Question:
Do you say harachaman hu yanchilaynu yom shekulo tov on chol hamoed in bentching? or just on yomtov itself? Source, please?
Answer:
The Achronim discuss your question and it depends if we term Chol Hamoed a "Yom Tov" or not. The Magen Avrohom O:CH 490-1, Chok Yackov ibid-4, and M:B ibid-5 say that we don't call it a Yom Tov therefore we don't say that harachaman on Chol Hamoed. However others say that it is said. See sources.
Sources:
Chochmas Shlomo 664-1, Rashash Succah 27a, Erech Hashulchan 198-2, Bais Meir O:CH 490-3, Kaf Hachayim 490-14, say that it is said on chol hamoed, see Shalmei Todah (Succos) 81.Taz O:CH 668-1 says that it isn't considered a Yom Tov.