I have my doubts as to how effective this would be. By 1943, the Germans had lost their superiority in operations. They were being routinely deceived by maskirovka, and the Red Army had greatly increased its ability to command their troops thanks to Lend Lease radio and communications equipment. So much depends on individual decisions in the next 2 years that one can't predict with much accuracy what exactly will happen. But for the sake of argument, let's say the moves buy the Germans an extra 6 months. I think people could convincingly argue for no substantial delay to up to a year.
Historically, these are the dates when the Red Army entered Central European countries.
Czechoslovakia (January 1945, Prague taken May 1945). Pushed back to June 1945 with Prague falling in November 1945.
Hungary (September 1944, but Budapest not taken until February 1945). Pushed back to March 1945 with Budapest falling August 1945.
Poland (July 1944, Warsaw taken January 1945, Oder reached February 1945). Pushed back to January 1945, Warsaw taken in June 1945, Oder reached September 1945.
Romania (September 1944 - Romania defect to the Allies, Red Army occupies). Pushed back to March 1945.
Bulgaria (September 1944 - Bulgaria defects to the Allies, Red Army occupies). Pushed back to March 1945.
If everything goes the same for the Western Allies, they will end 1944 the same way they did IOTL. 1945 will be different because the Germans have more strategic mobility. The real difference will come to the actions of the Axis satellites. They desperately want out of the war, but don't want Red Army troops over them. They will attempt to hold out as long as possible until the Western Allies arrive, and won't defect early if possible. In addition, the Polish government in exile won't launch the Warsaw Uprising until Soviet troops are near Warsaw.
The Western Allies will likely not resume the offensive until Spring 1945. The Soviets will keep pushing since they are use to winter warfare and aren't facing as formidable natural barriers like the Rhine or Appenines.
Yalta Conference still happens, although perhaps not at Yalta, but at some other resort town on the Black Sea. Probably everything agreed IOTL is still agreed to. What will matter is the where everyone's troops stop.
So the Soviets begin entering Poland in January 1945 with a strong winter offensive. In March 1945, the Western Allies cross the Rhine at the same time the Red Army reaches Hungary and Romania. Both continue to fight, but the governments of Hungary, Romania, and Bulgaria indicate they are willing to surrender provided the Red Army does not occupy them - they want to surrender to the Western Allies. The West likely tells them that they have to surrender to whoever is there, so for now they keep fighting, hoping the strategic situation changes.
Allied offensive in Italy begins in April 1945. The US reaches the Elbe in May 1945. With Hitler still alive and Berlin being defended, fighting continues to be hard. Looking to avoid as much US casualties as possible (knowing that Japan must still be attacked), Eisenhower likely only cautiously advances towards Berlin, stopping once defenses become hard. Instead, he hopes to link up with the Allied armies in Italy and meet up with the Soviets on the Danube for a combined offensive to take Berlin.
In May 1945, Western Allied forces push into Czechoslovakia, Austria, and northern Yugoslavia. By June 1945, American forces reach Prague and Budapest. Hungary surrenders with the western half occupied by the American and eastern half by the Red Army.
Depending on how effective Romania and Bulgaria have fought, they are either all occupied now, or at least Romania taken. In any case, once Hungary surrenders, both of them likely surrender as well. Most likely the Red Army still occupies them. However, if the British are able to divert a small force into Greece, it's possible the British can save Bulgaria. Tito is still in effective control of Yugoslavia.
Around July 1945, the Red Army likely reaches Warsaw, and the Polish government in exile authorizes a Rising that liberates the city just before the Red Army arrives, the Polish government flies into the city. Maybe the Americans even reach Krakow. The Red Army moves across Poland.
By August 1945, a combined Allied offensive is planned to take Berlin. President Truman informs Stalin of the atomic bomb, and its tactical use is planned to take Berlin. A final announcement is made asking for Germany's surrender. Hitler refuses. The bomb is dropped somewhere (likely not on Berlin itself so that some authority can surrender the entire country. The bomb vaporizes a hole in the German line, allowing Allied or Soviet troops to pour in. Many of those poor troops will die horribly from raditation poisoning several years later. Given the show of the atomic bomb, various Nazis decide to take control of the government and "negotiate" a surrender. Hitler commits suicide. Goering and Himmler are unable to negotiate anything, but agree to surrender since everything is hopeless.
So what is the strategic situation postwar, and how does it effect the Cold War?
The West is not really in a good position. The Central European countries they liberated are still separated from the Western Democracies. Yugoslavia is Communist under Tito. A Communist backed government is in place in Romania and likely Bulgaria. Hungary, possibly, is allowed to return to its internal affairs, but with a very heavy Finlandized policy. The Czechoslovakian government in exile returns to power as it did IOTL. Just as in IOTL, it sees the Soviet Union as its only real guarantor of its independence. It is the only country in central Europe where Communist party enjoys substantial popularity in democratic elections, and Communists are part of the coalition government. Germany and Austria are divided into occupation zones as in our timeline.
American troops likely leave Czecoslovakia, Hungary, and any other area they are in as soon as possible. The Soviet Union likely withdraws from Czechoslovakia and Hungary as well, happy that their foreign policies like Finland has to be pro-Soviet even if they are not Communist internally.
Soviet troops remain in Romania for the time being, until official peace treaty with Romania is signed. Depending on how Bulgaria ended the war, a similar situation may exist. Soviet manipulation of the governments of those countries will draw increasing protests from the West, but it won't come to a head for a long time. Stalin likely controls the Balkans.
The headache is Poland. Red Army troops are all over the place. Furthermore, the Soviets need access in Poland to keep supply routes to its occupation forces in Germany. They cannot withdraw there. Like Czechoslovakia, the government in exile has returned. Unlike Czechoslovakia, the Poles are not as friendly to the Soviets. Much of the initial postwar politics between the Western Allies and Soviet Union are what to do about Poland. Frankly, I can't foresee what will happen. Many things are potentially plausible.
Big changes in the Pacific Theatre too, as the Japanese know of the atomic bombing in Germany. Red Army won't attack Manchuria until December 1945 at earliest. Nationalist Chinese, now with a large force of well supplied troops liberate most of China south of the Yangtze itself in August/September 1945. Japan may surrender before the Red Army can even attack them.