4 ms·

Tim Krabbés blog is recommended for this type of question and in general: https://timkr.home.xs4all.nl/chess2/minor.htm https://timkr.home.xs4all.nl/chess2/mino

• zzo38computer 11mo ago
  I had known of stalemate (both causing and preventing it), but there are others as they mention there. One other I think I have read about (I do not entirely remember) is that someone promoted to rook because promotion to queen would have taken more time due to not having a extra queen to promote to so they would have to go to another table to borrow it (or ask the tournament officials for it).
  • adzm 11mo ago
    Are upside down rooks not allowed to substitute as queens?
    • deleted 11mo ago
      [deleted]
    • zzo38computer 11mo ago
      As far as I know, it doesn't count. But, I looked it up. Apparently, it is allowed in USCF but not FIDE.
• beyondCritics 11mo ago
  There is also nice discussion of the beautiful and practically relevant "Saavedra position", which does have an under promotion to a rook. https://timkr.home.xs4all.nl/chess/saavedra.htm https://timkr.home.xs4all.nl/chess/saavedra.htm