Display Legal Move Indicators

[RJPalmer]

Description

Show all legal destinations after selecting a movable piece, distinguishing between regular moves and capture moves.

User Story

As a player, I want to see all possible moves for my selected piece so I can make informed decisions about my next move.

Acceptance Criteria

• Valid regular moves display green indicators (or similar positive color)
• Capture moves display a distinct visual indicator (different color or pattern)
• Indicators are clearly distinguishable from the board and pieces
• Indicators disappear after the move is completed
• Indicators disappear if the selection is canceled
• Indicators appear within 100ms of piece selection

Technical Notes

• Consider using semi-transparent overlays or borders on destination squares
• Different colors/patterns should be accessible to colorblind players
• Ensure indicators don't interfere with hover states
• Plan for fast updates as board state changes

Suggested Implementation Tasks

• Implement move indicator rendering system
• Add regular move visual indicator
• Add capture move visual indicator (distinct from regular moves)
• Implement indicator clearing logic
• Test visibility and clarity
• Verify accessibility (not color-dependent alone)

Priority

High

Labels

UI/UX, enhancement

Estimated Effort

Medium