+#ifdef HEATLESS_ALGORITHM
+#define ALGORITHM "heatless"
+#include "sim-heatless.hpp"
+#elif USUALHEAT_ALGORITHM
+#define ALGORITHM "usualheat"
+#include "sim-usualheat.hpp"
+#elif RELAXEDHEAT_ALGORITHM
+#define ALGORITHM "relaxedheat"
+#include "sim-relaxedheat.hpp"
+#else
+#error NO UPDATE-ALGORITHM DEFINED!
+#endif
+
+#include "obs_phi2.hpp"