diff --git a/tests/solver/Test_mobius_bcg.cc b/tests/solver/Test_mobius_bcg.cc
new file mode 100644
index 00000000..4b22fb18
--- /dev/null
+++ b/tests/solver/Test_mobius_bcg.cc
@@ -0,0 +1,268 @@
+   /*************************************************************************************
+
+    Grid physics library, www.github.com/paboyle/Grid 
+
+    Source file: ./tests/Test_dwf_mrhs_cg.cc
+
+    Copyright (C) 2015
+
+Author: Peter Boyle <paboyle@ph.ed.ac.uk>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+    See the full license in the file "LICENSE" in the top level distribution directory
+    *************************************************************************************/
+    /*  END LEGAL */
+#include <Grid/Grid.h>
+#include <Grid/algorithms/iterative/BlockConjugateGradient.h>
+
+using namespace std;
+using namespace Grid;
+using namespace Grid::QCD;
+
+int main (int argc, char ** argv)
+{
+  typedef typename MobiusFermionR::FermionField FermionField; 
+  typedef typename MobiusFermionR::ComplexField ComplexField; 
+  typename MobiusFermionR::ImplParams params; 
+
+  const int Ls=24;
+
+  Grid_init(&argc,&argv);
+
+  std::vector<int> latt_size   = GridDefaultLatt();
+  std::vector<int> simd_layout = GridDefaultSimd(Nd,vComplex::Nsimd());
+  std::vector<int> mpi_layout  = GridDefaultMpi();
+  std::vector<int> mpi_split (mpi_layout.size(),1);
+  std::vector<int> split_coor (mpi_layout.size(),1);
+  std::vector<int> split_dim (mpi_layout.size(),1);
+
+  GridCartesian         * UGrid   = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(), 
+								   GridDefaultSimd(Nd,vComplex::Nsimd()),
+								   GridDefaultMpi());
+  GridCartesian         * FGrid   = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid);
+  GridRedBlackCartesian * rbGrid  = SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid);
+  GridRedBlackCartesian * FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid);
+
+  /////////////////////////////////////////////
+  // Split into 1^4 mpi communicators
+  /////////////////////////////////////////////
+
+  for(int i=0;i<argc;i++){
+    if(std::string(argv[i]) == "--split"){
+      for(int k=0;k<mpi_layout.size();k++){
+	std::stringstream ss; 
+	ss << argv[i+1+k]; 
+	ss >> mpi_split[k];
+      }
+      break;
+    }
+  }
+
+ 
+  double stp = 1.e-5;
+  int nrhs = 1;
+  int me;
+  for(int i=0;i<mpi_layout.size();i++){
+//	split_dim[i] = (mpi_layout[i]/mpi_split[i]);
+	nrhs *= (mpi_layout[i]/mpi_split[i]);
+//	split_coor[i] = FGrid._processor_coor[i]/mpi_split[i];
+  }
+  std::cout << GridLogMessage << "Creating split grids " <<std::endl;
+  GridCartesian         * SGrid = new GridCartesian(GridDefaultLatt(),
+						    GridDefaultSimd(Nd,vComplex::Nsimd()),
+						    mpi_split,
+						    *UGrid,me); 
+  std::cout << GridLogMessage <<"Creating split ferm grids " <<std::endl;
+
+  GridCartesian         * SFGrid   = SpaceTimeGrid::makeFiveDimGrid(Ls,SGrid);
+  std::cout << GridLogMessage <<"Creating split rb grids " <<std::endl;
+  GridRedBlackCartesian * SrbGrid  = SpaceTimeGrid::makeFourDimRedBlackGrid(SGrid);
+  std::cout << GridLogMessage <<"Creating split ferm rb grids " <<std::endl;
