Given this simplified move validation function for a king:

medium📝 Analysis Q13 of Q15

LLD - Design — Chess Game

def is_valid_king_move(start, end):
    row_diff = abs(start[0] - end[0])
    col_diff = abs(start[1] - end[1])
    return (row_diff <= 1 and col_diff <= 1) and (row_diff + col_diff != 0)

What will is_valid_king_move((4,4), (5,5)) return?

ATrue

BFalse

CNone

DError

Step-by-Step Solution

Solution:

Step 1: Calculate row and column differences
row_diff = |4 - 5| = 1, col_diff = |4 - 5| = 1
Step 2: Evaluate conditions
row_diff <= 1 and col_diff <= 1 is True; row_diff + col_diff != 0 is True (1+1=2)
Final Answer:
True -> Option A
Quick Check:
King moves one step any direction = True [OK]

Quick Trick: King moves one square in any direction, including diagonals [OK]

Common Mistakes:

MISTAKES

Ignoring diagonal moves for king
Mistaking zero move as valid
Confusing row and column differences

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Given this simplified move validation function for a king:

Step 1: Calculate row and column differences

Step 2: Evaluate conditions

Final Answer:

Quick Check:

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