See my comments on 1386410. This merge is not feasible as the senses apply to different kanji forms.

@@ -6,6 +5,0 @@
-</k_ele>
-<k_ele>
-<keb>説明す</keb>
-</k_ele>
-<k_ele>
-<keb>説き明かす</keb>
@@ -28,8 +21,0 @@
-<k_ele>
-<keb>説き明す</keb>
-<ke_inf>&sK;</ke_inf>
-</k_ele>
-<k_ele>
-<keb>説明かす</keb>
-<ke_inf>&sK;</ke_inf>
-</k_ele>
@@ -40,2 +25,0 @@
-<stagk>解き明かす</stagk>
-<stagk>解明す</stagk>
@@ -44 +27,0 @@
-<gloss>to reveal (e.g. the truth)</gloss>
@@ -47,8 +30 @@
-</sense>
-<sense>
-<stagk>説明す</stagk>
-<stagk>説き明かす</stagk>
-<pos>&v5s;</pos>
-<pos>&vt;</pos>
-<gloss>to explain</gloss>
-<gloss>to make clear</gloss>
+<gloss>to reveal</gloss>

sankoku, daijr/s, smk, meikyo

Google N-gram Corpus Counts
╭─ーーーーー─┬─────────┬───────╮
│ 解き明かす │ 201,197 │ 76.1% │
│ 解明かす　 │     155 │  0.1% │
│ 解き明す　 │     280 │  0.1% │
│ 解明す　　 │  11,406 │  4.3% │
│ 説き明かす │  12,665 │  4.8% │
│ 説明かす　 │       0 │  0.0% │
│ 説き明す　 │     128 │  0.0% │
│ 説明す　　 │  38,064 │ 14.4% │
│ とき明かす │     412 │  0.2% │
╰─ーーーーー─┴─────────┴───────╯

merged with "説き明かす" like smk does as they're deeply connected and it doesn't seem confusing to do so
added new forms
hopefully made more clear the emphasis on "solving" for 解- and "explaining" for 説-

@@ -6,0 +7,29 @@
+<k_ele>
+<keb>説明す</keb>
+</k_ele>
+<k_ele>
+<keb>説き明かす</keb>
+</k_ele>
+<k_ele>
+<keb>解明す</keb>
+</k_ele>
+<k_ele>
+<keb>とき明かす</keb>
+<ke_inf>&sK;</ke_inf>
+</k_ele>
+<k_ele>
+<keb>解き明す</keb>
+<ke_inf>&sK;</ke_inf>
+</k_ele>
+<k_ele>
+<keb>解明かす</keb>
+<ke_inf>&sK;</ke_inf>
+</k_ele>
+<k_ele>
+<keb>説き明す</keb>
+<ke_inf>&sK;</ke_inf>
+</k_ele>
+<k_ele>
+<keb>説明かす</keb>
+<ke_inf>&sK;</ke_inf>
+</k_ele>
@@ -10,0 +40,11 @@
+<stagk>解き明かす</stagk>
+<stagk>解明す</stagk>
+<pos>&v5s;</pos>
+<pos>&vt;</pos>
+<gloss>to reveal (e.g. the truth)</gloss>
+<gloss>to uncover</gloss>
+<gloss>to solve</gloss>
+</sense>
+<sense>
+<stagk>説明す</stagk>
+<stagk>説き明かす</stagk>
@@ -14 +54 @@
-<gloss>to dispel doubts</gloss>
+<gloss>to make clear</gloss>