No.861,862 (EB)

No.861, 862 
Erich Bartel (Germany)

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Original Problems, Julia’s Fairies – 2015 (II): July – December

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No.861, 862 by Erich Bartel – Promotions in stalemates with interesting fairy effects! (JV)


Definitions:

Disparate PY: If one side makes a move with a piece of type “x” (black, white, neutral, half-neutral, etc., King included), the other side cannot answer immediately by moving a piece of the same type “x”. (For example: white Qc1, black Ka8,Qa7 – mate in 1 move. After 1.Qc8#, Black is mated because 1…Qb8? is illegal. The mate is possible also with the neutral nQc1 – after 1.nQc8#. Black cannot move the same neutral Queen.) Every Pawn’s promotion is a Pawn’s move, therefore after such promotion (into any possible piece) the other side cannot answer immediately with its Pawn. We can say that after the move of the figure of type “x” any enemy figure of type “x” falls under Half-moving paralysis. This paralysis disappears immediately on the next half-move, if the opponent plays with another piece of type “y”. (“Disparate PY” is implemented as “Disparate” till the latest version of Popeye, PY 4.69. In WinChloe this version of Disparate will be available starting the next version, 3.32.)

Circe: Captured units (not Ks) reappear on their game-array squares, of the same colour in the case of pieces, on the file of capture in the case of pawns, and on the promotion square of the file of capture in the case of fairy pieces. If the rebirth square is occupied the capture is normal.

PWC: When a capture is made, the captured unit (except a King) is replaced on the square the capturing unit just leaves. A Pawn is immovable on its 1st rank.

Alphabetical Chess: The squares are considered in the order a1, a2…a8, b1…b8, c1 and so on to h8. At each turn, only the unit standing on the square which comes earliest in this order may move. However check and mate are normal.

Madrasi: Units, other than Kings, are paralysed when they attack each other. Paralysed units cannot move, capture or give check, their only power being that of causing paralysis. Madrasi RI (rex inclusive): the rule applies to Kings as well, so the two Kings may stand next to each other.


No.861 Erich Bartel
Germany

original – 22.07.2015

Solutions: (click to show/hide)

white Pc6f6 black Kd1 Pa2b2c2d2e2f2g2h2

h=4*           b) Kd1→e1          (2+9)
Disparate PY


No.862 Erich Bartel
Germany

original – 22.07.2015

Solutions: (click to show/hide)

white Ba1 Qb1 Sc1 Rb2 Ka4 black Pa2c2a3b3c3b4 Kc4

h==5*                                        (5+7)
Circe PWC
Madrasi RI
Alphabetic Chess


9 Responses to No.861,862 (EB)

  1. Seetharamanseetharaman says:

    861… simple demonstration of Disparate! Dont know if the twin adds to the problem!

    862. is just amazing! two different AUWs with different final positions … Can’t imagine how the composer comes up with such ideas. Great!

  2. Seetharamanseetharaman says:

    862. well… slightly different final positions ! 🙂

  3. Joost de HeerJoost says:

    > Dont know if the twin adds to the problem!

    It creates a perpetuum mobile.

    • Georgy EvseevGeorgy Evseev says:

      Unfortunately, the twin is exact copy of original problem – it is a symmetric reflection of the board.

      And this is the main issue of this problem – it is too symmetric. I would sacrifice the picturesque line of black pawns for the sake of avoiding the symmetry, for example:

      white Pb6c6
      black Kd1 Pa2b2c2d2g2

      1…c6-c7 2.Kd1-c1 c7-c8=Q 3.Kc1-b1 Qc8*c2 + 4.Kb1-a1 b6-b7 =
      1.Kd1-e2 b6-b7 2.Ke2-f3 b7-b8=Q 3.Kf3-g4 Qb8-f4 + 4.Kg4-h3 c6-c7 =

      (This is not necessarily an improvement!)

  4. Bartel Erich says:

    Dear Mr. Evseev,
    if you like to do this it’s o.k.
    But it destroys my idea to show 2-fold two-corner-stalemate. And there’s no symmetry – all solutions/setplays ar different each other.

    • Georgy EvseevGeorgy Evseev says:

      Sorry, but the symmetry is absolute. In all phases there are four identical WTP positions (diagram and after the first move of black) – accurate to symmetry. And moreover, twin B is exact symmetric version of twin A.

      As I have written – my version is not necessarily an improvement, but it shows the direction I would have worked in your idea.

    • Seetharamanseetharaman says:

      The twin in fact shows identical play equal to reflecting the board!

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