The Implementation Plan.

• Keep all the statistics in a scans * boards matrix.
• Find the optimal scan by doing a column-wise summation of the solved boards.
• Maintain the current state, by subtracting the iterations of the current scan from the non-solved boards.
• Solved boards will be removed from the matrix.
• Keep track of the total iterations by summing the iterations of all the solved boards, plus the quota times the number of non-solved ones.