diff --git a/README.md b/README.rst
similarity index 54%
rename from README.md
rename to README.rst
index ed58553..ba1aced 100644
--- a/README.md
+++ b/README.rst
@@ -1,16 +1,21 @@
-# goban
+goban
+#####
 
 Parametric goban and stones for blind players
 
 - One version for 3D printing + CNC
 - One version for laser-cutting
+- One flat version for 3D printing only
 
-## Laser-cutting version
+Laser-cutting version
+---------------------
 
 - Engrave then cut one base.
 - Engrave verso of upper sheet.
 - Engrave then cut recto of upper sheet.
 - Stick upper sheet on base.
 
-Hint : create three goban, each in an other color.
-Reorder your stones to have good colors for each set.
+.. hint::
+
+   Create three goban, each in an other color.
+   Reorder your stones to have good colors for each set.
diff --git a/flat3dprint/black_stones.scad b/flat3dprint/black_stones.scad
new file mode 100644
index 0000000..65546ae
--- /dev/null
+++ b/flat3dprint/black_stones.scad
@@ -0,0 +1,40 @@
+include <params.scad>
+use <white_stones.scad>
+
+module bstone() {
+    difference() {
+        wstone();
+        for($r=[$mark_thickness/2:2*$mark_thickness:$stone_radius]) {
+            translate([0, 0, -1]) {
+                difference() {
+                    cylinder(r=$r+$mark_thickness/2, h=$stone_height/3+1, $fn=200);
+                    translate([0, 0, -1]) {
+                        cylinder(r=$r-$mark_thickness/2, h=$stone_height/3+2, $fn=200);
+                    }
+                }
+            }
+            translate([0, 0, $stone_height*2/3]) {
+                difference() {
+                    cylinder(r=$r+$mark_thickness/2, h=$stone_height/3+1, $fn=200);
+                    translate([0, 0, -1]) {
+                        cylinder(r=$r-$mark_thickness/2, h=$stone_height/3+2, $fn=200);
+                    }
+                }
+            }
+        }
+    }
+}
+
+$median = floor($goban_size/2);
+
+for($x=[$median:$goban_size-1]) {
+    for($y=[0:$goban_size-1]) {
+        if($x>$median || ($x==$median && $y>=$median)) {
+            translate([
+                $x*2*($stone_radius+$stone_clearance),
+                $y*2*($stone_radius+$stone_clearance), 0]) {
+                bstone();
+            }
+        }
+    }
+}
diff --git a/flat3dprint/export/9x9_black_stones.stl b/flat3dprint/export/9x9_black_stones.stl
new file mode 100644
index 0000000..d4bec29
Binary files /dev/null and b/flat3dprint/export/9x9_black_stones.stl differ
diff --git a/flat3dprint/export/9x9_goban.stl b/flat3dprint/export/9x9_goban.stl
new file mode 100644
index 0000000..3e45e7e
Binary files /dev/null and b/flat3dprint/export/9x9_goban.stl differ
diff --git a/flat3dprint/export/9x9_white_stones.stl b/flat3dprint/export/9x9_white_stones.stl
new file mode 100644
index 0000000..4dc0ce7
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diff --git a/flat3dprint/goban.scad b/flat3dprint/goban.scad
new file mode 100644
index 0000000..b81049d
--- /dev/null
+++ b/flat3dprint/goban.scad
@@ -0,0 +1,61 @@
+include <params.scad>
+
+module goban() {
+    $goban_width = $cell_width*($goban_size-1) +
+        $goban_size*$line_width +
+        $goban_padding*2;
+
+    $goban_length = $cell_length*($goban_size-1) +
+        $goban_size*$line_width +
+        $goban_padding*2;
+
+    difference() {
+        cube([$goban_width, $goban_length, $goban_height]);
+        for(n=[0:$goban_size-1]) {
+            translate([
+                    $goban_padding,
+                    $goban_padding + n*($cell_length+$line_width),
+                    $goban_height - $line_depth])
+                cube([
+                    $goban_size*($line_width+$cell_width)-$cell_length,
+                    $line_width,
+                    $line_depth+1
+                ]);
+            translate([
+                    $goban_padding + n*($cell_width+$line_width),
+                    $goban_padding,
+                    $goban_height - $line_depth])
+                cube([
+                    $line_width,
+                    $goban_size*($line_width+$cell_length)-$cell_length,
+                    $line_depth+1
+                ]);
+            for(y=[0:$goban_size-1]) {
+                translate([
+                        $goban_padding + n*($cell_width+$line_width),
+                        $goban_padding + y*($cell_length+$line_width),
+                        -1
+                ]) union() {
+                    translate([0, 0, 1 + $goban_height - $stone_height])
+                        cylinder(
+                            h=$stone_height+1,
+                            r=$stone_radius+$stone_clearance,
+                            $fn=200);
+                    if(search(n+1, $hoshi_pos) && search(y+1, $hoshi_pos)) {
+                        cylinder(
+                            h=$goban_height+1,
+                            r=$hoshi_radius,
+                            $fn=200);
+                    } else {
+                        cylinder(
+                            h=$goban_height+1,
+                            r=$goban_hole_radius,
+                            $fn=200);
+                    }
+                }
+            }
+        }
+    }
+}
+
+goban();
diff --git a/flat3dprint/params.scad b/flat3dprint/params.scad
new file mode 100644
index 0000000..091d7a1
--- /dev/null
+++ b/flat3dprint/params.scad
@@ -0,0 +1,15 @@
+$stone_height = 2;
+$stone_radius = 6.25;
+$stone_clearance = 0.25;
+$mark_thickness = 1.5;
+$hoshi_radius = 2;
+$goban_hole_radius = 1;
+$goban_height = 3;
+$line_depth = 1;
+$cell_width = 13;
+$cell_length = 13;
+$goban_padding = 9;
+$line_width = 1;
+$goban_size = 9;
+$hoshi_pos = [3, 7];
+// [4, 10, 16] for 19x19, [4, 7, 10] for 13x13, [3, 7] for 9x9
diff --git a/flat3dprint/white_stones.scad b/flat3dprint/white_stones.scad
new file mode 100644
index 0000000..8b678be
--- /dev/null
+++ b/flat3dprint/white_stones.scad
@@ -0,0 +1,24 @@
+include <params.scad>
+
+module wstone() {
+    difference() {
+       cylinder(h=$stone_height, r=$stone_radius, $fn=200);
+       translate([1.5*$stone_radius, 0, -1]) {
+           cylinder(h=$stone_height+2, r=$stone_radius, $fn=200);
+       }
+    }
+}
+
+$median = floor($goban_size/2);
+
+for($x=[0:$median]) {
+    for($y=[0:$goban_size-1]) {
+        if($x<$median || ($x==$median && $y<$median)) {
+            translate([
+                $x*2*($stone_radius+$stone_clearance),
+                $y*2*($stone_radius+$stone_clearance), 0]) {
+                wstone();
+            }
+        }
+    }
+}