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Beyond the most rank beginner ability, making two intersecting runs of three stones (each line open at each end), which is an automatic win for the player who makes the two lines, is illegal. |
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A moment's analysis will reveal that having a row of four of your stones, with blank spaces at each end, is a winning condition... no matter which end your opponent blocks, you will win by placing a stone at the other end. The next step before that, obviously, is having an open row of three stones; this must be blocked, or it will develop into the open row of four. The next step is to form two open rows of three, which share a common stone, which when placed, wins the game: your opponent can't block the formation of an open row of four stones. Beyond the most rank beginner ability, making this type of double open run of three stones is, interestingly enough, invalid. |
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