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Posers and Puzzles

Posers and Puzzles

  1. 15 May '08 17:54
  2. Standard member SwissGambit
    Caninus Interruptus
    15 May '08 18:15
    Originally posted by doodinthemood
    [fen]8/8/8/8/3BN1R1/Q2p1k1P/1p3p2/5K2 w[/fen]
    1.Qb3!
    1...a1R/Q 2.Qd1+ R/Qxd1#
    1...a1B 2.Qxd3+ Bxd3
    1...a1N 2.Nd2+ Nxd2#


    Yours?
  3. 15 May '08 18:32
    Originally posted by SwissGambit
    1.Qb3!
    1...a1R/Q 2.Qd1+ R/Qxd1#
    1...a1B 2.Qxd3+ Bxd3
    1...a1N 2.Nd2+ Nxd2#


    Yours?
    Notation error (the pawn is on b2, not a2). I thought selfmates (just like helpmates) were always Black to move first, but I have never actually tried any, so I guess I was wrong in the assumption.
  4. 15 May '08 18:51
    Originally posted by SwissGambit
    1.Qb3!
    1...a1R/Q 2.Qd1+ R/Qxd1#
    1...a1B 2.Qxd3+ Bxd3
    1...a1N 2.Nd2+ Nxd2#


    Yours?
    Well done
    And yes it's mine. Any suggestions for improvement? I could have spent more time over it, and with most puzzles I stick a few more moves in it so the key is more hidden, but I thought it wouldn't be worth it here.
  5. 15 May '08 19:15
    Originally posted by doodinthemood
    Well done
    And yes it's mine. Any suggestions for improvement? I could have spent more time over it, and with most puzzles I stick a few more moves in it so the key is more hidden, but I thought it wouldn't be worth it here.
    I have no credentials at all, but I like it as it is now.
  6. Standard member SwissGambit
    Caninus Interruptus
    15 May '08 19:36
    Originally posted by doodinthemood
    Well done
    And yes it's mine. Any suggestions for improvement? I could have spent more time over it, and with most puzzles I stick a few more moves in it so the key is more hidden, but I thought it wouldn't be worth it here.
    It would be neat if there was a different mate for the Q promotion than R, but I don't see how you could motivate it.
  7. 15 May '08 22:17 / 1 edit
    Originally posted by SwissGambit
    It would be neat if there was a different mate for the Q promotion than R, but I don't see how you could motivate it.
    Which reminds me of the following problem:

    Selfmate in 3
  8. Standard member SwissGambit
    Caninus Interruptus
    15 May '08 23:13 / 1 edit
    Originally posted by David113
    Which reminds me of the following problem:
    [fen]7N/Ppp2P2/Rrk4P/K1P5/1P2P2P/2P4Q/5p1R/5NB1 w[/fen]
    Selfmate in 3
    Haha, I thought of that one too. Nothing encourages a new composer like showing their same theme done much better.
  9. 16 May '08 07:23 / 2 edits
    1. a8=B!
    1. ... Rxa6#
    1. ... fxg1=Q
    2. f8=Q!
    [quote]2. ... Rxa6#
    2. ... Qxh2 3. Nxh2 Rxa6#
    2. ... Qh1 3. Rxh1 Rxa6#
    2. ... Qxf1 3. b5+ Qxb5#
    2. ... Qg2 3. Rxg2 Rxa6#
    2. ... Qg3 3. Nxg3 Rxa6#
    2. ... Qg4 3. Qxg4 Rxa6#
    2. ... Qg5 3. hxg5 Rxa6#
    2. ... Qg6 3. Nxg6 Rxa6#
    2. ... Qg7 3. hxg7/Qxg7 [COOK'D] Rxa6#
    2. ... Qg8 3. Qxg8 Rxa6#
    2. ... Qf2 3. Rxf2 Rxa6#
    2. ... Qe3 3. Nxe3 Rxa6#
    2. ... Qd4 3. cxd4 Rxa6#
    2. ... Qxc5+ 3. b5+ Qxb5#

    1. ... fxg1=R
    2. f8=R
    2. ... Rxa6#
    2. ... Rh1 3. Rxh1 Rxa6#
    2. ... Rxf1 3. Rxf1 Rxa6#
    2. ... Rg2 3. Rxg2 Rxa6#
    2. ... Rg3 3. Nxg3 Rxa6#
    2. ... Rg4 3. Qxg4 Rxa6#
    2. ... Rg5 3. hxg5 Rxa6#
    2. ... Rg6 3. Nxg6 Rxa6#
    2. ... Rg7 3. hxg7 Rxa6#
    2. ... Rg8 3. Rxg8 Rxa6#

