these ghosts are ridiculously hard to avoid... nice!!!
this solution clears the board (yet it scores worse than a solution that leaves one dot on the board...)
Scoring revised. Did not think possible to clear.
Remove the polynomials that have positive real elements of their roots.
Project Euler: Problem 10, Sum of Primes
Column norms of a matrix
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Spot the outlier
Rubik's Cube: 30 Moves or Less: Minimum Avg Time
Maximize Non-Co-Planar Points in an N-Cube
Find: Faster Alternatives for Large Sorted/Unique Vectors
GJam: 2013 China Event: Name Sorting
Genome Sequence 004: Long 3rd Generation Segment Correction
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