+  GridRedBlackCartesian * SFrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,SGrid);
+  std::cout << GridLogMessage << "Made the grids"<<std::endl;
+  ///////////////////////////////////////////////
+  // Set up the problem as a 4d spreadout job
+  ///////////////////////////////////////////////
+  std::vector<int> seeds({1,2,3,4});
+
+  std::vector<FermionField> src(nrhs,FGrid);
+  std::vector<FermionField> src_chk(nrhs,FGrid);
+  std::vector<FermionField> result(nrhs,FGrid);
+  FermionField tmp(FGrid);
+  std::cout << GridLogMessage << "Made the Fermion Fields"<<std::endl;
+
+  for(int s=0;s<nrhs;s++) result[s]=zero;
+#undef LEXICO_TEST
+#ifdef LEXICO_TEST
+  {
+    LatticeFermion lex(FGrid);  lex = zero;
+    LatticeFermion ftmp(FGrid);
+    Integer stride =10000;
+    double nrm;
+    LatticeComplex coor(FGrid);
+    for(int d=0;d<5;d++){
+      LatticeCoordinate(coor,d);
+      ftmp = stride;
+      ftmp = ftmp * coor;
+      lex = lex + ftmp;
+      stride=stride/10;
+    }
+    for(int s=0;s<nrhs;s++) {
+      src[s]=lex;
+      ftmp = 1000*1000*s;
+      src[s] = src[s] + ftmp;
+    }    
+  }
+#else
+  GridParallelRNG pRNG5(FGrid);  pRNG5.SeedFixedIntegers(seeds);
+  for(int s=0;s<nrhs;s++) {
+    random(pRNG5,src[s]);
+    tmp = 10.0*s;
+//    src[s] = (src[s] * 0.1) + tmp;
+    std::cout << GridLogMessage << " src ["<<s<<"] "<<norm2(src[s])<<std::endl;
+  }
+#endif
+  std::cout << GridLogMessage << "Intialised the Fermion Fields"<<std::endl;
+
+  LatticeGaugeField Umu(UGrid); 
+  FieldMetaData header;
+    std::string file("./lat.in.24ID");
+    SU3::ColdConfiguration(Umu);
+    std::cout << GridLogMessage << "Intialised the COLD Gauge Field"<<std::endl;
+  if(1) { 
+    NerscIO::readConfiguration(Umu,header,file);
+    std::cout << GridLogMessage << " "<<file<<" successfully read" <<std::endl;
+  } else {
+    GridParallelRNG pRNG(UGrid );  
+    std::cout << GridLogMessage << "Intialising 4D RNG "<<std::endl;
+    pRNG.SeedFixedIntegers(seeds);
+    std::cout << GridLogMessage << "Intialised 4D RNG "<<std::endl;
+    SU3::HotConfiguration(pRNG,Umu);
+    std::cout << GridLogMessage << "Intialised the HOT Gauge Field"<<std::endl;
+    std::cout << " Site zero "<< Umu._odata[0]   <<std::endl;
+  } 
+   int precision32 = 0;
+   int tworow      = 0;
+   std::string file2("./lat.out");
+   NerscIO::writeConfiguration(Umu,file2,tworow,precision32);
+   std::cout << GridLogMessage << " Successfully saved to " <<file2 <<std::endl;
+  /////////////////
+  // MPI only sends
+  /////////////////
+  LatticeGaugeField s_Umu(SGrid);
+  FermionField s_src(SFGrid);
+  FermionField s_tmp(SFGrid);
+  FermionField s_res(SFGrid);
+
+  std::cout << GridLogMessage << "Made the split grid fields"<<std::endl;
+  ///////////////////////////////////////////////////////////////
+  // split the source out using MPI instead of I/O
+  ///////////////////////////////////////////////////////////////
+  Grid_split  (Umu,s_Umu);
+  Grid_split  (src,s_src);
+  std::cout << GridLogMessage << " split rank  " <<me << " s_src "<<norm2(s_src)<<std::endl;
+
+#ifdef LEXICO_TEST
+  FermionField s_src_tmp(SFGrid);
+  FermionField s_src_diff(SFGrid);
+  {
