My debut in WCCI 2010-2012

Julia Vysotska

Solutions:

(I) 1.Qd4 cxd4 [wrK=rQ] 2.rQd1 LEd2 3.Gd5 + LExd5 [wrQ=rG] # – not 4.rGxd5(bK= brLE)?? – self-check!!

(II)1.Qb3 cxb3 [wrK=rQ] 2.rQg3 LEe3 3.Ga3 + LExa3 [wrQ=rG] # – not 4.rGxa3(bK= brLE)?? – self-check!!

Realization of the KoBul Kings fairy condition with activity of the both KoBul Kings:

– Active phase of the white KoBul King after sacrifice of the white Q -transformation to the Royal Q, which moves to the mating positions.

– Passive phase of the white Kobul King on the mating move – transformation to the Royal G, which has no possible moves to avoid the mate.

– Passive phase of the black KoBul King –  the only possible defense of the white King  (in the Royal G phase) – capture of the mating piece (bLE) – falls because it transforms the black King into Royal LE piece giving the self-check.

Double Ambush – black (Le) + white (rQ); Bristol theme – wG opens lines for the second moves of bLE; ODT; Model mates.

Julia Vysotska

Solutions:

a) 1…Sd4-e2 2.e7-e8=cQ cQa1-f6=cS + 3.Ke4-e5 + Kb7-b8 4.cQe8-d7=cS + cSf6*d7=cB #

(try: 1…Sd4-e6? 2.e7-e8=cQ cQa1-f6=cS + 3.Ke4-e5 + Kb7-b8 4.cQe8-d7=cS + cSf6*d7=cB – no mate, 5.Kf5!)

b) 1…Se5-g4 2.e7-e8=Q cBh8-b2=cR 3.Ke4-d4 + Kb7-a6 4.Qe8-b5 + cRb2*b5=cQ #

(try: 1…Se5-c4? 2.e7-e8=Q cBh8-b2=cR 3.Ke4-d4 + Kb7-a6 4.Qe8-b5 + cRb2*b5=cQ – no mate, 5.Kd3!)

• Creation of black reciprocal batteries CS/CB & CR/CQ after critical moves of black Chameleons.
• Interchange of functions between the both black Chameleons.
• Thematic tries of black S with Bivalve-theme.
• Play of two King’s batteries K/B from both sides.
• White promotions in Q and CQ.

Julia Vysotska

Solutions:

a) 1.PAa5-a6 Nc8-e4 2.Rf3-f5 Ne4*a6=wN + 3.Rf5-d5 + Bg8*d5=wB #

b) 1.PAa5-a2 Bg8-d5 2.Rf3-e3 Bd5*a2=wB + 3.Re3-e4 + Nc8*e4=wN #

Sacrifices of white PAO (on a2/a6) with the goal: Annihilation + change of color of the black B and N.

Unpins of white Rf3 with Ne4/Bd5; black half-battery play N-B/PAO; creation of black batteries N/VAO and B/VAO.

Model mates after three white pins (2 active and one passive).

Julia Vysotska

Solutions:

a) 1.Sc1 nGb1 2.Sd3 nGb6# (3.nGd6? 3.nGe3? 3.nLic5? or not also 3.Gb4?)

b) 1.Sg2 nGh2 2.Se3 nGd6# (3.nGb6? 3.nGd3? 3.nLid5? or not also 3.Gf4?)

Creation of neutral anti-batteries (nG/nLi) with 3 tries of a neutral Gs on the mating move in each solution, which gives a self-check, creating a specific anti-batteries. Opening of line (for the nGs) and self-blocks on the black’s second moves.

Julia Vysotska

Solutions:

Set-play: 1.Qf4 nMO×e4+ 2.Kf5 nMOg3‡

1…Ka4 2.Qe7 nMA×d6+ 3.Kf6 nMAe8‡

• Block of the neutral Locust by the white King; Zilahi theme;
• Reciprocal transformation of neutral batteries: Initial battery MOA/LO to MAO/LO and initial battery MAO/LO to MOA/LO after reciprocal captures of their forward-pieces.
• Bi-valve realized by the black Q: line opening for the neutral Mao/Moa, line closing for the neutral Moa/Mao on the mating move. Distant self-block by the black Q.
• Pins of black Q by the neutral Mao/Moa.

Julia Vysotska

Solutions:

(I) 1…nRg1 2.Sa8 nRa1 3.S×b6 nPA×a1‡

(II) 1…nRg8 2.Sc3 nRd8 3.S×a4 nVA×d8‡

• Zilahi; 
• selfblocks with simultaneous selfpins of black Sa2/Sc7;
• change of functions of Sa2 and Sc7;
• neutral battery VA-MA / PA-MO play with sacrifice of neutral R for VA/PA move; 
• change of functions of nMOA-b3 and nMAO-b7.