Friedrich Chlubna Memorial Tourney C 15.4.2006

The Austrian Chess Federation, in conjunction with the magazine Schach-Aktiv, announces an International Composing Tourney, to commemorate the life of the composer and author Friedrich Chlubna, who died on 6th January 2005.  The tourney will be in two sections:
  1. For helpmates in 2 moves with precisely 3 thematically related solutions. Problems with 4 or more solutions are not acceptable. No set theme.

    Judge: Chris. J. Feather (Stamford, England)

    Controller: Helmut Zajic, Parkgasse 5/5, 1140 Wien, Austria

  2. For direct-mates in 3 moves. No set theme.

    Judge: Michael Keller (Münster, Germany)

    Controller: Alexander Zidek, Große Sperlgasse 28/4, 1020 Wien, Austria
2 copies of each entry should be sent, on printed or stamped diagrams, to the relevant Controller as shown above.

Closing date: 15.4.2006 (this would have been Chlubna’s 60th birthday).

The composer of the 1st prizewinning problem in each section will receive a cash prize of EUR 100. There will be an additional fund of EUR 200 in each section, with prizes in the form of books.

Examples below - 2 h#2 with 3 solutions and 2 #3.
Friedrich Chlubna
1st Prize Die Schwalbe 1966

1.Se3 Sb3 (Sxe6?, Se2?) 2.Kf3 Sd2#

1.Be3 Sxe6 (Se2?, Sb3?) 2.Kf3 Sg5#

1.Re3 Se2 (Sb3?, Sxe6?) 2.Kf3 Rxf4#

Any black move to e3 would allow all 3 white continuations, however specific moves by S, B, R exclude 2 of them - classical example of dual avoidance in helpmate.









h#2 (5+8)
3.1.1.1
Friedrich Chlubna
Klaus Wenda
1st Comm Magyar Sakkélet 1974

1.Rgg6 Qxf3 2.Bxd2 Qf1#

1.Qh4 d4 2.Sxd4 Qxf3#

1.Rbg6 d3 2.Bxd3 Qxb3#

To allow mates by wQ on b3, f3 and f1, Black has to:

  • unpin wQ (directly or indirectly)
  • unguard mating square
  • selfpin his piece still staying on the line
This is the common strategy of black moves, white strategy is not so elaborated.









h#2 (5+11)
3.1.1.1
Friedrich Chlubna
1st Prize Schach 1971

1.Kd7? th. 2.Sec7#, Sdc7#
1...Bf5!

1.Kc6? th. 2.Sec7#, Sdc7#
1...Rf6!

1.Kd6! th. 2.Sec7,Sdc7#
1...Sf5+ 2.Kd7! th. 3.Sec7#, Sdc7#
1...Se4+ 2.Kc6! th. 3.Sec7#, Sdc7#

White just has to move his king away from c7, this would threat mate by both knights on c7. Tries are however parried by black double pinning moves. That is why White provokes checks by black knight, which effectively remove these strong defences. Good play of bK.









#3 (5+13)
Friedrich Chlubna
3rd HM Eeltje Visserman MT 1980

1.Re7! th. 2.Rxc7+ Sxc7 3.Bxd6#
1...Qg6+ 2.Qe4 (th. 3.Rxc7#, Re6#)
     2...dxe4, Qd6, Qxe4+ 3.Re5#, Qxd4#, Rxe4#
1...Qh2+ 2.Qe2 (th. 3.Rxc7#, Re5#)
     2...Qxe2+, Qh7+, Qd6 3.Rxe2#, Rxh7#, Qb5#

Excellent key indirectly upins bQ and starts white Bristol. Free black queen is able to deliver two different checks, White defends by wQ and the play forks into varied use of white R-B battery and wQ.









#3 (7+11)

Comments to Juraj Lörinc.
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