Why is maintaining a proper sideboard important in a constructed format?

Maintaining a proper sideboard is important in a constructed format because it allows players to adjust their strategy between games in a match. A sideboard typically consists of cards that a player has chosen not to include in their main deck but that can be brought in to adapt to specific matchups or to enhance the deck's performance against certain opponents. This flexibility is critical because it enables players to counteract their opponent's strategies, strengthen their own weaknesses, and respond dynamically to the evolving game state.

For instance, if a player knows they will face an opponent using a particular strategy that they are weak against, they can sideboard in cards that are specifically effective against that strategy. This can significantly tilt the odds in the match in their favor, making sideboarding a crucial part of competitive play. Overall, the strategic adjustments made possible by a well-maintained sideboard can be decisive in achieving victory in constructed formats.