No.230,231 (VK)

No.230, 231 
Václav Kotěšovec

Václav Kotěšovec & Nikola Predrag


Original Problems, Julia’s Fairies – 2013 (I): January – April

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No.230 – #2 by Václav Kotěšovec – An interesting interpretation of Lacny theme, using Royal Zebra. (JV)

No.231 – h#7 by Václav Kotěšovec – A fine Miniature with excellent play of the Fairy duet Grasshopper-Kangaroo. (JV)

No.230.1 – #2 by Václav Kotěšovec & Nikola Predrag – An improvement of No.230 based on the comments by Nikola PredragJanuary 26, 2013 and  Václav KotěšovecJanuary 28, 2013 (JV)


Grasshopper(G): Moves along Q-lines over another unit of either color to the square immediately beyond that unit. A capture may be made on arrival, but the hurdle is not affected.

Rookhopper: As Grasshopper, but moves on Rook lines only.

Bishophopper: As Grasshopper, but moves on Bishop lines only.

Zebra – (2,3) Leaper

Locust (L): moves on Q-lines but only by capturing an enemy unit, arriving on the square immediately beyond that unit, which must be vacant.

Rook-Locust (LR): Moves like Locust, but on Rook-lines only.

Bishop-Locust (LB): Moves like Locust, but on Bishop-lines only.

Nightrider(N): A Rider along a straight line on squares lying a Knight`s move away from each other.

Kangaroo (KA): Moves along Queen-lines like a Grasshopper, but over 2 hurdles (which may or may not stand on adjacent squares) to the square immediately beyond the second hurdle. A capture may be made on arrival, but the hurdles are not affected.

Anti-Andernach:A piece (excluding King) changes its color after any non-capturing move. After capture, the piece retains its color. Rooks on a1, h1, a8 and h8 can be used for castling, provided the usual other rules for that move are satisfied. After castling, Rooks do not change color, If White makes a non-capturing move with neutral or halfneutral piece, that piece becomes black and vice versa.

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.

No.230 Václav Kotěšovec
Czech Republic
#2                                                 (9+9)
b) Anti-Andernach
Royal Zebra f3
Rookhoppers: a6, e5, h1
Bishophoppers: d5, f8
Solutions: (click to show/hide)
No.231 Václav Kotěšovec
Czech Republic
h#7               3 solutions             (2+3)
Grasshopper g1
Kangaroo f4
Solutions: (click to show/hide)
No.230.1 Václav Kotěšovec & Nikola Predrag
Czech Republic / Croatia
Version of No.230, 28.01.2013
#2                                            (11+14)
b) Anti-Andernach
Royal Zebra e3

Rookhoppers: e1,e5
Bishophopper g1
Bishop-Locust d5
Rook-Locusts: a2, a8
Bishop-Lion g2
Nightrider g7
Kangaroo a6
Solutions: (click to show/hide)

5 Responses to No.230,231 (VK)

  1. Seetharamanseetharaman says:

    N.230. This composer has done many beautiful problems using the Hybrid. Once you understand what happens here you admire the simple but intriguing concept of selfblock moves becoming guarding moves ! Great !

  2. Nikola Predrag says:

    I’ve seen only few fairy direct mates and to me, such change of effects on the same squares arranged in a cycle looks incredible. Flaws in aesthetic and economy, caused by a construction of the keys, still do not spoil the purity of the idea.

    Could the flaws in economy and aestethic be justified in a sixfold cycle?

    Black royal Ze3
    White Sc7 Pd7 Ng7 Pf6 RHe5 Sb4 Pf4 Sh4
    Pg3 Sf2 Kc1
    Black LRa8 Pb7 KAa6 Pb6 Ph6 LBd5 Pf5
    Pg4 LRa2 Pc2 BLg2 RHe1 BHg1
    Twin Condition AntiAndernachChess

    a) 1.RHe7-e2! Zz
    1…RHb1 (a) 2.Kd2# (A)
    1…b5 (b) 2.Scxd5# (B)
    1…BLc6 (c) 2.Sbxd5# (C)
    1…RHh1 (d) 2.Sxg4# (D)
    1…h5 (e) 2.Nxf5 (E)
    1…KAg6 (f) 2.Sxf5# (F)

    b) 1.d8=bBH! Zz
    1…RHb1=wRH (a) 2.Scxd5# (B)
    1…b5=wP (b) 2.Sbxd5# (C)
    1…BLc6=wBL (c) 2.Sxg4# (D)
    1…RHh1=wRH (d) 2.Nxf5# (E)
    1…h5=wP (e) 2.Sxf5# (F)
    1…KAg6=wKA (f) 2.Kd2# A

    Few tries in b)
    1.d7-d8=bKA? 1…KAd8-a5=wKA!
    1.d7-d8=bBL? 1…BLd8*h4!
    1.d7-d8=bRH? 1…RHd8-d4=wRH!
    1.d7-d8=bLB? 1…LBd8*f6-g5!

  3. 6-fold cycle is certainly better, also keymove in b) is good, it’s only pity that technical pieces (rook-locust and bishop-locust) are necessary. But probably is no other chance for guarding of c2 (squares b1 and b2 must be free and any possible move of such piece would be refutation). Rook-locust a8 is not necessary in b), but in a) eliminate many cooks after promotion of pawn d7 and can be place on b8, f8 or h8. I not found better construction of this version. Summary: I seem version by Nikola Predrag as improvement of my problem and propose publish it as joint problem 230a.
    (Dear Julia, I will send you new diagram and WinChloe files by e-mail immediately)

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