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The problem indicates that the definition of the queens seeing each other diagnonally is "lie in a line inclined 45 degrees or 135 degrees to the base of board." then the example of an invalid solution is:
7
1 3 5 7 2 4 6
This is not right. The sequence "1 3 5 7" represent a 26.565 degree line, not a 45 degree line. This is because the slope is 2 columns to each 1 row. A 45 degree line would have a slope of 1 column for each row, or a sequence like:
7
1 2 3 4 7 6 5
Please confirm that the scoring engine checks strictly for a 45 degree line, or does it check for three queens sequenced with the same slope line? If it shecks for the same slope line, does that imply the following sequence is also wrong:
Spies, Revised
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The problem indicates that the definition of the queens seeing each other diagnonally is "lie in a line inclined 45 degrees or 135 degrees to the base of board." then the example of an invalid solution is:
7
1 3 5 7 2 4 6
This is not right. The sequence "1 3 5 7" represent a 26.565 degree line, not a 45 degree line. This is because the slope is 2 columns to each 1 row. A 45 degree line would have a slope of 1 column for each row, or a sequence like:
7
1 2 3 4 7 6 5
Please confirm that the scoring engine checks strictly for a 45 degree line, or does it check for three queens sequenced with the same slope line? If it shecks for the same slope line, does that imply the following sequence is also wrong:
7
1 4 7 2 5 3 6
??