No.1294 (DT)

No.1294
Дмитрий Туревский (Россия) &
René J. Millour (Франция)

Оригинальные сказочные задачи
JF – 10/2017-3/2018:
октябрь’2017 – март’2018


Определения: (показать/спрятать)


No.1294 Dmitri Turevski
Russia

original – 30.03.2018

Solution: (click to show/hide)

white Ph7 Sd8 Ke8 black Pg6c7c4d4 Kd6 Rd7a1 Sc5h1 Bh3

#21                                           (3+10)
Black Maximummer
White Maximummer


No.1294.1 Dmitri Turevski &
René J. Millour

Russia / France

version of No.1294 – 04.04.2018

Solution: (click to show/hide)

White Pe7 Ka5 Sa4 Black Sh8 Sd7 Pg6 Kc4 Be4 Pb3 Pf3 Rh1

#21                                             (3+8)
Black Maximummer
White Maximummer


25 комментариев: No.1294 (DT)

  1. Juraj LörincJuraj Lörinc пишет:

    Nice outmaneuvering of bR and bB by wS, very well done!

  2. Marjan Kovacevic пишет:

    It looks as the first part of solution leads to losing tempo, not gaining, because White gives the order of moves to Black. Nice and joyful play around the corners, with pinning of Sd8 as the core moment to give white the freedom of choice.

  3. Nicolas Dupontdupont пишет:

    Very nice problem, but it seems there is something wrong with the obstacle. When the Bh3 stands on square e6, 12.Qxd4+ is illegal because of the longer move 12.Qxh1.

  4. shankar ram пишет:

    Could have been possible entry for for H-P.Rehm 80-JT? 😉

  5. Dmitri TurevskiDmitri Turevski пишет:

    The comments in the solution were updated to reflect corrections by Marjan and Nicolas.

  6. Paul Rãican пишет:

    The knight c5 seems to be useless. Isn’t it?

  7. Dmitri TurevskiDmitri Turevski пишет:

    There is a very strong cook:
    1.Sb7+ Ke5 2.Sd8 Ra8 3. h8=S! and two knignts checkmate quite quickly in double maximummer.
    There are several ways to prevent it, bSc5 seemed most economic.

  8. René J. Millour пишет:

    Dmitri, this is another view, Popeye 4.79 C+

    White Sd8 Ke8 Ph7
    Black Pc7 Kd6 Sg5 Bd4 Pc3 Ph3 Ra1 Sh1
    Stipulation #21
    Condition Blackmaximummer Whitemaximummer

    Set play: 1…Ra1-a8 2.h7-h8=Q Ra8-a1 3.Qh8*d4 #
    Actual play: 1.Sd8-c6 ! Ra1-a8 + 2.Sc6-b8 Ra8-a1 3.Sb8-a6 Ra1-g1 4.Sa6-b4 Rg1-a1 5.Sb4-a2 Ra1-g1 6.Sa2-c1 Bd4-h8 7.Sc1-b3 Rg1-a1 8.Sb3-a5 Ra1-g1 9.Sa5-c6 Rg1-a1 10.Sc6-b8 Ra1-a8 11.Ke8-f8 Ra8-a1 12.Sb8-a6 Ra1-g1 13.Sa6-b4 Rg1-a1 14.Sb4-a2 Ra1-g1 15.Sa2-c1 Bh8-d4 16.Sc1-b3 Rg1-a1 17.Sb3-a5 Ra1-g1 18.Sa5-c6 Rg1-a1 19.Sc6-d8 Ra1-a8 20.h7-h8=Q Ra8-a1 21.Qh8*d4 #

    Forcing Bd4 to play on h8 is paradoxical, preventing the promotion.
    Only 11 pieces.
    Model mate.

    • Dmitri TurevskiDmitri Turevski пишет:

      Thank you, René.
      Indeed, there are lighter versions possible, and I considered possibilities with the bishop on dark squares, but the Bd4-h8, while visually paradoxical, makes 11.Ke8-f8 the only legal move by white, and eliminates the choice, which was the point of the problem in the first place.

  9. René J. Millour пишет:

    Thanks, Joost, for mentioning that 11.Ke8-f8 is NOT “the only legal move by White”, as Dmitri asserts.
    The choice is NOT eliminated, as asserted. White has 2 legal moves. Among them, 11.Ke8-f8 is a true waiting move.
    It is also possible to have a 3rd legal move, wPh3 instead of bP, then 11.h3-h4 fails on 20.h4xg5.

    • Dmitri TurevskiDmitri Turevski пишет:

      True, I have missed Kd8, please excuse me. (Funny how many mistakes I make with this scheme, first publishing cooked problem in 2010, then all the variety of fallacies in сщььутеы).

