Mostly middlegames · usually a rook move · found over the board
28% of the time.
Now study them together
The same four positions, side by side, each with the engine's move and what follows.
There is no commentary on purpose. The pattern is easier to absorb than to describe,
which is the whole reason it has no name. Step through each line, then look at the
starting positions again.
Redo the try round
The numbers behind this pattern
259 positions, mostly middlegame. 82% of the moves are quiet (neither capture nor check) and the piece moved is most often a rook. In the engine's representation this group is closest to exposedKing (0.53), and only weakly. Real players at the board found these moves 27.8% of the time, losing an average of 313 centipawns by choosing otherwise.
259 positions found
27.8% found over the board
82% quiet moves
−313cp average human error
closest named motifs:
exposedKing 0.53 · pin 0.30 · deflection 0.29