Events and games
Reversi starting position (Black to move, 4 legal moves)
The opening position of reversi: four stones in the centre four squares, black and white alternating
This drawing comes from one YAML file. No shape was moved by hand.
Notes in the source (in Japanese)
「オセロ」は登録商標なので、一般名の「リバーシ」で描いている。盤は 8×8 のマス、石はマスの中央。盤の 4 点は線の交点(実物の盤と同じ位置)。着手可能点は小さな丸 —— 実物の対局では盤に印は無いが、解説図では示す。
盤面だけで局面が決まる。 石は裏返して使い回すので持ち駒が無く、将棋(見本 67)と違って、盤の絵を写せばそれで足りる ——必要なのは盤面と手番の 2 つだけ。
初期配置が中央 4 マスに交差で置かれているから、着手可能点が 4 つになる。同じ色を縦横に並べると、最初の一手の選べる場所が変わる。
Source (YAML)
examples/gallery/70-リバーシの局面図.zumen.yaml
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