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 2277
advancedPawnadvantageattackingF2F7
advanced
Rating 2281
attractiondoubleChecklong
advanced
Rating 2285
attractiondiscoveredCheckdoubleCheck
advanced
Rating 2290
advantagediscoveredCheckdoubleCheck
advanced
Rating 2295
attractiondiscoveredCheckdoubleCheck
advanced
Rating 2299
discoveredCheckdoubleCheckkingsideAttack
advanced
Rating 2306
crushingdefensiveMovediscoveredCheck
advanced
Rating 2306
advantageattackingF2F7discoveredCheck
advanced
Rating 2316
advancedPawnattractioncrushing
advanced
Rating 2322
attractiondiscoveredCheckdoubleCheck
advanced
Rating 2322
discoveredCheckdoubleCheckkingsideAttack
advanced
Rating 2325
advantageclearancediscoveredCheck
advanced
Rating 2325
advantageattractiondiscoveredAttack
advanced
Rating 2345
crushingdiscoveredCheckdoubleCheck
advanced
Rating 2359
advancedPawnattractioncrushing
advanced
Rating 2362
advantagedefensiveMovediscoveredCheck
advanced
Rating 2364
advantagediscoveredCheckdoubleCheck
advanced
Rating 2420
crushingdiscoveredCheckdoubleCheck
advanced
Rating 2429
advantagediscoveredCheckdoubleCheck
advanced
Rating 2432
advantagediscoveredCheckdoubleCheck
advanced
Rating 2449
attractioncrushingdiscoveredCheck
advanced
Rating 2468
advantagedeflectiondiscoveredAttack
advanced
Rating 2475
crushingdiscoveredCheckdoubleCheck
advanced
Rating 2482
advancedPawnattractioncrushing
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