The won the race to the sea OTL. Basically the Germans were still attempting to win in one knock out stroke by turning the Allied flank. The Allies had the same idea, but "won" in the sense that they defeated all German attempts to "race to the sea". Now if you mean they successfully turn the German flank, that is ASB. After the massive casualties from the previous 1.5 months, the French and British were incapable of turning the German flank anymore than the Germans were able to turn theirs. A POD would have to do with fewer French casualties and greater German during the Marne and before. But if that were to happen, than the Race to the Sea might not even happen as we know it, as the French would just be able to turn the German flank at the Marne.
If by ASB intervention that the Allies did do it, than the Germans just probably lost 1 or more armies and likely their nerve. I could see a reasonable peace offer from the Germans, but maybe not. If not, then the Germans are in an even worse place for the coming winter battles and peace will most likely come in 1915, as the extra casualties taken by the Germans means that the French offensives preclude Germans force transfers to the East without a large withdrawal to the shorter lines, close to Germany. This would likely once again mean peace in 1915, as the Austrians sue for peace after another belugeoning by the Russians. With their fall comes the Germans shortly thereafter. Much earlier Allied victory and a much better off Europe, though the same could be said if the Germans won early too.