Maestro n° 103 : Page 85 - Gr 82
r8c3 -9- r8c5 =9= r7c5 -9-7- r7c5 =7= r2c5 -7-4- r2c5 =4= r2c1 -4-6- r2c1 =6= r4c1 -6-9- r4c1 =9= r4c3 -9- r8c3 => r8c3 ≠ 9