Ha ha ha.
Ukraine, Turkey and the UN kept on sending the wheat cargo ships and Putin realised sinking them would have been a disaster for him. Russia's support in places like Africa and maybe as far afield as China would have fallen apart.
So his bluff was called. He no longer controls the wheat traffic from Ukraine. The Russian-made wheat famine is history.
Erdogan has helped Putin save face by not pointing out his humiliation. But this is a poke in the eye, all the same. Another strategic failure. He can't weaponise wheat. Another hostage escapes.
Excellent news.