çars

/ tʃars /

Cases

SingularPluralWhen to use it
nominative çars the horse race çarsla the horse races the plain dictionary form — the doer of the sentence
genitive çarsnı the horse race's çarslanı the horse races' the owner — whose it is
accusative çarsnı the horse race (as the object) çarslanı the horse races (as the object) a specific, known object — whom or what
dative çarsha to the horse race çarslağa to the horse races direction or recipient — to where, to whom
locative çarsda at / in the horse race çarslada at / in the horse races where it is; also having — mende bar, "I have it"
ablative çarsdan from the horse race çarsladan from the horse races where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
my çarsım my horse race çarslarım my horse races
your çarsıŋ your horse race çarslarıŋ your horse races
his / her çarsı his / her horse race çarsları his / her horse races
our çarsıbız our horse race çarslarıbız our horse races
you all's çarsığız you all's horse race çarslarığız you all's horse races
their çarsları their horse race çarsları their horse races

The overlap in the last rows is real, not a mistake: çarsları can mean "his / her horse races", "their horse race", or "their horse races" — context decides.