Spaced Trainer
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The Spaced Trainer uses spaced repetition to help you review and remember positions from your repertoire more effectively. It selects positions and reintroduces them at carefully timed intervals, ensuring you practice them just before they fade from memory. This structured approach strengthens long-term recall and makes your training both efficient and sustainable.
This allows you to:
- + Reinforce key positions through scientifically timed review sessions
- + Maximize retention by revisiting moves just before they’re forgotten
- + Build strong, long-term recall of your entire repertoire through consistent daily practice
What is Spaced Memory Training?
Spaced memory training (or spaced repetition) is a proven learning technique based on the principle that information is more easily retained when reviewed at increasing intervals over time. Rather than repeating the same material frequently in a short period, the learner revisits it just as it’s about to be forgotten — a method shown to greatly enhance long-term retention.
In the context of chess, this means that instead of reviewing every move daily, the Spaced Trainer presents you with positions from your repertoire precisely when you need to refresh them. This approach minimizes wasted effort while ensuring that your understanding deepens with every review.
In our implementation, the Spaced Trainer keeps an internal score for every move in your repertoire. Each time you train against a move, a cumulative running score is updated — increasing when your answer is correct and decreasing when it’s incorrect. The algorithm also factors in move time (how quickly you respond) and the number of attempts taken, allowing it to dynamically adjust review intervals. This ensures that your strongest moves appear less frequently, while weaker or slower responses are prioritized until mastery is achieved.
Controls
The Controls section determines which positions are due or overdue for review based on the FSRS (Flexible Spaced Repetition System) algorithm. It analyses data from both the Position Trainer and Repertoire Trainer, calculating when each position should next be studied.
This allows you to:
- ◦ Filter by repertoire: Focus on specific repertoires or lines by using wild card filtering on repertoire names
- ◦ View which positions are due or overdue for review — ideal for daily training sessions
- ◦ Include today’s results: Toggle whether to include positions you trained today for full session resets or progress tracking
The Chessboard Card displays the selected position, allowing you to recall and play your intended repertoire move.
When in training mode, a Quit button is shown.
When the training position is completed, you’ll see Reset, Back, and Next buttons, as well as Flip Orientation. You can also navigate using the left and right arrow keys on your keyboard.
When you end the attempt, the Moves Card appears to let you review the correct line and compare it with your chosen move.
Moves Card
The Moves Card appears once you end the training for a position. It allows you to review the correct move sequence in detail, comparing your response against the intended repertoire line. As with other trainers, this card includes visualization tools, annotations, and evaluation options to aid deeper analysis.
- ◦ Review the correct continuation after each attempt
- ◦ Identify recurring mistakes across similar positions
- ◦ Reinforce corrected patterns immediately to strengthen recall
By following the timing set by the Spaced Trainer, you ensure your study sessions are both productive and scientifically optimized for memory retention. Over time, this builds deep, effortless recall across your entire repertoire.