Problem 45239. Checkmate-02

Created by Asif Newaz
Appears in Chess

Difficulty:Rate

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This is an extension of the problem https://www.mathworks.com/matlabcentral/cody/problems/45238-checkmate

If the king is in check, examine the next move of the king. List all those possible moves by which king can avoid the check by the next move.

Otherwise 'checkmate'.

r = king's location
p = position of opponent's pieces

if the king is currently not in check, then he doesn't need to move. so return empty.

for simplicity, assume that the king cannot take out opponent's pieces.

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Solution Stats

29 Solutions
8 Solvers

Last Solution submitted on May 01, 2025

Last 200 Solutions

Problem Comments

6 Comments

6 Comments

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Asif Newaz on 26 Dec 2019

william,
yes u're right.
my bad..i didn't see that pawn..there is a lot to look into i guess

Rafael S.T. Vieira on 9 Nov 2022

The problem should state that the king is black since Kd5 is not a valid movement for a white king in the first test. And shouldn't the possible moves for the king follow an order? Or else the function "isequal" will fail if the order of the movements does not match. Test #1 uses CW ordering, and Test#3 uses CCW ordering, for instance. And increasing and decreasing indexes also do not work.

Rafael S.T. Vieira on 9 Nov 2022

Test #10 is wrong. It should return an empty list since the King is not in check (& if he were, Kg5 would also be a valid movement). Tests #8 and #9 are inconsistent because both boards have black kings who are in check and cannot escape, but one returns [] and the other 'checkmate' (assuming the king cannot take other pieces).