Maestro n° 103 : Page 63 - Gr 60

XY-Chain Eclate Renforce

r3c8 -9- r1c9 +6+ r5c1 -1 => r3c1 ≠ 1. The candidates 6 in cells r15c2 used as strong link for the indirect link r1c9 +6+ r5c1