с ходу

• схо́ду (sxódu) — similarly common in this sense but erroneous; actually the dative singular of сход (sxod)

Univerbation of с (s, “off (of)”) +‎ хо́ду (xódu, “course, motion”, in the partitive case).

• IPA^(key): [ˈs‿xodʊ]

с хо́ду • (s xódu)

1. (about something being successfully done) immediately, instantly, right away, on the spot, off the bat, off the top, off the cuff, on the first attempt

   Synonym: сра́зу (srázu)

   Я с хо́ду могу́ во́семь вспо́мнить. ― Ja s xódu mogú vósemʹ vspómnitʹ. ― I can think of eight off the bat.

2. on the way, along the way, in stride, on the move, on the go (in the course of moving somewhere)

   Synonyms: на ходу́ (na xodú), в движе́нии (v dvižénii)

   Проти́вник пыта́лся захвати́ть го́род с хо́ду. ― Protívnik pytálsja zaxvatítʹ górod s xódu. ― The enemy attempted to seize the city on the move.