1 files changed, 140 insertions, 0 deletions

diff --git a/src/solvers/coord/drfinnoe.h b/src/solvers/coord/drfinnoe.h
new file mode 100644
index 0000000..984b10a
--- /dev/null
+++ b/src/solvers/coord/drfinnoe.h
@@ -0,0 +1,140 @@
+/*
+TODO
+
+The pruning table for this coordinate shows some odd behavior, which
+is actually also present in nissy-classic: after completing depth 14,
+if the search is let run for higher depth, no more positions are found.
+This could be as simple as a small bug in the logic of the pruning table
+calculations - I may be assuming somewhere that I am never going to search
+for depths >= 15, since they are the highest possible value anyway -
+or some reason related to symmetry - are some cases actually impossible?
+In the worst case, it is a bug to be fixed, but I find it unlikely.
+*/
+
+#define CLASSES_CP_16 2768
+
+STATIC uint64_t coordinate_cp_coord(cube_t);
+STATIC cube_t coordinate_cp_cube(uint64_t);
+STATIC uint64_t coordinate_epud_coord(cube_t);
+STATIC cube_t coordinate_epud_cube(uint64_t);
+STATIC cube_t coordinate_drfinnoe_merge(cube_t, cube_t);
+
+STATIC uint64_t coordinate_drfinnoe_coord(cube_t, const unsigned char *);
+STATIC cube_t coordinate_drfinnoe_cube(uint64_t, const unsigned char *);
+STATIC bool coordinate_drfinnoe_isnasty(uint64_t, const unsigned char *);
+STATIC size_t coordinate_drfinnoe_gendata(unsigned char *);
+
+STATIC bool is_drfinnoe_solvable(cube_t);
+
+STATIC coord_t coordinate_drfinnoe = {
+        .name = "DRFINNOE",
+        .coord = &coordinate_drfinnoe_coord,
+        .cube = &coordinate_drfinnoe_cube,
+        .isnasty = &coordinate_drfinnoe_isnasty,
+        .gendata = coordinate_drfinnoe_gendata,
+        .max = CLASSES_CP_16 * FACT_8,
+        .trans_mask = TM_UDFIX,
+        .moves_mask = MM18_DR,
+        .axistrans = {
+                [AXIS_UD] = TRANS_UFr,
+                [AXIS_RL] = TRANS_RFr,
+                [AXIS_FB] = TRANS_FDr,
+        },
+        .is_admissible = &solution_always_valid,
+        .is_solvable = &is_drfinnoe_solvable,
+        .pruning_distribution = {
+                [0] = 1,
+                [1] = 3,
+                [2] = 10,
+                [3] = 52,
+                [4] = 285,
+                [5] = 1318,
+                [6] = 5671,
+                [7] = 26502,
+                [8] = 115467,
+                [9] = 470846,
+                [10] = 1853056,
+                [11] = 6535823,
+                [12] = 18349792,
+                [13] = 32843350,
+                [14] = 34118883,
+                [15] = 17284701
+        },
+        .pruning_max = 15,
+        .sym = {
+                .classes = CLASSES_CP_16,
+                .max = FACT_8,
+                .coord = &coordinate_cp_coord,
+                .cube = &coordinate_cp_cube,
+                .max2 = FACT_8,
+                .coord2 = &coordinate_epud_coord,
+                .cube2 = &coordinate_epud_cube,
+                .merge = &coordinate_drfinnoe_merge,
+        },
+};
+
+STATIC uint64_t
+coordinate_cp_coord(cube_t c)
+{
+        return coord_cp(c);
+}
+
+STATIC cube_t
+coordinate_cp_cube(uint64_t i)
+{
+        return invcoord_cp(i);
+}
+
+STATIC uint64_t
+coordinate_epud_coord(cube_t c)
+{
+        return coord_epud(c);
+}
+
+STATIC cube_t
+coordinate_epud_cube(uint64_t i)
+{
+        return invcoord_epud(i);
+}
+
+STATIC cube_t
+coordinate_drfinnoe_merge(cube_t c1, cube_t c2)
+{
+        cube_t merged;
+
+        merged = c1;
+        copy_edges(&merged, c2);
+
+        return merged;
+}
+
+STATIC uint64_t
+coordinate_drfinnoe_coord(cube_t cube, const unsigned char *data)
+{
+        return coord_coord_generic(&coordinate_drfinnoe, cube, data);
+}
+
+STATIC cube_t
+coordinate_drfinnoe_cube(uint64_t i, const unsigned char *data)
+{
+        return coord_cube_generic(&coordinate_drfinnoe, i, data);
+}
+
+STATIC bool
+coordinate_drfinnoe_isnasty(uint64_t i, const unsigned char *data)
+{
+        return coord_isnasty_generic(&coordinate_drfinnoe, i, data);
+}
+
+STATIC size_t
+coordinate_drfinnoe_gendata(unsigned char *data)
+{
+        return coord_gendata_generic(&coordinate_drfinnoe, data);
+}
+
+STATIC bool
+is_drfinnoe_solvable(cube_t cube) {
+        return coord_eo(cube) == 0 &&
+               coord_eo(transform_edges(cube, TRANS_URr)) == 0 &&
+               coord_co(cube) == 0;
+}