1. Standard memberskeeter
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    19 Jun '05 05:101 edit
    ....and mate in two against any defence.

    Came across some very old chess literature which contained these classic mate in two puzzles.



    skeeter

    fen string edit
  2. SubscriberBigDoggProblem
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    19 Jun '05 05:282 edits
    Originally posted by skeeter
    ....and mate in two against any defence.

    Came across some very old chess literature which contained these classic mate in two puzzles.

    [fen]4K3/3Q4/8/p3k2N/r7/R2B4/5P2/7b w - - 0 1[/fen]

    skeeter

    fen string edit
    1.Be4!! (2.Qd5# )

    1...Bxe4 2.f4#
    1...Rxe4 2.Rxa5#
    1...Kxe4 2.Re3#
    1...Rd4 2.Qe7#

    Spiffy interference motif.

  3. Standard memberskeeter
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    19 Jun '05 05:31
    Originally posted by BigDoggProblem
    [b]1.Be4!! (2.Qd5# )

    1...Bxe4 2.f4#
    1...Rxe4 2.Rxa5#
    1...Kxe4 2.Re3#
    1...Rd4 2.Qe7#

    Spiffy interference motif.

    [/b]
    Too good BigDogg. Give me a minute and I'll post another.

    skeeter
  4. Standard memberskeeter
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    19 Jun '05 05:351 edit
    Same again - white to move and mate in two:




    skeeter

    another fen edit
  5. SubscriberBigDoggProblem
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    19 Jun '05 05:49
    Originally posted by skeeter
    Same again - white to move and mate in two:

    [fen]b4b2/3r4/3pr3/8/1K5N/2PR4/Q3p3/5kBR w - - 0 1[/fen]


    Skeeter
    1.Qa6 (2.Rd1# )

    Unfortunately for Black, all of his checks cut off Ba8's attack on Rh1, allowing the Rh1/Bg1 battery to fire.

    1...Rb7+ 2.Bb6#
    1...d5+ 2.Bc5#
    1...Re4+ 2.Bd4#

    And finally
    1...e1N/Q/R/B 2.Rf3#
    1...Ke1 2.Qa1#

    Tries: 1.Rd1+? exd1N! and 1.Qxa8? e1N!

  6. Standard memberskeeter
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    19 Jun '05 06:52
    Yep. Correct. Next one:



    skeeter
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    19 Jun '05 07:002 edits
    By the looks of it 1.Rcc7! (2.Nc3# )
    1...Ne2 2.Qxh5#; 1...Nb5 (1...Rxa4) 2.Rc5# ; 1...Bxb3 2.Bxb3#; 1...Nc6 2.Rcd7#;
    EDIT: missed this 1...Ne6 2.Rec7#; 1...Nf5 2.Re5 #
    EDIT2: EDIT2: missed this variants
    1...Nf3 2.Qe4 #; 1...Nc2 2.b4 #; 1...Nxb3 2.Qd3 #

  8. Standard memberskeeter
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    19 Jun '05 08:07
    Yes. All the knight moves vacating d4 after the key Rc-c7 leads to a different mate. They do get harder.

    skeeter
  9. Standard memberskeeter
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    19 Jun '05 08:14
    ....and yet another:



    The perfect zugzwang position ?

    skeeter
  10. Standard memberjfkjmh
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    19 Jun '05 09:10
    Originally posted by skeeter
    ....and yet another:

    [fen]8/qQ5p/3pN2K/3pp1R1/4k3/7N/1b1PP3/8[/fen]

    The perfect zugzwang position ?

    skeeter
    1.Nd4 threatens 2.Rf5#
    1. ...Kd4: Qb4#
    1. ...ed: 2. Qd5:#
    1. ...Qd4: 2.Qh7:
    1. ...Bd4: 2.Qb1#
    Sorry, couldn't find a Zugzwang here:'(
  11. Standard memberskeeter
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    19 Jun '05 09:192 edits
    Nope . Sorry. ..Qxd4. Rf5 is not mate.

    skeeter
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    19 Jun '05 11:46
    Originally posted by skeeter
    ....and yet another:

    [fen]8/qQ5p/3pN2K/3pp1R1/4k3/7N/1b1PP3/8[/fen]

    The perfect zugzwang position ?

    skeeter
    Very nice!

    When black is on the move, 20 possibilities each leading to checkmate in 1.

    When white is on the move, Nd4! creates another zugzwang position with checkmate in 1 after all black's moves.
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    19 Jun '05 11:48
    Originally posted by skeeter
    Nope . Sorry. ..Qxd4. Rf5 is not mate.

    skeeter
    NO, but 1.Nd4 Qxd4 2.Qxh7#does
  14. Standard memberjfkjmh
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    19 Jun '05 12:43
    Originally posted by Mephisto2
    NO, but 1.Nd4 Qxd4 2.Qxh7#does
    That's exactly what I said. I'm sure you read my post, skeeter.

    I meant that after 1.Nd4 White threatens 2.Rg4#(not Rf5,sorry).

    Zugzwang means, it's a problem that it's your turn, but since white threatens mate (Rg4🙄, after 1.Nd4 white wins regardless whose turn it is. Therefore, if it's white to move (as the thread title indicates) there is no zugzwang.
  15. SubscriberBigDoggProblem
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    19 Jun '05 17:211 edit
    Originally posted by jfkjmh
    That's exactly what I said. I'm sure you read my post, skeeter.

    I meant that after 1.Nd4 White threatens 2.Rg4#(not Rf5,sorry).

    Zugzwang means, it's a problem that it's your turn, but since white threatens mate (Rg4🙄, after 1.Nd4 ...[text shortened]... hite to move (as the thread title indicates) there is no zugzwang.
    I agree that this problem isn't about zugzwang. After 1.Nd4, a move like 1...Ba1 does not change anything. If it were a true zugzwang, all of Black's moves would damage his position in some way.
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