      I wonder if it is possible to keep the choice between a tempo AND promotion while having a model mate in the end?

  10. René J. Millour пишет:

    Dmitri, please have a look on this other view, Popeye V4.79 C+

    White Pe7 Ka5 Sa4
    Black Sh8 Sd7 Pg6 Kc4 Be4 Pb3 Pf3 Rh1
    Stipulation #21
    Condition BlackMaximummer WhiteMaximummer

    Set play: 1…Rh1-a1 2.e7-e8=Q Ra1-h1 3.Qe8*e4 #
    Actual play: 1.Sa4-c3 ! Rh1-a1 + 2.Sc3-a2 Ra1-h1 3.Sa2-c1 Rh1-h7 4.Sc1-e2 Rh7-h1 5.Se2-g1 Rh1-h7 6.Sg1-h3 Be4-a8 7.Sh3-f2 Rh7-h1 8.Sf2-d1 Rh1-h7 9.Sd1-c3 Rh7-h1 10.Sc3-a2 Rh1-a1 11.Ka5-a6 Ra1-h1 12.Sa2-c1 Rh1-h7 13.Sc1-e2 Rh7-h1 14.Se2-g1 Rh1-h7 15.Sg1-h3 Ba8-e4 16.Sh3-f2 Rh7-h1 17.Sf2-d1 Rh1-h7 18.Sd1-c3 Rh7-h1 19.Sc3-a4 Rh1-a1 20.e7-e8=Q Ra1-h1 21.Qe8*e4 #

    “I wonder if it is possible to keep the choice between a tempo AND promotion while having a model mate in the end?”. You should be satisfied: here 11.e7-e8=Q is possible, but premature, failing on 12.Qe8-e1.

    Only 11 pieces.
    Model mate.

    • Dmitri TurevskiDmitri Turevski пишет:

      I think this is an excellent improvement: 11.e8=Q is premature, and 11.Ka4? selfblocks – we have the best of two worlds and a model mate!
      Can we submit this as a joint version (of course only if you are ok with it) to the most recent tourney of JF? That can be considered unfair by the other participants as the end date has passed.

  11. René J. Millour пишет:

    When I saw your 1294, I was a bit disturbed by Sc5 (just anti-cook), by Rd7 (heavy) and by “10.Sd8? Ra8 11.h8=Q” not refuted by “Be6 guarding d5” (as you first said) but by 12.Qxh1.
    I immediately tried to find a more economical position. But I must say this was not easy at all: I encountered lots of cooks in lots of positions. Thus, because I spent a long time on the matrix, I agree with your so nice proposal to have a joint version, for JF as you mention.
    Really glad to see your last enthusiastic comments, I am now myself very satisfied of the result.
    And I feel honored to sign with you!
    Thanks for all!

  12. shankar ram пишет:

    Julia, Please put a diagram for 1294.1!

  13. JuliaJulia пишет:

    Glad you’ve accepted it for your tournament! Thank you!
    Organizing Latvian solving championship tomorrow.. very busy these days. Will start to publish my “waiting list” from Sunday, 8th of April.

  14. René J. Millour пишет:

    Paul, I agree with you, this sequence is not a weakness.
    .
    1) This sequence is virtual and of course not a cook, as Popeye confirms.
    2) It contains so many moves that it is not to be compared with THE set play in only 3 moves, on which the problem is built, and it does not interfere with these 3 moves.
    3) It is not at all connected to the actual play and has in fact nothing to do with what is shown in this work [a cook has not either something to do with what is shown in a work, but I repeat: this sequence is not a cook].
    .
    What is shown in this work is a main plan in only 3 moves (expressed in the set play), which fails to a precise reason (it is White to play)… and which finally works after a long foreplan based on a “tempo manoeuvre” allowing a return close to the starting position, with Black to play… this return itself temporarily fails to another precise reason: the bB is now on a8 instead of e4… this needs a second execution of the “tempo manoeuvre” in order to bring back the B on e4… at this stage at last, the main plan works! This is also combined with wK waiting move, promotion and model mate.
    This independent virtual sequence neither adds nor subtracts anything to this logical content.

  15. René J. Millour пишет:

    Many thanks, Julia, for the new diagram + photo!
    .
    At http://juliasfairies.com/problems/jf-1017-0318/, I guess “problem, date, author, country, pieces” should be now “1294.1, 2018-04-04, Turevsky & Millour, Russia/France, 3+8”.
    .
    As 1294.1 is in the Meredith form, the statistics are slightly changed. “Meredith (>7, 12): 19” becomes “Meredith (>7, 12): 18”.
    .
    Thanks for all!

  16. JuliaJulia пишет:

    Yes, of course, the problem 1294.1 is added to the list at http://juliasfairies.com/problems/jf-1017-0318/ .
    Thank you, René!

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