New ideas in fairy chess 2 - SAT
So finally the dust has settled and the definitions of SAT family fairy conditions are hopefully
definitive. The old definition given on this page, is rebaptized as a "Sharp SAT", while name "SAT" was
given to simpler and understandable fairy condition. My view that SAT is a very fairy condition with
good perspective, was proven by successful thematical tourney as well as other recent very interesting
compositions by various authors. Compliments to Ladislav Salai sr., who invented the condition!
Definicie a komentar - Definitions and comment
SAT: strana je v sachu, pokial jej kral ma tah podla ostatnych (ortodoxnych, resp. dalsich) pravidiel.
(Logicky, strana na tahu je v mate, pokial je v sachu rem a tato strana nemoze tento sach zrusit.)
SAT: a side is checked if its king can move according to other (orthodox or other given fairy) rules.
(Logically, a side to move is checkmated if it is checked and it cannot parry the check by own move.)
I would like to emphasize that this definition is as consistent as possible and it is simple
enough to be coded into solving program. As far as I know, it can be solved by special version of Popeye
(When it will be included in official release? It is a question...) and also by WinChloe that allows
its combinations with the many-many other fairy elements thanks to well fore-thought algorithms. (Great,
The award of first section of abovementioned thematical tourney showed many
interesting direct problems:
some long moremovers, but also modern twomovers and above all it turned out SAT is very suitable for selfmates.
The unofficial match between Czechia and Slovakia, running now, has one of sections dedicated to SAT selfmates.
We will see...
Ostry SAT: strana je v sachu pokial jej kral ma aspon jedno volne pole. (Logicky, strana na tahu je v mate,
pokial je v sachu rem a tato strana nemoze tento sach zrusit.) Od chvile prveho napadnutia krala superovym
kamenom sa za volne pole povazuje aj pole, na ktorom sa kral nachadza, ak nie je napadnute superom.
Sharp SAT: a side is checked if its king has at least one flight. (Logically, a side to move is checkmated if
it is checked and it cannot parry the check by own move.) Beginning by the first attack of king by
enemy unit, the square occupied by king is considered to be his flight when this square isn't attacked.
Sharp SAT seems to me to be too complicated... but well, it exists and if someone likes it, he can try composing.
(Old definitions that appeared here had some defects that was caused by me. Thanks to Olivier Ronat
for pointing it!)
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