carousel theme

Scheme:
1.X a 2.A, 1…b 2.B
1.Y b 2.C, 1…c 2.A
1.Z a 2.B, 1…c 2.C

counter carousel theme

Scheme:
1.X a 2.A, 1…b 2.B
1.Y b 2.C, 1…c 2.B
1.Z a 2.C, 1…c 2.A

Zalokockij, Roman; Udarcev, Valentin
Moloda Galichina, 1993
1st Prize

mate in 2 moves

Burmistrov combination

In the first phase, white has a double threat, and there is the third mate after black defense. In the next two phases, the third mate becomes a threat, while after a thematic defense, the first and second threat moves become mates.

Scheme:
1.X ~ 2.AB, 1…a 2.C
1.Y ~ 2.C, 1…a 2.A
1.Z ~ 2.C, 1…a 2.B

Mażul, Waldemar
Schach (magazine), 2000
1st-2nd Prize

mate in 2 moves

Zilahi theme

A white unit that is captured in one phase mates in the other and vice versa.

double Zilahi theme

1. There are two thematic pieces and four phases in which one piece is beaten and the other mates.

2. There are four thematic pieces. In one phase the first piece is captured and the second one mates. In the second phase is the opposite. In the third phase, the third piece is captured and the fourth one mates. In the fourth phase the fourth unit is captured and the third one mates.

cyclic Zilahi theme

The white piece that mates in the first phase is captured in the next. The white piece that mates in the last phase is captured in the first.

extended Zilahi theme

In one phase, the white mating unit and the other, which is involved in mating, are captured in the second phase, and vice versa.

Tura, Waldemar
Wola Gułowska, 1996
4th Prize

helpmate in 2 moves