  In these notes we study integrable structures of conformal field theory with
$\textrm{BCD}$ symmetry. We realise these integrable structures as affine
Yangian $\mathfrak{gl}(1)$ "spin chains" with boundaries. We provide three
solutions of Sklyanin $\textrm{KRKR}$ equation compatible with affine Yangian
$R$-matrix and derive Bethe ansatz equations for the spectrum.
