No.1249 (JR)

No.1249
Jacques Rotenberg (France/Israel)

Warm welcome to Jacques in
Original problems section of JF!

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Original Fairy problems
JF-10/2017-3/2018:
October’2017 – March’2018


Definition: (click to show/hide)


No.1249 Jacques Rotenberg
France/Israel

original – 13.11.2017
Dedicated to Seetharaman Kalyan

Solution: (click to show/hide)

White Kf3 Qb4 Rf6 Bh8 Sf8g3 Pg7d6g6g4 Black Kh6 Rd4 Bb8d1 Pc5

#2                                               (10+5)
Superguards


4 Responses to No.1249 (JR)

  1. Georgy EvseevGeorgy Evseev says:

    Good, non-standard motivations, but the flight g5 taken by the key in both thematic phases looks very gaping.

    I understand that Kg5# looks like very organic dual if this square is guarded, but still the position simply asks to find the form of setplay+solution, even though this does not seem to be easy.

  2. Jacques Rotenberg says:

    Thank you Georgy for your comment.
    I agree with you that it could be better to avoid flight taking keys, but I think it’s not that important here.
    In any case, if you want to propose a version, please do!

  3. Seetharamanseetharaman says:

    Thanks Jaques Rotenberg for your dedication. It is superb idea with an unusual motivation for the reciprocal change. In view of the excellent use of the fairy condition for the change and since the try also takes the flight, I suppose flight taking key is excusable. However I wonder if the added tries add extra value.

  4. Jacques Rotenberg says:

    Thank you Seetharaman Kalyan for that wonderful invention! and for the very interesting tournament you organized.

    Here are, in my vue, the reasons why the tries have to be shown:
    a) this bunch of flight taking tries shows more than many words that the flight taking key does not induce here a too much simple problem to solve.
    b) 1.Se6? ~ 2.g8=S# 1…Bxd6! seems a better move than the key – more central move – and the interception of f6-d6 has some strategic value, also the refutation involving a specific guard on f4 is welcome.
    c) 1.Rf5? ~ 2.g8=S# 1…Bb3 2.Rh5# shows an additional changed mate
    d) 1.Se4? ~ 2.Qd2#, 2.g8=S# 1…Rd5!
    – underlines the fact that the two thematic whites pieces are associated to the guard of h5 (2.g5+? Kh5!)
    – gives a new importance to the thematic move 1…Rd5 which appears now as a refutation
    – brings a transferred and changed mate 1…Bb3 2.Qd2# using the unexpected guard of d2 by the knight

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