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lib/Games/Go/Sgf2Dg.pm  view on Meta::CPAN

    $been_here->{"$x,$y"} = 1;     # mark that we've been here
    my $thisStone = $diagram->game_stone(Coords2SGF($x, $y));
    return 1 unless(defined($thisStone));       # empty, the group has liberties
    return(0) if ($thisStone ne $color);        # this is an opponents stone - no liberties here!
    # this is a connected stone of the same color
    $depth++;
    if (HasLibs($x + 1, $y, $color, $been_here, $depth) or
        HasLibs($x - 1, $y, $color, $been_here, $depth) or
        HasLibs($x, $y + 1, $color, $been_here, $depth) or
        HasLibs($x, $y - 1, $color, $been_here, $depth)) {
        return(1);              # yes! we're alive!
    }
    return(0);                  # uh-oh! no liberties yet...
}

sub RemoveGroup {
    my ($x, $y, $color) = @_;

    my $thisStone = $diagram->game_stone(Coords2SGF($x, $y));
    if (defined($thisStone) and
        ($thisStone eq $color)) {

manual.tex  view on Meta::CPAN

B 26. Must be at B15.

B 42. Even in isolation this is bad. B must connect at K5.

B 60. Bad tenuki.

B 80. Having played well on the bottom, B must continue at L2.

B 92. Pointless.

B 102. Due to an OWL mistake, B thinks the corner is alive. It can of
course be attacked at S1. B sees that R1 threatens O1, and due to
a missing pattern believes there is another half eye around O5.

B 120 and 126. Pointless moves.

By move 155 W must think he has a won game.
}

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