    1. ... fxg1=B
    2. f8=B!
    2. ... Rxa6#
    2. ... Bxh2 3. Nxh2 Rxa6#
    2. ... Bf2 3. Rxf2 Rxa6#
    2. ... Be3 3. Nxe3 Rxa6#
    2. ... Bd4 3. cxd4 Rxa6#
    2. ... Bxc5 3. Bxc5 Rxa6#

    1. ... fxg1=N
    2. f8=N!
    2. ... Rxa6#
    2. ... Ne2 3. Rxe2 Rxa6#
    2. ... Nf3 3. Qxf3 Rxa6#
    2. ... Nxh3 3. Rxh3 Rxa6#

    [/quote]
  10. 16 May '08 07:24 / 3 edits
    Edit: no edit to edit out the messy display. OK one edit for a wrong move. Second edit for another flaw. I missed that Qxf1 covers a6 (shame on me)
  11. 16 May '08 07:32
    I can understand why knight needs to be met with knight in that one, but why can the other three not be met by queen?
  12. 16 May '08 07:34 / 1 edit
    Originally posted by doodinthemood
    I can understand why knight needs to be met with knight in that one, but why can the other three not be met by queen?
    1. ... fxg1=R 2. f8=Q? (I thought that was possible too) but: 2. ... Rxf1! 3. Qfxf1 and now 3. ... Rxa6+ is no mate because a6 is covered by the wQf1.

    1. ... fxg1=B 2. f8=Q Bxc5 and now 3. bxc5 Rxa6+ is no mate.

    1. ... fxg1=Q 2. f8=Q is correct.
  13. Standard member SwissGambit
    Caninus Interruptus
    16 May '08 07:58 / 1 edit
    Originally posted by heinzkat
    [b]1. a8=B!
    1. ... Rxa6#
    1. ... fxg1=Q
    2. f8=Q!
    [quote]2. ... Rxa6#
    2. ... Qxh2 3. Nxh2 Rxa6#
    2. ... Qh1 3. Rxh1 Rxa6#
    2. ... Qxf1 3. b5+ Qxb5#
    2. ... Qg2 3. Rxg2 Rxa6#
    2. ... Qg3 3. Nxg3 Rxa6#
    2. ... Qg4 3. Qxg4 Rxa6#
    2. ... Qg5 3. hxg5 Rxa6#
    2. ... Qg6 3. Nxg6 Rxa6#
    2. ... Qg7 3. hxg7/Qxg7 [COOK'D] Rxa6#
    2. ... Qg8 3. Qxg8 ...[text shortened]... ... Ne2 3. Rxe2 Rxa6#
    2. ... Nf3 3. Qxf3 Rxa6#
    2. ... Nxh3 3. Rxh3 Rxa6#

    [/quote][/b]
    If there are two different 2nd moves [or later] that work for White, those are called 'duals', not cooks.

    In a task of this magnitude, a minor dual or two is forgivable [say, two third moves that work].
  14. Standard member SwissGambit
    Caninus Interruptus
    16 May '08 08:05 / 1 edit
    Originally posted by doodinthemood
    I can understand why knight needs to be met with knight in that one, but why can the other three not be met by queen?
    1...fg1R 2.f8Q? Rxf1! 3.Qxf1 Rxa6+ is not mate because the Q guards a6.
    1...fg1B 2.f8Q? Bxc5! 3.bxc5 opens up b4 so 3...Rxa6+ is again not mate.

    And the Queen is of course met by Queen.

    Edit: beaten to the punch.
  15. 16 May '08 08:07 / 1 edit
    Originally posted by SwissGambit
    If there are two different 2nd moves [or later] that work for White, those are called 'duals', not cooks.

    In a task of this magnitude, a minor dual or two is forgivable [say, two third moves that work].
    I knew it it, sorry, but I was confused by the 'cook' I had found after 1. ... fxg1=R with 2. f8=Q? (indeed I found out that 2. ... Rxf1 3. Qfxf1 Rxa6 is no mate, after having posted it already, shame on me). I was a bit too enthusiastic in calling all extra solutions 'cooks'.