Maestro n° 103 : Page 81 - Gr 78
r3c9 =2=6= r3c9 -6- r2c7 =6= r2c5 -6-7- r2c5 =7= r5c5 -7- r5c7 =7=5= r5c7 -5- r6c8 =5= r6c1 -5-9- r6c1 =9= r9c1 -9-2- r9c1 =2= r7c3 -2- r7c9 =2=6= r7c9 => r7c9 ≠ 2 and r3c9 ≠ 6