-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 EjGSRLmz8WrwqdcfdRCI0cTrtMDzTzt24ydOViu/QfAsrwQXByPySriKKQvK14DQ
 0F1vBpN6jEjDG1umhWAZuA==

<SEC-DOCUMENT>0001376566-09-000003.txt : 20090313
<SEC-HEADER>0001376566-09-000003.hdr.sgml : 20090313
<ACCEPTANCE-DATETIME>20090312183231
ACCESSION NUMBER:		0001376566-09-000003
CONFORMED SUBMISSION TYPE:	D/A
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20090313
DATE AS OF CHANGE:		20090312
EFFECTIVENESS DATE:		20090313

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TCW Alpha Tactical B (CI) LP
		CENTRAL INDEX KEY:			0001376566
		IRS NUMBER:				980506698
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-95098
		FILM NUMBER:		09676949

	BUSINESS ADDRESS:	
		STREET 1:		865 South Figueroa Street
		STREET 2:		Ste 1800
		CITY:			Los Angeles
		STATE:			CA
		ZIP:			90017
		BUSINESS PHONE:		2132440000

	MAIL ADDRESS:	
		STREET 1:		865 South Figueroa Street
		STREET 2:		Ste 1800
		CITY:			Los Angeles
		STATE:			CA
		ZIP:			90017
</SEC-HEADER>
<DOCUMENT>
<TYPE>D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0201</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001376566</cik>
        <entityName>TCW Alpha Tactical B (CI) LP</entityName>
        <issuerAddress>
            <street1>865 South Figueroa Street</street1>
            <street2>Ste 1800</street2>
            <city>Los Angeles</city>
            <stateOrCountry>CA</stateOrCountry>
            <zipCode>90017</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>2132440000</issuerPhoneNumber>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <jurisdictionOfInc>E9</jurisdictionOfInc>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2006</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>TCW Asset Management</firstName>
                <middleName></middleName>
                <lastName>Company International Limited</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 S. Figueroa Street</street1>
                <street2>Suite 1800</street2>
                <city>Los Angeles</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>THIS IS NOT A DIRECTOR, THIS IS THE GENERAL PARTNER OF ISSUER</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <middleName>D.</middleName>
                <lastName>Beyer</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 S. Figueroa Street</street1>
                <street2>Suite 1800</street2>
                <city>Los Angeles</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>DIRECTOR &amp; CHIEF EXECUTIVE OFFICER</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <middleName>E.</middleName>
                <lastName>Cahill</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>856 S. Figueroa Street</street1>
                <street2>Suite 1800</street2>
                <city>Los Angeles</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>DIRECTOR, EXECUTIVE VICE PRESIDENT, GENERAL COUNSEL &amp; SECRETARY</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>David</firstName>
                <middleName>S.</middleName>
                <lastName>Devito</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 S. Figueroa Street</street1>
                <street2>Suite 1800</street2>
                <city>Los Angeles</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>DIRECTOR, EXECUTIVE VICE PRESIDENT, CHIEF ADMINISTRATIVE OFFICER</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Jeffrey</firstName>
                <middleName>E.</middleName>
                <lastName>Gundlach</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 S. Figueroa Street</street1>
                <street2>Suite 1800</street2>
                <city>Los Angeles</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>DIRECTOR &amp; PRESIDENT</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Hilary</firstName>
                <middleName>G.D.</middleName>
                <lastName>Lord</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 S. Figueroa Street</street1>
                <street2>Suite 1800</street2>
                <city>Los Angeles</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>MANAGING DIRECTOR &amp; CHIEF COMPLIANCE OFFICER</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Richard</firstName>
                <middleName>M.</middleName>
                <lastName>Villa</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 S. Figueroa Street</street1>
                <street2>Suite 1800</street2>
                <city>Los Angeles</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>MANAGING DIRECTOR, CHIEF FINANCIAL OFFICER &amp; ASSISTANT SECRETARY</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>TCW Funds</firstName>
                <middleName></middleName>
                <lastName>Distributors</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 S. Figueroa Street</street1>
                <street2>Suite 1800</street2>
                <city>Los Angeles</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>BROKER-DEALER/PROMOTER</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Hedge Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <aggregateNetAssetValueRange>Decline to Disclose</aggregateNetAssetValueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>9999999997-06-040109</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2006-09-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>1000000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>N/A</recipientName>
                <recipientCRDNumber>None</recipientCRDNumber>
                <associatedBDName>TCW Funds DIstributors</associatedBDName>
                <associatedBDCRDNumber>16670</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>865 S. Figueroa Street</street1>
                    <street2>Suite 1800</street2>
                    <city>Los Angeles</city>
                    <stateOrCountry>CA</stateOrCountry>
                    <zipCode>90017</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>45138260</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>1</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse>NOT APPLICABLE</clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>NOT APPLICABLE</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>TCW Alpha Tactical B (CI) LP</issuerName>
                <signatureName>Natalie Maniaci</signatureName>
                <nameOfSigner>Natalie Maniaci</nameOfSigner>
                <signatureTitle>VP of G.P.</signatureTitle>
                <signatureDate>2009-03-12</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----