+    LatticeFermion lex(SFGrid);  lex = zero;
+    LatticeFermion ftmp(SFGrid);
+    Integer stride =10000;
+    double nrm;
+    LatticeComplex coor(SFGrid);
+    for(int d=0;d<5;d++){
+      LatticeCoordinate(coor,d);
+      ftmp = stride;
+      ftmp = ftmp * coor;
+      lex = lex + ftmp;
+      stride=stride/10;
+    }
+    s_src_tmp=lex;
+    ftmp = 1000*1000*me;
+    s_src_tmp = s_src_tmp + ftmp;
+  }
+  s_src_diff = s_src_tmp - s_src;
+  std::cout << GridLogMessage <<" LEXICO test:  s_src_diff " << norm2(s_src_diff)<<std::endl;
+#endif
+
+  ///////////////////////////////////////////////////////////////
+  // Set up N-solvers as trivially parallel
+  ///////////////////////////////////////////////////////////////
+  std::cout << GridLogMessage << " Building the solvers"<<std::endl;
+//  RealD mass=0.00107;
+  RealD mass=0.01;
+  RealD M5=1.8;
+  RealD mobius_factor=4;
+  RealD mobius_b=0.5*(mobius_factor+1.);
+  RealD mobius_c=0.5*(mobius_factor-1.);
+  MobiusFermionR Dchk(Umu,*FGrid,*FrbGrid,*UGrid,*rbGrid,mass,M5,mobius_b,mobius_c);
+  MobiusFermionR Ddwf(s_Umu,*SFGrid,*SFrbGrid,*SGrid,*SrbGrid,mass,M5,mobius_b,mobius_c);
+
+  std::cout << GridLogMessage << "****************************************************************** "<<std::endl;
+  std::cout << GridLogMessage << " Calling DWF CG "<<std::endl;
+  std::cout << GridLogMessage << "****************************************************************** "<<std::endl;
+
+  MdagMLinearOperator<MobiusFermionR,FermionField> HermOp(Ddwf);
+  MdagMLinearOperator<MobiusFermionR,FermionField> HermOpCk(Dchk);
+  ConjugateGradient<FermionField> CG((stp),10000);
+  s_res = zero;
+//  CG(HermOp,s_src,s_res);
+
+  std::cout << GridLogMessage << " split residual norm "<<norm2(s_res)<<std::endl;
+  /////////////////////////////////////////////////////////////
+  // Report how long they all took
+  /////////////////////////////////////////////////////////////
+  std::vector<uint32_t> iterations(nrhs,0);
+  iterations[me] = CG.IterationsToComplete;
+
+  for(int n=0;n<nrhs;n++){
+    UGrid->GlobalSum(iterations[n]);
+    std::cout << GridLogMessage<<" Rank "<<n<<" "<< iterations[n]<<" CG iterations"<<std::endl;
+  }
+
+  /////////////////////////////////////////////////////////////
+  // Gather and residual check on the results
+  /////////////////////////////////////////////////////////////
+  std::cout << GridLogMessage<< "Unsplitting the result"<<std::endl;
+  Grid_unsplit(result,s_res);
+
+
+  std::cout << GridLogMessage<< "Checking the residuals"<<std::endl;
+  for(int n=0;n<nrhs;n++){
+    std::cout << GridLogMessage<< " res["<<n<<"] norm "<<norm2(result[n])<<std::endl;
+    HermOpCk.HermOp(result[n],tmp); tmp = tmp - src[n];
+    std::cout << GridLogMessage<<" resid["<<n<<"]  "<< norm2(tmp)/norm2(src[n])<<std::endl;
+  }
+
+// faking enlarged/cooperative CG
+  assert(me < nrhs);
+  if (me>0) src[me] = src[0];
+  for(int s=0;s<nrhs;s++){
+     result[s]=zero;
+     if(s!=me) src[s] = zero;
+  }
+
+  int blockDim = 0;//not used for BlockCGVec
+  BlockConjugateGradient<FermionField>    BCGV  (BlockCGVec,blockDim,stp,10000);
+  BCGV.PrintInterval=10;
+{
+  BCGV(HermOpCk,src,result);
+}
+
+
+  Grid_finalize();
+}