w +w +w +w +w +w +w +w +w +w +w +w +w +w +w +w
+---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
|-R-|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|
|---|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|
+---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
+w +w +w h e e q h q e e Q e q e e Q e Q e e e q e e q
+----+----+----+-----------+----------+-----------+---------+--------------+
|----|----|----|4:-R-----R-|*---2-----|-----------|---------|-----------R-*|
|----|----|----|4:---3-----|*-0---0-2-|-3-2-3-----|---------|-------3-----*|
+----+----+----+-------3---+----------+-------3-2-+-1-0-1-0-+-1-0-1---3----+
h q e e Q e q e e Q e Q e e e q e e q h q e e Q e q e e Q e Q e
+---------+-----------+---------+-------------+----------+-----------+---------+
|---2-----|-------5-4-|-3-2-3-2-|-3-2-3-----R-|*---2-----|-----------|---------|
|-0---0-2-|-3-2-3-----|---------|-------3-----|*-0---0-2-|-3-2-3-----|---------|
+---------+-----------+---------+---------3---+----------+-------3-2-+-1-0-1-0-+
e e q e e q 3 h q e e Q e q e e Q e Q e e e q e e q h q e e
+--------------+---------+-----------+---------+-------------+---------+
|-----------R-*|---2-----|-------5-4-|-3-2-3-2-|-3-2-3-----R-|---2-----|
|-------3-----*|-0---0-2-|-3-2-3-----|---------|-------3-----|-0---0-2-|
+-1-0-1---3----+---------+-----------+---------+---------3---+---------+
Q e e e e e Q e e e e e e e e e e e e e w
+-------------+-------------+-----------------+---+
|-----------5-|-3-3-3-3-3-3-|-3-3-3-3---------|---|
|-3-2-3-2-3---|-------------|---------3-3-----|---|
+-------------+-------------+-------------1-1-+-0-+