XY-WING, number 684 in r2c1, r3c3, r2c4
* deleted 4 from r3c4 , r3c5 ,
X-WING, number 7 in rows 27 columns 69
* deleted 7 from r3c6 , r3c9 ,
XY CHAIN, 6 , or in r2c1 , or in r2c6
* If r2c6 = 8 then
* r2c4 = 4
* r8c4 = 2
* r8c6 = 6
Hanno risolto:
Arizona1952
Bely
Bruno61
Iaiacricri
Alternative:
SIMPLE COLOR
Elimino il 7 da r3c6 e r3c9
di BRUNO