Maestro n° 103 : Page 75 - Gr 72

XY-Chain Eclate Renforce

r3c9 -9- r3c7 -4- r3c3 +2+ r9c4 -7- r9c5 -3- r9c6 -5 => r9c9 ≠ 5. The candidates 2 in cells r39c1 used as strong link for the indirect link r3c3 +2+ r9c4