A General Logic for Sudoku Siamese Loops, Hit from Both Sides |
Points. Double and multiple loops can be connected many
ways producing rank 0, rank 1, or rank 2 logic. However, eliminations are determined
only by the basic rank rules. Siamese Loops, Hit
from Both Sides This piece of logic would have been two independent
continuous nice loops, one with row and column sets on the left, and the
other with box and cell sets on the right. However, they are joined by a
single linkset in row 5, linkset r52, which makes the entire structure a
uniform rank 1. The unfortunate candidate sits at the crossing point of two
linksets, one from each loop, which causes its elimination. |