Write a basic view function. Without styling, it's impossible to see.

Go/Decoders.elm

@@ -1,11 +1,9 @@
 module Go.Decoders exposing (..)
 import Go.Types exposing (..)
+import Go.Util exposing (pair)
 import Json.Decode as Decode
 import Json.Decode.Pipeline exposing (decode, required)
 
-pair : a -> b -> (a, b)
-pair a1 a2 = (a1, a2)
-
 decodeIndex : Decode.Decoder Index
 decodeIndex = decode pair
     |> required "x" Decode.int

Go/Types.elm

@@ -26,6 +26,6 @@ type alias Flags =
     }
 
 type Msg =
-      Place Cell
+      Place Index
     | Update String
     | DismissError

Go/Util.elm

@@ -1,6 +1,9 @@
 module Go.Util exposing (..)
 import Go.Types exposing (..)
 
+pair : a -> b -> (a, b)
+pair a1 a2 = (a1, a2)
+
 -- Search for a value in a list of key-value pairs.
 lookup : a -> List (a, b) -> Maybe b
 lookup val list = Maybe.map Tuple.second (List.head (List.filter (\(a, _) -> a == val) list))
@@ -19,3 +22,6 @@ zip : List a -> List b -> List (a, b)
 zip xs ys = case (xs, ys) of
     (x::xb, y::yb) -> (x, y) :: (zip xb yb)
     _ -> []
+
+swap : (a -> b -> c) -> b -> a -> c
+swap f vb va = f va vb

Go/View.elm

@@ -0,0 +1,26 @@
+module Go.View exposing (..)
+import Go.Util exposing (allIndices, pair, lookup)
+import Go.Types exposing (..)
+import Html exposing (Html, div, text, p)
+import Html.Attributes exposing (class, classList)
+import Html.Events exposing (onClick)
+
+renderIndex : (Index, Maybe Color) -> Html Msg
+renderIndex (index, color) = 
+    let
+        extraClass = case color of
+            Just c -> (if c == Black then "black-cell" else "white-cell", True)
+            Nothing -> ("", False)
+    in
+        div [ classList [ ("board-cell", True), extraClass ]
+            , onClick (Place index)
+            ]
+            [ 
+            ]
+
+renderBoard : Int -> Board -> Html Msg
+renderBoard size board = 
+    let 
+        cells = List.map (\i -> (lookup i board) |> (pair i)) <| allIndices size
+    in
+        div [] <| List.map renderIndex cells