Query To Match Some Fields Out Of Many - HELP...

I have a table with 6 fields, and I will have all 6 parameters passed in - is there any way to write a query to give me rows based on matching ANY combination of 4 fields out of the 6 parameters passed in ? This is driving me crazy... short of doing an OR statement for all the different combinations - I have no idea how to do this....




This is what I have so far -

SELECT @nodeMachineType = nodeMachineType,
@nodePKID = NodePKID,
@biosVar = Bios,
@computerNameVar = ComputerName,
@diskVolumeVar = DiskVolume,
@guidVar = Guid,
@macAddressVar = MacAddress,
@motherboardVar = motherboard
FROM Nodes_Active
WHERE
case when Bios = @bios then 1 else 0 end +
case when ComputerName = @computerName then 1 else 0 end +
case when DiskVolume = @diskVolume then 1 else 0 end +
case when guid = @guid then 1 else 0 end +
case when macAddress = @macAddress then 1 else 0 end +
case when MotherBoard = @motherboard then 1 else 0 end >= 4