11 lines
291 B
Python
11 lines
291 B
Python
>>> import re
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>>> pieces = 'KQRRBBNN'
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>>> bish = re.compile(r'B(|..|....|......)B').search
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>>> king = re.compile(r'R.*K.*R').search
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>>> starts3 = {p for p in (''.join(q) for q in permutations(pieces))
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if bish(p) and king(p)}
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>>> len(starts3)
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960
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>>> starts3.pop()
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'QRNKBNRB'
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>>>
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