points and rook as 1.  The chess endgame has begun when both players have 2 or fewer points.

This does mean that a queen trade in the opening has gone directly to the endgame, for example the "Berlin endgame" of Ruy Lopez.  Castling and king safety is less of a priority; the king has become an attacking piece. This also means KQR versus anything is not yet an endgame, which probably goes against conventional notions.

Inspiration was an idea: adjournment becomes available when the endgame begins, and players can carefully study the position, improving the quality of endgame play.  Less radically, a new time control at the start of endgame.

Maybe both bishops together count as 1 point.