L example 2x2 hole in depth
J-piece Disconnected left side results in less aggregate placements due to having four 2-high edges No vertical Z placement. Z on the right will open up options, but an S can cause instability as shown below: Five +1 adjacent height difference (AHD) patterns, a staircase/bumpy pattern that reduces options No vertical Z placement. Two Zs cause a nasty staircase pattern and do not allow placement for a third Z. Sustains S and Z combinations No staircase pattern Three 2-high edges instead of four L-piece Although not the ideal surface, a second L in both options result in an identical outcome that supports S- and Z-pieces as well as provides flatness for O- and J-pieces S- and Z-pieces The middle empty 2x2 cannot support S and Z combinations for long. ` Supports multiple S- and Z-pieces, and future ones afterward. T-piece Both options result in challenging follow-ups when T comes. Conclusion The main advantage of putting the 2x2 empty space on the side opposed to