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diff --git a/src/md_solve.h b/src/md_solve.h
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+/*
+ * Quasimaximal slicing -- actual solver code
+ * Copyright (C) 2016 Anton Khirnov <anton@khirnov.net>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MD_SOLVE_H
+#define MD_SOLVE_H
+
+#include "common.h"
+
+#include "cctk.h"
+
+#include "basis.h"
+#include "threadpool.h"
+
+typedef struct MDSolverPriv MDSolverPriv;
+
+typedef struct MDSolver {
+    MDSolverPriv *priv;
+
+    unsigned int nb_equations;
+
+    MDBasisSetContext *basis[2][2];
+
+    int nb_coeffs[2];
+    int nb_colloc_points[2];
+
+    double *coeffs;
+
+    ThreadPoolContext *tp;
+} MDSolver;
+
+int md_solver_init(MDSolver **ctx,
+                   cGH *cctkGH, ThreadPoolContext *tp,
+                   unsigned int nb_equations,
+                   unsigned int (*basis_order)[2],
+                   double sf, double filter_power, double input_filter_power);
+
+void md_solver_free(MDSolver **ctx);
+
+int md_solver_solve(MDSolver *ctx);
+
+void md_solver_print_stats(MDSolver *ctx);
+
+#endif /* MD_SOLVE_H */