LLD - Design — Chess Game
Which code snippet correctly checks if an en passant move is possible in a chess game for an opponent pawn landing to the right?
Which code snippet correctly checks if an en passant move is possible in a chess game for an opponent pawn landing to the right?
easy📝 Conceptual Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Understand en passant position logic
En passant capture happens when an opponent's pawn moves two squares forward and lands beside your pawn horizontally.Step 2: Identify correct position offset
The opponent pawn must be exactly one square horizontally adjacent (x+1 or x-1), so position + (1, 0) is correct for right side.Final Answer:
if pawn.just_moved_two_squares and opponent_pawn.position == pawn.position + (1, 0): allow_en_passant() -> Option AQuick Check:
En passant horizontal check = if pawn.just_moved_two_squares and opponent_pawn.position == pawn.position + (1, 0): allow_en_passant() [OK]
Quick Trick: En passant checks horizontal adjacency after two-step pawn move [OK]
Common Mistakes:
- Checking vertical instead of horizontal adjacency
- Using wrong coordinate offsets
- Ignoring the two-square move condition
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