Partial view of complex cations interacting with BF4− anions and H2O molecules to form chains extending along the [001] direction in [Pt(L3)(μ-1,3-MeCONH)PtCl(MeCN)](BF4)2·H2O. H-atoms not involved in H-interactions were omitted for clarity. N2H···OW 2.04(4), N2···OW 2.910(6) Å, N2-H···OW 174(4)°, F8···HW2 2.02(5), OW···F8 2.775(7) Å, OW-HW2···F8 145(4)°, F7···H11B 2.62, C11···F7 3.43(7) Å, C11-H11B···F7 141°, F8···H14A 2.48, C14···F8 3.283(5) Å, C14-H14A···F8 141°, F5···HW1 2.45(6), OW···F5 2.970(6) Å, OW-HW1···F5 119(6)°, F4···H16Bi 2.59, C16i···F4 3.52(7) Å, C16i-H16Bi···F4 161°. Symmetry code: i = x, y, 1 + z.