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Atomic puzzle tags

• 2x2
• antipin
• b-invasion
• b-sac
• bb
• bh6
• bishop
• bn
• bp
• break-structure
• buildup
• bypass
• cage-mate
• clamp
• colour-complex
• defense
• deflection
• discovered-check
• domination
• draw
• en-passant
• endgame
• exchange
• file-closure
• file-opening
• fork
• hook
• interference
• k-connect
• k-cut
• king
• knight
• mate
• material
• middlegame
• mining
• n
• n-epaulette
• n-invasion
• n-sac
• nail
• ng5
• nn
• octopus
• opening
• opposition
• pawn
• pawn-race
• pawnitisation
• perpetual
• pin
• positional
• q
• q-invasion
• q-sac
• qa4
• qa5
• qb3
• qh5
• queen
• queen-sac
• r-invasion
• r-sac
• race
• rb
• repetition
• ribbon
• rn
• rook
• sac
• seal
• skim
• stalemate
• swindle
• tempo
• tick-mate
• under-attack
• underpromotion
• unpinning
• weak-diagonal
• zugzwang