303 real-game puzzles in this collection
What is a double check?
A double check delivers check from two pieces at once — the moving piece and the unmasked piece behind it. Blocking or capturing cannot answer both, so the king must move, which makes double checks the engine of many forced mates.
How to spot it
Double checks grow out of discovered-check batteries where the moving piece also gives check. If the king has few flight squares, look for a mating net one move later.
What this set trains
These puzzles teach the most forcing move class in the game and how to convert king exposure into concrete mate lines.
Foundation: 38Developing: 70Challenging: 73Advanced: 122
advanced
Rating 2482
advantagediscoveredAttackdiscoveredCheck
advanced
Rating 2489
advantagediscoveredCheckdoubleCheck
advanced
Rating 2493
advantagediscoveredCheckdoubleCheck
advanced
Rating 2498
advantageattractiondiscoveredAttack
advanced
Rating 2503
attractioncollinearMovedoubleCheck
advanced
Rating 2510
crushingdoubleCheckendgame
advanced
Rating 2512
crushingdiscoveredCheckdoubleCheck
advanced
Rating 2517
attractioncrushingdiscoveredCheck
advanced
Rating 2555
advantageattractiondiscoveredCheck
advanced
Rating 2558
crushingdiscoveredCheckdoubleCheck
advanced
Rating 2569
crushingdeflectiondiscoveredCheck
advanced
Rating 2573
crushingdiscoveredCheckdoubleCheck
advanced
Rating 2588
crushingdiscoveredCheckdoubleCheck
advanced
Rating 2601
advantagedoubleCheckintermezzo
advanced
Rating 2606
advantagediscoveredCheckdoubleCheck
advanced
Rating 2608
advantagedeflectiondiscoveredCheck
advanced
Rating 2612
crushingdoubleCheckendgame
advanced
Rating 2636
advantagediscoveredCheckdoubleCheck
advanced
Rating 2639
advancedPawnadvantageattraction
advanced
Rating 2649
advantagedefensiveMovediscoveredCheck
advanced
Rating 2652
advantagediscoveredCheckdoubleCheck
advanced
Rating 2663
advantageattractiondiscoveredCheck
advanced
Rating 2680
advantageattractiondeflection
advanced
Rating 2690
advancedPawnadvantageattraction
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