In game 11 of the 1972 World Championship, Spassky as white moves his Knight back to its 14. Nb1
starting position. Apparently, this moved was received as 14. Nb1!!
. But to me, it seems as a simple attack on the invading black queen to flush her out of the zone.
What about this move makes it so interesting?
Shown below is after move 13. Kh1 Bd7
[FEN "r3kb1r/1p1b1p2/p1nppp1p/8/4PP2/qNN5/P1PQB1PP/R4R1K w - - 0 1"]