Intro
This is a collection of over 700 tactics exercises from the games of the 2026 Chess Olympiad Open section, curated and hand annotated. It includes combinations played by the participants as well as missed opportunities.
What is included
The exercises have been split up into 5 groups based on difficulty ratings of 1-5, with 1 being the easiest. We've refrained from using Elo estimates for these exercises and suggest that you start with the easier ones to see where you find the exercises challenging but solvable.
There is also a set containing all of the exercises for those who like a mix of easy and hard problems.
Most of the exercises are forcing middlegame combinations, but there are some exercises with less forcing maneuvers that set up dangerous attacks for which all reasonable paths forward can't be given. There is also a smattering of endgames and some saves of worse positions into a draw.
How to use the exercises
This is most appropriate for intermediate to advanced players wanting to improve their tactical vision and attacking skills. The easier exercises can be solved quickly, but the more advanced problems (levels 4 and 5) become heavier on calculation and require high accuracy and imagination to the very end. These are better suited for study sessions with less exercises and more time on each.
Beginners: it's recommended to stick with training the Level 1 and 2 exercises, and to treat the Level 3+ ones as studies to be worked on 1 or 2 at a time by playing over the solution moves on a real chessboard.
How to run a training session
Go to the Training panel by clicking on the Training panel header and select a training set from the TRAINING SETS list.
Select "Prepare Exercises" to load the exercises.
If you want to, change the options for the session. See Options below.
Select the green Play button to be quizzed on the entire training set.
You can run only part of a training set by selecting the "Games in this Training Set" strip and picking Play on one of the games. Only games from that point forward will be quizzed.
Each exercise will present a position - you must make the moves on the board and the app will make the opponent moves.
If there are multiple test variations in an exercise, the app will rewind to branching points to test them.
On completing an exercise, the full move tree is revealed. Check extra analysis from it by clicking on the notation. Turn off the auto-advance option to be able to see them.
The training session can be stopped at any time using the red Stop button.
Once completed or stopped, a session can be re-run or continued using the green Re-run or Continue buttons.
Options
Randomize exercise order - exercises positions will be presented in a random order
Retry wrong moves - you will be able to try a move again if your move wasn't the solution
Auto-advance to next exercise - on completing an exercise, go to the next immediately
Hide arrows and highlights during quiz - hide arrows and square highlight annotations until exercise is completed
Annotations and Commentary
The move tree shown during training mode is in Algebraic Notation. Many are annotated with standard chess annotation symbols to indicate who is winning or whether a move was a mistake or strong. Some positions have arrows and square highlighting to visually explain key maneuvers and squares. The exercises always start from a position in a real game from the event, but often deviate or go further than the game did. The actual final move of the game is always marked with a result code: 1-0 = White won, 0-1 = Black won, 1/2-1/2 = draw.
You're encouraged to check the extra analysis as well as how the game went for exercises that you found interesting.
Feedback
We'd love to hear from you! Please send any questions, corrections or suggestions to contact@chessmaven.com.
© 2026 Chessmaven. Individual exercises may be quoted or shared with attribution to Chessmaven and a link to this workspace (link). The exercise set as a whole may not be copied, redistributed, or extracted by automated means.