diff --git a/src/crypto/equihash.cpp b/src/crypto/equihash.cpp
index 57a5f4dac..b5caba956 100644
--- a/src/crypto/equihash.cpp
+++ b/src/crypto/equihash.cpp
@@ -654,6 +654,16 @@ template bool Equihash<96,3>::OptimisedSolve(const eh_HashState& base_state,
                                              const std::function<bool(EhSolverCancelCheck)> cancelled);
 template bool Equihash<96,3>::IsValidSolution(const eh_HashState& base_state, std::vector<eh_index> soln);
 
+// Explicit instantiations for Equihash<200,9>
+template int Equihash<200,9>::InitialiseState(eh_HashState& base_state);
+template bool Equihash<200,9>::BasicSolve(const eh_HashState& base_state,
+                                          const std::function<bool(std::vector<eh_index>)> validBlock,
+                                          const std::function<bool(EhSolverCancelCheck)> cancelled);
+template bool Equihash<200,9>::OptimisedSolve(const eh_HashState& base_state,
+                                              const std::function<bool(std::vector<eh_index>)> validBlock,
+                                              const std::function<bool(EhSolverCancelCheck)> cancelled);
+template bool Equihash<200,9>::IsValidSolution(const eh_HashState& base_state, std::vector<eh_index> soln);
+
 // Explicit instantiations for Equihash<96,5>
 template int Equihash<96,5>::InitialiseState(eh_HashState& base_state);
 template bool Equihash<96,5>::BasicSolve(const eh_HashState& base_state,
diff --git a/src/crypto/equihash.h b/src/crypto/equihash.h
index c03b23566..7b06ecb08 100644
--- a/src/crypto/equihash.h
+++ b/src/crypto/equihash.h
@@ -171,12 +171,15 @@ public:
 #include "equihash.tcc"
 
 static Equihash<96,3> Eh96_3;
+static Equihash<200,9> Eh200_9;
 static Equihash<96,5> Eh96_5;
 static Equihash<48,5> Eh48_5;
 
 #define EhInitialiseState(n, k, base_state)  \
     if (n == 96 && k == 3) {                 \
         Eh96_3.InitialiseState(base_state);  \
+    } else if (n == 200 && k == 9) {         \
+        Eh200_9.InitialiseState(base_state); \
     } else if (n == 96 && k == 5) {          \
         Eh96_5.InitialiseState(base_state);  \
     } else if (n == 48 && k == 5) {          \
@@ -191,6 +194,8 @@ inline bool EhBasicSolve(unsigned int n, unsigned int k, const eh_HashState& bas
 {
     if (n == 96 && k == 3) {
         return Eh96_3.BasicSolve(base_state, validBlock, cancelled);
+    } else if (n == 200 && k == 9) {
+        return Eh200_9.BasicSolve(base_state, validBlock, cancelled);
     } else if (n == 96 && k == 5) {
         return Eh96_5.BasicSolve(base_state, validBlock, cancelled);
     } else if (n == 48 && k == 5) {
@@ -213,6 +218,8 @@ inline bool EhOptimisedSolve(unsigned int n, unsigned int k, const eh_HashState&
 {
     if (n == 96 && k == 3) {
         return Eh96_3.OptimisedSolve(base_state, validBlock, cancelled);
+    } else if (n == 200 && k == 9) {
+        return Eh200_9.OptimisedSolve(base_state, validBlock, cancelled);
     } else if (n == 96 && k == 5) {
         return Eh96_5.OptimisedSolve(base_state, validBlock, cancelled);
     } else if (n == 48 && k == 5) {
@@ -232,6 +239,8 @@ inline bool EhOptimisedSolveUncancellable(unsigned int n, unsigned int k, const
 #define EhIsValidSolution(n, k, base_state, soln, ret)   \
     if (n == 96 && k == 3) {                             \
         ret = Eh96_3.IsValidSolution(base_state, soln);  \
+    } else if (n == 200 && k == 9) {                     \
+        ret = Eh200_9.IsValidSolution(base_state, soln); \
     } else if (n == 96 && k == 5) {                      \
         ret = Eh96_5.IsValidSolution(base_state, soln);  \
     } else if (n == 48 && k == 5) {                      \