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 2039
attractioncrushingdiscoveredCheck
advanced
Rating 2043
doubleCheckkingsideAttacklong
advanced
Rating 2052
discoveredCheckdoubleCheckendgame
advanced
Rating 2053
advantagediscoveredCheckdoubleCheck
advanced
Rating 2062
discoveredCheckdoubleChecklong
advanced
Rating 2064
advancedPawnadvantageattraction
advanced
Rating 2064
attractiondiscoveredCheckdoubleCheck
advanced
Rating 2072
advantagediscoveredCheckdoubleCheck
advanced
Rating 2075
discoveredCheckdoubleCheckmate
advanced
Rating 2078
advancedPawncrushingdiscoveredCheck
advanced
Rating 2079
advantageattractiondiscoveredCheck
advanced
Rating 2082
advantagediscoveredAttackdiscoveredCheck
advanced
Rating 2082
attractiondiscoveredCheckdoubleCheck
advanced
Rating 2083
attractiondiscoveredCheckdoubleCheck
advanced
Rating 2097
advantageattractiondiscoveredCheck
advanced
Rating 2101
attractiondiscoveredCheckdoubleCheck
advanced
Rating 2106
discoveredCheckdoubleCheckendgame
advanced
Rating 2108
discoveredCheckdoubleCheckendgame
advanced
Rating 2117
advantagediscoveredCheckdoubleCheck
advanced
Rating 2126
advancedPawnadvantageattraction
advanced
Rating 2130
discoveredAttackdiscoveredCheckdoubleCheck
advanced
Rating 2135
discoveredCheckdoubleCheckmate
advanced
Rating 2140
attractiondiscoveredCheckdoubleCheck
advanced
Rating 2141
attractiondiscoveredCheckdoubleCheck
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