June 1, 2011 SandRidge Capital, L.P.

Exhibit 10.1(b)

June 1, 2011

XxxxXxxxx Capital, L.P.

0000 Xxxx Xxx Xxxx., Xxxxx 000

Houston, Texas 77056

Attention: Xx. Xxxxxx X. Xxxx

Re: Management Agreement Renewals

Dear Xx. Xxxx:

We are writing with respect to your management agreements concerning the commodity pools to which reference is made below (the “Management Agreements”). We are extending the term of the Management Agreements through June 30, 2012 and all other provisions of the Management Agreements will remain unchanged.

• Bristol Energy Fund L.P.

• CMF XxxxXxxxx Master Fund L.P.

• Diversified 2000 Futures Fund L.P.

• Tactical Diversified Futures fund L.P.

• Diversified Multi-Advisor Futures Fund L.P.

• Diversified Multi-Advisor Futures Fund X.X. XX

Please acknowledge receipt of this modification by signing one copy of this letter and returning it to the attention of Xx. Xxxxxxxx Xxxxx at the address above or fax to 000-000-0000. If you have any questions I can be reached at 000-000-0000.

Very truly yours,

CERES MANAGED FUTURES LLC

By:		/s/ Xxxxxxxx Xxxxx
		Xxxxxxxx Xxxxx
		Chief Financial Officer & Director

XXXXXXXXX CAPITAL, L.P.
By:		/s/ Xxxxxx X. Xxxx

Print Name:		Xxxxxx X. Xxxx
XX/sr