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550s

Centuries: 5th century - 6th century - 7th century

Decades: 500s - 510s - 520s - 530s - 540s - 550s - 560s - 570s - 580s - 590s - 600s

Years: 550 551 552 553 554 555 556 557 558 559 560


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Composition chess

... might be given with the instruction that white is to move first, and checkmate black in two moves against any possible defence. There is a good deal of specialised jargon ...