1/17/12 X-Panel and X-Chains X-chain toxic sets and removals with the X-panel.
1/24/12 Special X-chains Needless searching for special X-chains promoted in Sudoku literature.
2/06/12 Alternating X-Loops AIC properties . Toxic set and victim of the almost nice loop. Confirming ANL. Nice loop removals.
2/14/12 Slink X-loops Even sided loops are nice, but ambiguous, but resolved by coloring. Mixing in winks.
2/21/12 Guardians Confirmations avoiding impossible slink loops, removals are nice loop removals
2/28/12 Group Therapy Grouping and grouped X-chains. Also appy to AIC.