  The Knight Move Conjecture claims that the Khovanov homology of any knot
decomposes as direct sums of some "knight move" pairs and a single "pawn move"
pair. This is true for instance whenever the Lee spectral sequence from
Khovanov homology to Q^2 converges on the second page, as it does for all
alternating knots and knots with unknotting number at most 2. We present a
counterexample to the Knight Move Conjecture. For this knot, the Lee spectral
sequence admits a nontrivial differential of bidegree (1,8).
