zero game
Sign in to savegame where both players can't move
In the Vinony graph
Vinony's link graph records 12 inbound references to zero game, and connects out to Sprague–Grundy theorem, John Horton Conway and zero-sum game.
It is catalogued under topics including 0 (number) and Combinatorial game theory.
Vinony links it to 5 Wikipedia language editions.