Please turn on javascript in your browser to play chess.
Only Chess Forum

Only Chess Forum

  1. Standard member SwissGambit
    Caninus Interruptus
    22 Sep '11 23:55 / 1 edit
    Yosi Retter<br>StrateGems 2011



    Mate in 2 moves
    a) diagram
    b) move Ba2 to b1
  2. 23 Sep '11 01:24
    Originally posted by SwissGambit



    Mate in 2 moves
    a) diagram
    b) move Ba2 to b1
    I can only do this in 3. Obviously coming back from the pub is not the best time to try. Will give this more thought tomorrow
  3. 23 Sep '11 01:45
    a.
    Ng7

    b.
    c4
  4. Standard member SwissGambit
    Caninus Interruptus
    23 Sep '11 07:53
    Still looking for the full solution and the theme ... can anyone spot it?
  5. 23 Sep '11 08:05 / 3 edits
    I don't quite get what the two parts are.

    And is it black to move?
  6. Standard member SwissGambit
    Caninus Interruptus
    23 Sep '11 08:12 / 1 edit
    Originally posted by VelvetEars
    I don't quite get what the two parts are
    First, just solve the diagram for Mate in 2 as normal. It's white to move.

    Next, move the white bishop on a2 to b1, then solve for mate in 2 again from that position. [White to move]
  7. 23 Sep '11 09:47 / 6 edits
    I'm probably being daft but how is Savielly's solution wrong?
  8. Standard member hempster
    she'll be right mate
    23 Sep '11 10:02 / 1 edit
    well all i can come up with is
    white c2-c3 check
    black d4xc3
    white c1-b2 checkmate

    its the only solution i can see
  9. 23 Sep '11 10:16
    Originally posted by hempster
    well all i can come up with is
    white c2-c3 check
    black d4xc3
    white c1-b2 checkmate

    its the only solution i can see
    In part a) Kd5 is on
    In part b) Kf5 is on
  10. 23 Sep '11 11:37 / 1 edit
    Originally posted by hempster
    well all i can come up with is
    white c2-c3 check
    black d4xc3
    white c1-b2 checkmate

    its the only solution i can see
    Hi Hempster

    Your solution is not mate.


    1.c3+ Kxc3 Bb2 + Black has 2..Kc2


    In these problems the position must always be legal, White always
    moves first and the first move is never a check.

    If the there is a mate starting with a check then problem is deemed ugly,
    cooked and unsound.

    Stay with it though, solving these things is like unravelling a tight knot.
    There is a genuine mate in two moves on the board infront of you.
    No tricks. Now dig it out. Solving one of these always gives you a glow.
  11. 23 Sep '11 13:53
    Originally posted by SwissGambit
    [hidden]Yosi Retter<br>StrateGems 2011[/hidden]

    [fen]2Q1N3/2Np4/1p1p4/1P1P2p1/3k1bR1/K2P4/B1P5/2BR4 w[/fen]
    Mate in 2 moves
    a) diagram
    b) move Ba2 to b1
    Ok, I've got the first variation...
    Going to need a little time for the second I reckon

    King has to move because everything else is pinned. Ng7 is the first move, so that pesky e5 flight square is a dead end after Bb2#. So the other flight squares end up in checkmate if Kc5 then d4#, and if Kc3 then Ne6#. My God that was hard!
  12. 23 Sep '11 14:08
    Got the second one!

    c4?! King has three flight squares again. If Kc5 Ne6#, or Kc3 Bb2#, and if Ke5 d4#


    Very tough SG, I've devoted a fair amount of my working day on those
  13. 23 Sep '11 14:35
    Originally posted by VelvetEars
    I'm probably being daft but how is Savielly's solution wrong?
    Would have saved me a lot of time if I'd looked at Savielly's solution first, oops
  14. Standard member SwissGambit
    Caninus Interruptus
    23 Sep '11 19:35
    Originally posted by VelvetEars
    I'm probably being daft but how is Savielly's solution wrong?
    It's not wrong, it just isn't complete. A complete solution gives the possible black responses and mating continuations by white. See morgski's posts for an example.
  15. Standard member SwissGambit
    Caninus Interruptus
    23 Sep '11 19:51
    Originally posted by greenpawn34
    If the there is a mate starting with a check then problem is deemed ugly,
    cooked and unsound.
    Not necessarily cooked and unsound, but yes, generally ugly.

    One exception to the rule is longer problems - some of those start with checks. Here is an example.


    White to play and mate in 12
    Starts with 1.Bc6+, but this is not considered a flaw.