Change of defence motives with cyclic effects 4

Many other orthodox examples appeared in various competitions in seventies. Some of them were mentioned earlier (Change of defence motives with cyclic effects 1, 2, 3), here are provided problems from various sources, majority beeing included in Czechoslovak Album.
Karol Mlynka
3rd-4th HM SSZ C 28.2.1970

1.Kxb3? th. 2.Sc2#
1...Rxd3+ (checking - A) 2.Qxd3#
1...Sc4 (pinning - B) 2.Qxc4#
1...Bd6 (unblocking - C) 2.Rxd6#
1...e1S!

1.c7! th. 2.Sc6#
1...Rxd3 (unblocking - C) 2.Qxd3#
1...Sc4+ (checking - A) 2.Qxc4#
1...Bd6 (pinning - B) 2.Rxd6#

OM-23-33 without almost obligatory motive of guarding.









#2 (11+10)
Zoltan Labai
516 Pravda 14.7.1972
In 1st Album of Czechoslovak chess compositions 1972-1973

1.Qc1? th. 2.Qxc4#
1...Sc3 (interposing - A) 2.Qe3#
1...Sd6 (direct guarding - B) 2.Qe3#
1...f5 (unpinning - C) 2.Se6#
1...c3!

1.Qg5! th. 2.Qxd5#
1...Sc3 (unpinning - C) 2.Qe3#
1...Sd6 (interposing - A) 2.Qe3#
1...f5 (direct guarding - B) 2.Se6#

OM-23-33 with weakness in the fact that two thematical defences are followed by the same mate.









#2 (8+9)
Juraj Brabec
6992 Schach-Echo 6/1972
In 1st Album of Czechoslovak chess compositions 1972-1973

1.Sh6? th. 2.Sd5#
1...d5 (pinning - A) 2.Be5#
1...Se3 (direct guarding - B) 2.Bxe3#
1...Rc5!

1.exf5? th. 2.Re4#
1...d5 (direct guarding - B) 2.Be5#
1...Se3 (guarding by line opening - C) 2.Bxe3#
1...b1Q!

1.Sxg5! th. 2.Se6#
1...d5 (guarding by line opening - C) 2.Be5#
1...Se3 (pinning - A) 2.Bxe3#

OM-32-23.









#2 (8+11)
Zoltan Labai
3251 Sachove Umeni 9/1972
In 1st Album of Czechoslovak chess compositions 1972-1973

1.Bd2? th. 2.e4#
1...d5 (direct guarding - A) 2.Qxe6#
1...Sf7 (unpinning - B) 2.Qxg6#
1...Ra4!

1.Bc3? th. 2.Rxe5#
1...d5 (interposing - C) 2.Qxe6#
1...Sf7 (direct guarding - A) 2.Qxg6#
1...Ra5!

1.Bd8! th. 2.Rxf6#
1...d5 (unpinning - B) 2.Qxe6#
1...Sf7 (interposing - C) 2.Qxg6#

OM-32-23.









#2 (9+10)
Zoltan Labai
3510 Sachove Umeni 5/1973
In 1st Album of Czechoslovak chess compositions 1972-1973

1.Sg4? th. 2.Sf6#
1...Rxg4 (capturing of threat unit - A) 2.Rxg4#
1...dxe2 (providing flight by capture - B) 2.Qc2#
1...Rxf8 (guarding - C) 2.Qb7#
1...Bd4!

1.Rxg5! th. 2.Sg3#
1...Rg4 (guarding - C) 2.Rxg4#
1...dxe2 (capturing of threat unit - A) 2.Qc2#
1...Rxf8 (providing flight by capture - B) 2.Qb7#

OM-23-33.









#2 (9+10)
Zoltan Labai
5th HM CSSZ C 31.12.1973
In 1st Album of Czechoslovak chess compositions 1972-1973

1.Qh4? th. 2.Qd4#
1...Sc6 (direct guarding - A) 2.axb3#
1...Be4 (interposing - B) 2.Rxd4#
1...e5!

1.Qd8? th. 2.Qd5#
1...Be4 (direct guarding - A) 2.Rxd4#
1...Sd6 (interposing - B) 2.Sb6#
1...e6!

1.Qe8! th. 2.Qb5#
1...Sd6 (direct guarding - A) 2.Sb6#
1...Sc6 (interposing - B) 2.axb3#

OM-32-32. Elegant triple of defences!









#2 (8+12)

Comments to Juraj Lörinc.
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