1. Joined
    05 Jun '07
    Moves
    906
    05 Jun '07 02:061 edit
    In the rulebook, it shows that both players must make alternating moves. So my challenge is to create a position in which the player who has the move MUST make a move that leads to checkmate. I believe this is only possible for mates in 1, but I may be wrong. Here's an example (White to move):
  2. Stormwind City
    Joined
    24 Oct '06
    Moves
    927
    05 Jun '07 02:28
    Maybe I'm not seeing what you are saying, but white has only 1 legal move, and that move happens to be checkmate. The King cannot move anywhere. The pawn above the king (h7) cannot move, and the pawn beside the king (g6) can only checkmate the black king.
  3. In Christ
    Joined
    30 Apr '07
    Moves
    172
    05 Jun '07 02:293 edits
    I'll work on that. Meanwhile, how about a position in which there's only one move that doesn't lead to mate?

    From Hoyle Majestic Chess (White to move):

    Black



    White
  4. Joined
    05 Jun '07
    Moves
    906
    05 Jun '07 02:35
    Originally posted by typen
    Maybe I'm not seeing what you are saying, but white has only [b]1 legal move, and that move happens to be checkmate. The King cannot move anywhere. The pawn above the king (h7) cannot move, and the pawn beside the king (g6) can only checkmate the black king.[/b]
    What I'm saying is to create a position in which the only legal move(s) lead to checkmate. Therefore, a player MUST checkmate the other player in a position.
  5. In Christ
    Joined
    30 Apr '07
    Moves
    172
    05 Jun '07 02:464 edits
    Here's one I just made where Black is forced to mate in two:


    Black



    White

    EDIT: This one's flawed; still working.
  6. Standard memberSwissGambit
    Caninus Interruptus
    2014.05.01
    Joined
    11 Apr '07
    Moves
    92274
    05 Jun '07 03:03
    Originally posted by twilight2007
    In the rulebook, it shows that both players must make alternating moves. So my challenge is to create a position in which the player who has the move MUST make a move that leads to checkmate. I believe this is only possible for mates in 1, but I may be wrong. Here's an example (White to move):
    [fen]7k/7P/6PK/r7/8/8/8/8 b 50[/fen]
    I've seen an example where White has no choice but to give mate in six (!) moves. I can't remember the exact position, but it's something like this:


    A pacifist's #6
  7. In Christ
    Joined
    30 Apr '07
    Moves
    172
    05 Jun '07 04:033 edits
    Here we go:

    White to move, and White must mate within 4

    White



    Black
  8. In Christ
    Joined
    30 Apr '07
    Moves
    172
    05 Jun '07 04:34
    Even better:

    White to move and must mate in four moves:

    Black



    White
  9. Joined
    31 May '07
    Moves
    696
    05 Jun '07 06:471 edit
    I looked to increase the number of pathways. White to play MUST mate in either 1 or 2, and there are five different mates:

  10. Sigulda, Latvia
    Joined
    30 Aug '06
    Moves
    4048
    05 Jun '07 08:15
    Originally posted by Jirakon
    I'll work on that. Meanwhile, how about a position in which there's only one move that doesn't lead to mate?

    From Hoyle Majestic Chess (White to move):

    Black

    [fen]B5KR/1r5B/6R1/2b1p1p1/2P1k1P1/1p2P2p/1P2P2P/3N1N2[/fen]

    White
    1.Rc6 Rxh7
  11. Going where needed.
    Joined
    16 May '07
    Moves
    3366
    05 Jun '07 19:362 edits
    Originally posted by Jirakon
    I'll work on that. Meanwhile, how about a position in which there's only one move that doesn't lead to mate?

    From Hoyle Majestic Chess (White to move):

    Black

    [fen]B5KR/1r5B/6R1/2b1p1p1/2P1k1P1/1p2P2p/1P2P2P/3N1N2[/fen]

    White
  12. Standard memberSwissGambit
    Caninus Interruptus
    2014.05.01
    Joined
    11 Apr '07
    Moves
    92274
    05 Jun '07 19:441 edit
    Originally posted by EinsteinMind
    Re-read what he wrote.

    Edit: Looks like you just did. 😉
  13. Going where needed.
    Joined
    16 May '07
    Moves
    3366
    05 Jun '07 21:152 edits
    Originally posted by SwissGambit
    Re-read what he wrote.

    Edit: Looks like you just did. 😉
    sorry. I posted something then I saw you were defining it differently then I was looking to see how i could fulfill the boundaries you gave and I was about to suggest another move when I saw that It was wrong.

    I'll admit i'm crappy on these sorts of puzzles...

    maybe I should stay out of these.
  14. Sigulda, Latvia
    Joined
    30 Aug '06
    Moves
    4048
    06 Jun '07 10:22
    Originally posted by EinsteinMind
    sorry. I posted something then I saw you were defining it differently then I was looking to see how i could fulfill the boundaries you gave and I was about to suggest another move when I saw that It was wrong.

    I'll admit i'm crappy on these sorts of puzzles...

    maybe I should stay out of these.
    No, if you're crappy at them, then you have to do them even more, to gain some skill. Solving puzzles develops your tactical vision, thus helps you on your playing.
  15. Joined
    25 Aug '06
    Moves
    0
    06 Jun '07 11:021 edit
    http://www.xs4all.nl/~timkr/chess2/diary_14.htm
    Item 267

    http://www.xs4all.nl/~timkr/chess2/diary_7.htm
    Item 130
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