Only Chess Forum

Only Chess Forum

5-piece mate

Standard memberpatrickrutgers
Only Chess 16 Sep '12 20:29
  1. Subscribergreenpawn34
    e4
    Joined
    06 May '08
    Moves
    42492
    18 Sep '12 23:40
    (honestly boys posting a fen is pretty easy.) 😉


    Perfect. A six piece mate.
    (sounds a lot better than a 4 piece and two pawn mate.)

    I knew one of the lads would come up with something like this.
    You have never let me down in the past. Excellent.
  2. S
    Standard memberSwissGambit
    Caninus Interruptus
    2014.05.01
    Joined
    11 Apr '07
    Moves
    92274
    19 Sep '12 00:41

    This post is unavailable.

    Please refer to our posting guidelines.

  3. Standard memberRJHinds
    The Near Genius
    Fort Gordon
    Joined
    24 Jan '11
    Moves
    13644
    19 Sep '12 00:48
    Originally posted by SwissGambit
    Forget about the OP position for a bit. In your position, is Bc6 involved in the mate?
    I answered that question already. 😏
  4. Standard memberpatrickrutgers
    Pale Yellow Star!
    Minneapolis
    Joined
    29 Sep '08
    Moves
    38345
    19 Sep '12 01:11
    Originally posted by SwissGambit

    Pawns:
    [fen]8/8/8/2P1kPP1/4PP2/3PP3/8/7K w - - 0 1[/fen]
    Wow! A zero piece mate!
  5. S
    Standard memberSwissGambit
    Caninus Interruptus
    2014.05.01
    Joined
    11 Apr '07
    Moves
    92274
    19 Sep '12 01:13
    I have a game that's a 7-piece mate if we allow redundancies, but really a 5-piece mate if we omit the needless wQ and Ph2 or f2.

    Game 7507220


    A nice 5-er [not counting Pf7]

    Game 7415663
  6. Standard memberRJHinds
    The Near Genius
    Fort Gordon
    Joined
    24 Jan '11
    Moves
    13644
    19 Sep '12 01:15
    Originally posted by patrickrutgers
    Wow! A zero piece mate!
    I think you got it now, matey. 😀
  7. Standard membertvochess
    Joined
    08 Apr '09
    Moves
    19524
    19 Sep '12 08:33
    Hey SG,

    i was looking for mates with one single piece-type, but with as many essential pieces as possible. Your rook set-up is good, but I think the queen set-up could be like a bishop set-up with maximum 5 essential pieces.



    I'm not sure the position can be reached legally..

    Your pawn set-up made me realize that an essential 9-piece (well yeah: pawn) checkmate positions is possible.



    None of these pawns can be removed! It's obviously an illegal position by the way, because there are only 8 white pawns in a regular game.
  8. FL
    Standard memberFat Lady
    Joined
    21 Feb '06
    Moves
    6830
    19 Sep '12 10:20
    I suppose tvochess's eight knights could be modified slightly to make it eight knights and a pawn, with each square around the king (and the square the king stands on) attacked only once:
  9. Standard membertvochess
    Joined
    08 Apr '09
    Moves
    19524
    19 Sep '12 10:39
    That is another one: all essential 9-piece mates have a pawn checking the king.

    I initially forgot the pawn, but afterwards I realized it's the only piece that can check the king without attacking any of the squares surrounding the king. Chess is beautiful.
  10. Standard memberBebop5
    Milwaukee, WI
    Joined
    11 Dec '10
    Moves
    16731
    19 Sep '12 13:01
    How about this one? 5-piece mate and in under 20 moves.Game 9470625
  11. S
    Standard memberSwissGambit
    Caninus Interruptus
    2014.05.01
    Joined
    11 Apr '07
    Moves
    92274
    19 Sep '12 13:55
    Originally posted by tvochess
    Hey SG,

    i was looking for mates with one single piece-type, but with as many essential pieces as possible. Your rook set-up is good, but I think the queen set-up could be like a bishop set-up with maximum 5 essential pieces.

    [fen] 8/1k6/8/8/8/5B1B/7B/5BB1 [/fen]

    I'm not sure the position can be reached legally..

    Your pawn set-up made me realize ...[text shortened]... iously an illegal position by the way, because there are only 8 white pawns in a regular game.

    This position is legal - white's last move was Bd1-f3# or some such. Before that, bK wandered along the long diagonal while the other Bishops took their places.

    In your 2nd diagram, we can replace a pawn with a King to make it legal.
  12. Standard membertvochess
    Joined
    08 Apr '09
    Moves
    19524
    19 Sep '12 14:21
    Originally posted by SwissGambit
    [fen] 8/1k6/8/8/8/5B1B/7B/K4BB1 [/fen]
    This position is legal - white's last move was Bd1-f3# or some such. Before that, bK wandered along the long diagonal while the other Bishops took their places.

    In your 2nd diagram, we can replace a pawn with a King to make it legal.
    [fen]8/2K5/8/4kPP1/2P2PP1/2P2PP1/8/8 b - - 0 1[/fen]
    Hey SG,

    adding the king helps, but there is another problem: the mating pawn move couldn't have occured, because the square it came from is occupied by another pawn. So at least the f4-pawn has to be replaced by a d4-pawn. Then, the last move was d3-d4# (or d2-d4# ).



    Number of legal essential 9-piece checkmate patterns with only king and pawns (relative to defending king square) = 4*1*2*2 = 16

    Starting from the original 9-pawn mate set-up:
    - the king should replace 1 of the 4 pawns covering the corner squares. Replacing other pawns makes other pawns redundant or is illegal. So the king could be on c7, g7, c3 or g3.
    - the c and g pawns (or replaced by a king) are fixed. These cover d and f files, which if covered with e-pawns would lead to redundancy.
    - there are 2 possibilities for the mating pawn (covering e5), i.e. d4 and f4 --> this dictates the position of the pawn covering e4 (so 2 combinations d4+f3 and d3+f4)
    - there are 2 independent possibilites for the pawn covering e6 (d5+f5)

    I'm just wasting time.
  13. FL
    Standard memberFat Lady
    Joined
    21 Feb '06
    Moves
    6830
    19 Sep '12 14:40
    Originally posted by tvochess
    ... but there is another problem: the mating pawn move couldn't have occured, because the square it came from is occupied by another pawn.
    Invert BoardPGNHeadersComments
  14. S
    Standard memberSwissGambit
    Caninus Interruptus
    2014.05.01
    Joined
    11 Apr '07
    Moves
    92274
    19 Sep '12 14:53
    Originally posted by tvochess
    Hey SG,

    adding the king helps, but there is another problem: the mating pawn move couldn't have occured, because the square it came from is occupied by another pawn.
    It came from e3, as Fat Lady just pointed out. 🙂
  15. Standard membertvochess
    Joined
    08 Apr '09
    Moves
    19524
    19 Sep '12 15:10
    Of course! I always forget these capturing moves in backward problems.
Back to Top
Sign up or Connect to Play Chess

Cookies help us deliver our Services. By using our Services or clicking I agree, you agree to our use of cookies. Learn More.I Agree