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Shabbos Chol Hamoed:
Shacharis: The Shabbos Chol Hamoed Davening follows the same dialect of prayer as a regular Shabbos, with exception to that Ya’aleh Veyavo is added in the Shemoneh Esrei.
Musaf: For Musaf one prays the same dialect prayed by Musaf of Yom Tov, although reciting the Shabbos additions. If one forgot to mention the Shabbos sacrifices in Musaf then if one said “Kimo Shekasuv Besorasecha” he has fulfills his obligation. The same applies whenever one forgets to mention a particular Karban.
Haftorah: Both the Haftorah of Shabbos Chol Hamoed Pesach and Sukkos discuss the times of the redemption. On Pesach the Haftorah discusses the resurrection, being that the resurrection will take place in Nissan. On Sukkos the Haftorah discusses the battle of Gog and Magog, being that in Tishrei there will be the war of Gog and Magog. The last blessing said after the Haftorah on Pesach concludes with only “Mikadesh Hashabbos” being that Chol Hamoed Pesach is not considered a separate Yom Tov. On Sukkos, however, it ends with “Mikadesh Hashabbos Yisrael Vehazmanim” being that each day is a separate Yom Tov.
Is Vayiten Lecha recited on Motzei Shabbos Chol Hamoed?
 Admur 490:15
 Admur 490:16
 Admur 490:17
 Otzer Minhagei Chabad p. 210 as is evident from the fact that it is omitted by Admur in the Siddur.
 P”M 295 M”Z 3; Beir Heiytiv 491:1
 Elya Raba 491:2; Aruch Hashulchan 295:3 His reasoning is because Chol Hamoed is forbidden in Melacha, and it is hence a belittling of Chol Hamoed to bless the weeks Melacha.
 Hayom Yom 19th Nissan