{C : Type u_1} →
  [inst : CategoryTheory.Category.{v_1, u_1} C] →
    [inst_1 : CategoryTheory.Preadditive C] →
      [CategoryTheory.Balanced C] →
        (S : CategoryTheory.ShortComplex C) →
          S.Exact →
            (s : S.X₃ ⟶ S.X₂) →
              CategoryTheory.CategoryStruct.comp s S.g = CategoryTheory.CategoryStruct.id S.X₃ →
                CategoryTheory.Mono S.f → S.Splitting