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MatPlus.Net Forum Competitions Belgrade Internet Tourney 2008

On occassion of the 5th Belgrade Festival two thematic tourneys (#2 and h#2) have been announced:
http://www.matplus.net/pub/zip/5bit.pdf (112K)

The closing date is April 28th, so you are invited to start composing immediately!

In Serbian language:
http://www.matplus.net/pub/zip/5bits.pdf (120K)

Q. @ 2#.
In the example, remove the Bb1.
1.Nc1 Bc4
Are now the mates Nd3 and Ne2 thematic?
(Ignore that Bc4 parries nothing :-)

Hauke

QUOTE
Are now the mates Nd3 and Ne2 thematic?

According to theme definition: Yes (both are battery and shut-off mates, though dualistic in this sketch)

The example shows direct batteries. Are indirect batteries also thematical ?

Yes!
The judge gave an explanation: "all kinds of batteries are allowed, including indirect and masked ones"!
Marjan

Another question by one composer:
"Is Bristol clearance in key of #2 thematic opening of black line? Is anti-Bristol in mating move thematic way to close of black line?"
Marjan

Concerning the h#2 theme:

Is this single solution problem thematic?
UA
(= 5+2 )
h#2
1.Qc1 Rd2 2.Qc6+ Se6#
WR acts as front piece of an indirect battery on the 1st move and rear piece of a direct battery on the 2nd move.

UA
(= 6+6 )
h#2
1.Bc6 R:d2+ 2.Kd5 Sb3#
WR is front piece on the 1st move and rear piece on the 2nd move of different direct batteries.

QUOTE
Uri: Is this single solution problem thematic? ...

Since no official answer has been given yet here's my opinion:
According to the definition of theme single solution is thematic. However, if we "read between lines" it's clear that battery mates are expected in at least two phases. Moreover, it's hard to beleive that single phase problems would stand any chance for a good result against the multiphase ones.

Concerning #2 all kinds of line-opening and line-closing are allowed.
In h#2 battery means battery-mate.

The 5th Belgrade Problem Chess Festival is over. The results solving competitions and of both Internet composing tourneys are published in the official bulletin:
http://www.matplus.net/pub/zip/Belgrade_2008.pdf (954 KB, Language: partly Serbian and partly English)

The complete report, including lectures and photos, will appear in the Summer 2008 issue of Mat Plus Review.

Corrected version:

Only three pages (programme, list of participants and one solving table) have been changed.

BIT-2008 awards remained unchanged.