Problem 45238. Checkmate

Created by Asif Newaz
Appears in Guess the Logic!

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The positions of different chess pieces are given in a cell p .
The position of the king is given as x

Determine if the opponent king is in check for individual scenerios.

x='Kg7'
p={'Qe5','Qg5','Qb5','Qa7'}

output= [1,1,0,1]

N.b.any invalid position should produce 0. u may imagine p as the white pieces and x as the black king for clarity.

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17 Solutions
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Last Solution submitted on Jan 24, 2025

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William on 22 Dec 2019

Asif,
Thanks, but my point is that the pawn is in row-1 in *both* cases, so they should both be in check or neither should be in check. Since you described 'x' as being the 'opponent King', I think that both should be in check.

Asif Newaz on 23 Dec 2019

william,
i might not have understood u totally.
what i meant to say is that -- there are some invalid position/moves. for example, the pawn can jump from a2 to a4 but not from a3 to a5-thats an invalid move. similarly a white pawn can never be at the location a1-- their position starts from a2-so placing a pawn in row-1 is an invalid move.
in test-6, the pawn in e1 could check the king - but its own position is invalid.it could not be in that position in the 1st place. thats why 0.
in test-2,3; the pawn is in h6. a pawn can be in the column-h or row-6.so thats a valid position.
https://en.wikipedia.org/wiki/Pawn_(chess)

William on 23 Dec 2019

Asif,
Aha! Tricky, and very clever. Thanks for posting this interesting problem!