Blog about chess problems
A cyclic change of the threat and two mates in two phases.
Scheme:
1.X ~ 2.A, 1…a 2.B, 1…b 2.C
1.Y ~ 2.B, 1…a 2.C, 1…b 2.A
A cyclic change of the threat and two mates in three phases.
Scheme:
1.X ~ 2.A, 1…a 2.B, 1…b 2.C
1.Y ~ 2.B, 1…a 2.C, 1…b 2.A
1.Z ~ 2.C, 1…a 2.A, 1…b 2.B
Kovacevic, Marjan
Mat Plus, 1997
3rd Prize
FIDE Album 1995-97
mate in 2 moves
The alphabetical list of the chess composition glossary terms.
Cyclic change of the first move, threat and mate to the same defence in two phases.
Scheme:
1.A ~ 2.B a 2.C
1.B ~ 2.C a 2.A
Cyclic change of the first move, threat and mate to the same defence in three phases.
Scheme:
1.A ~ 2.B a 2.C
1.B ~ 2.C a 2.A
1.C ~ 2.A a 2.B
Gockel, Hubert
Schach, 1993
1st Prize
FIDE Album 1992-94
mate in 3 moves
Three black moves appear in three tries in pairs: one as a defence, the other as a refutation. In the solution all of them are variations with new mates.
Scheme:
1.X? a 2.A, 1…c!
1.Y? b 2.B, 1…a!
1.Z? c 2.C, 1…b!
1.K a 2.D, 1…b 2.E, 1…c 2.F
Three black moves appear in three tries in triples: two as a defences, the third as a refutation. In the solution all of them are variations with new mates.
Scheme:
1.X? a 2.A, 1…b 2.B, 1…c!
1.Y? a 2.C, 1…c 2.D, 1…b!
1.Z? b 2.E, 1…c 2.F, 1…a!
1.K a 2.G, 1…b 2.H, 1…c 2.I
Barnes, Barry P.
Problemnoter, 1961
1st Prize
mate in 2 moves
The order of a key and a threat cannot be reversed between two phases.
Scheme:
1.A ~ 2.B
1.B ~ 2.A??
Three White moves occur in three phases in cyclical pairs: a key and a threat.
Scheme:
1.A ~ 2.B
1.B ~ 2.C
1.C ~ 2.A
Sanders, Ivor L.
The Problemist, 1993
mate in 2 moves
It is not possible to change the key and mate after the same defence in two phases.
Scheme:
1.A a 2.B
1.B a 2.A??
Three White moves occur in three phases in cyclical pairs: first move and mate after the same defence.
Scheme:
1.A a 2.B
1.B a 2.C
1.C a 2.A
Three White moves occur in three phases in cyclical pairs: first move and mate after different defences.
Scheme:
1.A a 2.B
1.B b 2.C
1.C c 2.A
Lačny, L’udovit
Pravda, 1981-82
1st Prize
FIDE Album 1980-82
mate in 2 moves
Dual avoidance in the threat.
Scheme:
1.X ~ 2.A (B??)
1.Y ~ 2.B (A??)
Scheme:
1.X ~ 2.A (B??)
1.Y ~ 2.B (C??)
1.Z ~ 2.C (A??)
Scheme:
*1…a 2.A, 1…b 2.B
1.X ~ 2.A (B??), 1…b 2.C, 1…x 2.B
1.Y ~ 2.B (A??), 1…a 2.D, 1…y 2.A
Parzuch, Stefan
Szachista, 2000
5th Prize
mate in 2 moves
In one phase, after two defences, there are two mates. In the second phase, there is one mate after the first defence and the other after the second.
Scheme:
1.X a 2.AB , 1…b 2.AB
1.Y a 2.A, 1…b 2.B
In one phase, after three defences, there are three mates. In the second phase, there is one mate after the first defence and the second after the second and the third after the third.
Scheme:
1.X a 2.ABC, 1…b 2.ABC, 1…c 2.ABC
1.Y a 2.A, 1…b 2.B, 1…c 2.C
Paslack, Rainer
C.Goldschmeding MT, Probleemblad, 1996
1st Prize
FIDE Album 1995-97
mate in 2 moves
Cyclic shift of three or more mates in two phases.
Scheme:
1.X a 2.A, 1…b 2.B, 1…c 2.C
1.y a 2.B, 1…b 2.c, 1…c 2.A
Cyclic shift of three mates in three phases.
Scheme:
1.X a 2.A, 1…b 2.B, 1…c 2.C
1.y a 2.B, 1…b 2.C, 1…c 2.A
1.z a 2.C, 1…b 2.A, 1…c 2.B
Rudenko, Valentin
Lačny-50 JT, 1976
2nd Prize
mate in 2 moves