1. SubscriberBigDoggProblem
    The Advanced Mind
    bigdogghouse.com/RHP
    Joined
    26 Nov '04
    Moves
    110786
    20 Sep '18 17:31
    The server should automatically rule the game a draw when the only material on the board is:

    1. King versus King
    2. King and Knight versus King
    3. King and Bishop versus King

    ...as no mate is possible in any of them, no matter how badly one plays.
  2. Subscriberroma45
    st johnstone
    Joined
    14 Nov '09
    Moves
    341727
    20 Sep '18 19:59
    Originally posted by @bigdoggproblem
    The server should automatically rule the game a draw when the only material on the board is:

    1. King versus King
    2. King and Knight versus King
    3. King and Bishop versus King

    ...as no mate is possible in any of them, no matter how badly one plays.
    Still can win by timeout.
    Not allowed on over the board games but can happen on here.
    I agree though should be auto.
  3. Joined
    18 Jan '07
    Moves
    6792
    21 Sep '18 14:32
    Originally posted by @bigdoggproblem
    The server should automatically rule the game a draw when the only material on the board is:

    1. King versus King
    2. King and Knight versus King
    3. King and Bishop versus King

    ...as no mate is possible in any of them, no matter how badly one plays.
    Also K+B vs K+B of the same colour. In all other piece-vs-pieve situations both players can mate a sufficiently stupid opponent, but not in that one.
  4. Joined
    10 Jan '08
    Moves
    10220
    21 Sep '18 18:29
    Originally posted by @bigdoggproblem
    The server should automatically rule the game a draw when the only material on the board is:

    1. King versus King
    2. King and Knight versus King
    3. King and Bishop versus King

    ...as no mate is possible in any of them, no matter how badly one plays.
    If stalemate is still possible then no.
  5. Subscriberroma45
    st johnstone
    Joined
    14 Nov '09
    Moves
    341727
    21 Sep '18 20:18
    Originally posted by @trev33
    If stalemate is still possible then no.
    Stalemate is a draw trev....
    Faster and better if its done auto...
  6. Subscribermoonbus
    Uber-Nerd
    Joined
    31 May '12
    Moves
    1981
    21 Sep '18 21:49
    Originally posted by @shallow-blue
    Also K+B vs K+B of the same colour. In all other piece-vs-pieve [sic] situations both players can mate a sufficiently stupid opponent, but not in that one.
    Hey Blue, I've had a few piece-vs-peeve situations myself.

    PS I'm in favour of auto-draw when insufficient material to mate remains on the board.
  7. Joined
    10 Jan '08
    Moves
    10220
    21 Sep '18 21:54
    Originally posted by @roma45
    Stalemate is a draw trev....
    Faster and better if its done auto...
    Oh yeah... carry on 😆
  8. Joined
    18 Jan '07
    Moves
    6792
    24 Sep '18 09:161 edit
    Originally posted by @moonbus
    Hey Blue, I've had a few piece-vs-peeve situations myself.

    PS I'm in favour of auto-draw when insufficient material to mate remains on the board.
    Well, that's my point.

    If either side has a rook, queein or pawn, then that side can mate. Not necessarily force mate against whatever the opponent still has, but nevertheless you can stumble into mate. None of those cases are, therefore, an auto-draw.

    We're left with only minor pieces.

    It is well-known that two bishops and bishop+knight can (painfully) force mate against a lone king, but any two minor pieces can get mate against a blunderer. Not an auto-draw.

    We're left with at most one minor piece each.

    One minor piece vs. lone king and LK vs. LK can obviously not mate, so they're auto-draws.

    Dubious cases left: minor piece vs. minor piece. With N vs. N or N vs. B it is possible to construct a corner mate. Again you have to be an idiot to get mated that way, but it's always possible. No auto-mate.

    But now bishop against bishop. You have to get mated in a corner of the opponent's bishop. The king can block two escape squares. The third must be occupied by your own bishop. This is only possible if you have unequal bishops. A same-coloured bishop can only block the mate, not aid it.

    Therefore: two lone kings, lone king versus king plus one minor piece, and king plus bishop versus king plus same-coloured bishop should be automatic draws. Nothing else is.

    (Except for things like blockades, but those are nearly impossible to detect automatically.)
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