Complex examples come from a recent game of mine.
|Table of contents||Table of diagrams
I'll Show you Complication! (Black to Play)
Moves 50 to 59
Moves 73 to 82
Moves 83 to 92
White + 148.5
A Pacifistic Opening
This is the beginning of a game a friend of mine and I played. she was Black, I played White. After a small tussle to determine the status of the lower-left corner, Black occupied the right central Star Point to prevent me from forming a Chinese Fuseki by playing at a. Black last move , prevented me from crossing under to help escape. establishes a base for that lonely stone and fighting ensued.
This is where things start to get interesting. Black's group on the right is now under attack, whereas my group on the top is very much alive. My friend starts a reletively large ko (which eventually becomes quite small) with . At this point, the ko looks to save the life of her black group on the right and put pressure on and . Violent, no?
...And this is where it's all gone wrong for Black. The black group in the upper right is quite dead at this point as the attachment at seals the group in (if you're curious about this, read about at Life And Death). Meanwhile, my previously vulnerable group centered around has all but escaped its encirclement. The presence of prevents from establishing a base. A white move at a (coming a few moves later) will completely trap the lone black stone. This was way more active than any of our previous games--causing serious problems for my friend.
White not connecting in response to the peep of was probably a little reckless, after , , and it's pretty clear that two black stones near are all but dead. Moreover, the large Black group in the upper right has very little room for eyes, and is probably dead where it stands, as well.
It's worth noting at this point that I am far enough ahead that I don't need to really try hard to eat into Black territory. Also, note the marked White stones on the left. These are in excellent position to move up along the side, provided that I keep sente.