p.boxed
  | The first player to capture something wins.

p
  | This game follows the rules of 
  a(href="https://en.wikipedia.org/wiki/Go_(game)") Weiqi
  | , or Go in japanese. However, the first player to achieve a capture
  | wins, and the board size is arbitrarily reduced to 12 x 12.

h3 Rules summary

p.
  No diagonals are considered on the board.
  Therefore, "adjacent" will mean "orthogonally adjacent".

ul
  li Players alternate turns, starting with Black.
  li.
    A move consists in putting a stone on an intersection of the board.
    This stone will never move. However, it can be captured.
  li.
    A move adjacent to a connected group of enemy stones "kills" the group
    if it has exactly one liberty left: its stones are removed from the board.
    The capturing player thus wins.

p.
  Considering stones as vertices on a graph, linked by an edge if they
  are adjacent, a connected group is a connected sub-graph.
  On the diagram below, removing a stone at the marked location
  breaks the connection.

figure.diagram-container
  .diagram.diag12
    | fen:93/93/93/2PPP2p4/4P2p4/3PP2p4/3P2ppp3/2PP2p1p3/2P5pp2/93/93/93 d7,h6:
  .diagram.diag22
    | fen:93/93/93/2PPP2p4/4P2p4/4P2p4/3P2p1p3/2PP2p1p3/2P5pp2/93/93/93 d7,h6:
  figcaption.
    Left: both groups connected.
    Right: "both disconnected" (2 groups for black, 3 for white).

p.
  The liberties of a group are all the free intersections adjacent to a stone
  of the group, as illustrated.

figure.diagram-container
  .diagram
    | fen:5pp5/93/93/93/3P8/3PP5pp/91p1/93/93/6P5/93/93 e12,f11,g11,h12,c7,c8,d9,e8,f7,e6,d6,g2,g4,f3,h3,k5,l6,j6,j7,k8,l8:
  figcaption Surrounding marks indicate groups' liberties.

p.
  The initial configuration is formed by two pairs of groups of one stone
  each, with only two liberties per group. Everything is disconnected.