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The name of this pattern was invented by Polish master Dawid Janowski, who called doubled rooks on the 7th rank 'pigs.' For this type of mate, the White rooks on the seventh rank can be positioned on any two files from a to h, and although Black pawns are usually present, they are not necessary for affecting the mate.

Примеры для решения

Example 1

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Example 2

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Example 3

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