Sukaku STUVWXYZ-Wing

The eight cells A4, B4, C4, E4, F4, H4, I4 and G5 form a STUVWXYZ-Wing.

The seven cells A4, B4, C4, E4, F4, H4 and I4 are an Almost Locked Set (ALS) that is linked to the bivalue cell G5 through the value 9, so if the value 3 was eliminated from all eight Wing cells then the remaining value 3 of G5 leaves just six values to fill the seven ALS cells, which is invalid; so 9 is "locked into" these eight Wing cells, hence 3 can be removed from cells which see all 3's in the Wing.

Therefore we can remove A5-3, B5-3, C5-3.