No.1720 (RK) – Julia's Fairies

No.1720
Ralf Krätschmer
(Germany)

Original Fairy problems
JF-2022-I:
01.01.2022 - 30.06.2022

No. 1720 Ralf Krätschmer
Germany
original - 29.06.2022
Dedicated to Andreas Thoma

white Pf4 Kh5 Rf3 black Pc3c5d5e5e3e7h6 Se4 Re6 Kf5

#10 3+10
MinDister
The pieces f3 and e6 are S1 and S2

Solution: (click to show/hide)

conditions	'Dister'	условия
Dister:	(= abridgement of distancer) focuses on the maximal distance between two particular pieces, the reference pieces S1 and S2, which are defined in/below the diagram. The condition maxdister forces Black to play so that the distance between S1 and S2 is maximal after the move (including possible rebirths). Checks against the opponent king are normal (like in the maximummer). Parrying checks takes priority over dister. Black may capture a reference piece, if it would be removed from the board when captured, only when there is no other move available. Reflex(stale)mate takes priority over dister. The condition can be applied to White (weissermaxdister) or can be valid for both sides (maxmaxdis-ter). The condition mindister addresses minimal distance instead of maximal distance. Mixed types are possible for White and Black, for example maxmindister as combination of weissermaxdister and schwarzermindister. If a pawn is reference piece, then promoted pieces take over this role. Similar for fairy metamorphoses (e.g. chameleon chess, Einstein chess). (presented in Andernach meeting 2022, by Andreas Thoma)