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from games
typical mating positions from real games
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KRvK
King and Rook versus Lone King
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KQvK
King and Queen versus Lone King
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2 vs 1
two chessmen versus a lone king
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2 vs 2
two chessmen versus two chessmen
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KRRvK
two rooks versus lone king
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KRNvK
rook and knight versus lone king
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KQQvK
two queens versus lone king
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KQRvK
queen and rook versus lone king
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KQBvK
queen and bishop versus lone king
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KQNvK
queen and knight versus lone king
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3 vs 1
three chessmen versus one
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Puzzle Rush
first only a few chessmen, then more and more
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Compositions
from Mate in 2 compositions
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Hardcore Set
from crazy compositions