No.1616
Marjan Kovačević
(Serbia)
Original Fairy problems
JF-2021-I:
01.01.2021 - 30.06.2021
No. 1616 Marjan Kovačević
Serbia
original - 30.05.2021
black Qg1 Nh4 Rb7 Pa7 Ka8
white Bh2a4 Qd2 Ka5 Ne8
hs#2.5 b) Rb7-->b6 5+5
Nightrider e8, h4
Nightrider e8, h4
Solution: (click to show/hide)
Amazing! A New German style hs# with a main plan and two fore plans. Shown twice with a complex sequence involving double pins and anticipatory mutual interferences by the BQ/BN. The WQ/WN also exchange roles of pinning the BR and the checking of the BK on the last move – also resulting in reciprocal change of W 2nd and 3rd moves. An extended version of ODT with addition of N lines: See the line diagram. All this with only 10 pieces!
Thanks, Shankar! Glad you like the mixing of “schools” of direct play and help-play!
There are some elements from other schools too!
I would rather avoid a pin-model in one phase only, but couldn’t. Luckily, there is another link between the mates: they both appear on the squares vacated by the twinning Rook.
Very interesting strategy: Black must mate by interposing on a check line, so White’s checking piece must be pinned – but then Black’s pinner can capture instead of the desired mate by interposition. So Black’s mating piece must close the black pin-line in advance, turning it into a masked pin that is activated by the mating move.
The normal tactic is to have White pin Black’s pinner, but this is much more unusual (is it even new?!). Of course this has been set with an exchange of functions of the black pieces – but a white exchange of pin-based functions has been added too! And, as Shankar mentioned, all this with only 10 pieces – it’s very impressive!