Blindfold Simul
A blindfold simul is a simultaneous exhibition in which one player faces multiple opponents without seeing the boards, tracking every position entirely in memory and announcing moves verbally or by notation.
- Category
- Historical
- Also in
- Notation
- Difficulty
- Intermediate
- Also known as
- Blindfold simultaneous, Blindfold sim, Blindfold simultaneous exhibition, Simultaneous blindfold display, Memory simul
Blindfold simul is a simultaneous exhibition in which one player faces several opponents without seeing any of the boards. The exhibitor keeps every position in memory and delivers moves by speaking the notation aloud or calling out the square names.
The format combines two demanding skills: blindfold play and simultaneous play. Each opponent moves on their own board in turn. After hearing the move, the blindfold player must update that specific mental position, choose a reply, and announce it before the next board is presented. The sequence repeats until all games finish.
Because the player cannot glance at the boards to refresh memory, accuracy depends entirely on reliable visualization and disciplined move tracking. Even strong players often lose games to blunders that would never occur over the board. The mental load grows quickly with the number of boards; most blindfold simuls are therefore limited to fewer opponents than a sighted simul.
Club players sometimes use smaller blindfold simuls (three to five boards) as training. The exercise sharpens calculation depth and forces clearer mental images of pawn structures and piece coordination. It also reveals gaps in opening knowledge and endgame technique that visual aids might otherwise mask.
Frequently asked questions
- How does a blindfold simul work?
- One player faces several opponents without seeing the boards and must track every position in memory, updating each one after hearing an opponent's move before announcing a reply by notation.
- How many boards are typical in a blindfold simul?
- The number stays far lower than in a sighted simul because the mental load grows quickly, with most exhibitions limited to well under ten boards.
- Why do strong players still blunder in blindfold simuls?
- Without any visual reference to refresh memory, visualization errors and tracking slips occur that would rarely happen with boards in view.
- Are blindfold simuls used for training?
- Club players often try small versions with three to five boards to sharpen calculation depth and build clearer mental images of pawn structures and piece coordination.
About the reviewer
Ben's been in love with chess since he was seven years old, when his grandfather taught him the Sicilian Defense on a well-worn board that had traveled through three generations of family game nights.