Cross-hatching is similar to squeezing but here, we will be using two or more solved numbers that are connected in different directions from our target box.The graphic above shows an example of cross-hatching. The solved 7s from box G eliminate the possibility of 7 from column 2 while the solved 7 from block C eliminate the possibility of 7 from row 1. The only cell left in block A is R3C1 and hence must be 7.
Could you determine where the 7s are in blocks E and I using cross-hatching?
The single spotted using squeezing or cross hatching is also known as hidden single.