Knight tour

White Knight plays on all eight fields available to him.

Bartolovic, Hrvoje
Problem, 1970
1st Prize
FIDE Album 1968-70

mate in 2 moves

Harkov theme

The try is defeated by at least two black moves which become defences in variations after the key.

Scheme:
1.X? a!/b!
1.Y a 2.A, 1…b 2.B

Harkov 2 theme

The refutation of the first try is a variation in two other phases.

Scheme:
1.X? a!
1.Y a 2.A
1.Z a 2.B

Mażul, Waldemar
Probleemblad, 1998
2nd honourable mention

mate in 2 moves

round trip

In the course of the solution, one piece makes a circular (or elliptical) trip and returns to its starting square.

Skerlovnik, Drago
Belgrad – Slovenia, 1970
1st Place

helpmate in 4 moves