Five stones on the third line in the corner  

This is the Five stones on the Third line in the Corner position and according to Segoe Kensaku's Go Proverbs Illustrated it is alive as it stands.

If it was not in the corner but on the side it would be the Five stones on the third line its status would depend on who moves first

More recent investigations somewhat dispute Segoe's conclusion, but no final conclusion has been reached yet.

Everything here is therefore to be taken as work in progress not as final conclusions.

We start with an short overview of the most easy variations. under Old page pre WME more variations are found

Segoe's conclusion  

Segoe's Go proverbs illustrated gives only this diagram to show that this group is alive.

After the group is undeniably alive. But questions are raised about the first move in this sequence

(See also http://www.lifein19x19.com/forum/viewtopic.php?p=30778#p30778)

Depending on who plays next in this corner White lives with 4 to 5 points of territory

New research for move 1

The recent investigations attack with another

Directly to the 1-2 point

the vital point?  

is at a vital point in this shape. White can try a lot of moves.

The most simple continuation that results in a living group is white c a move that leads to a seki in gote

for the variations following after a, b and d look at the old page below

White c  

White c results in a seki in gote -- NOT!.

We do not know if Segoe had this in mind. White is alive, but has lost his territory.

And to be honest it is a bit disappointing for White and so this is better for Black than Segoe's conclusion.

The Descent (bad for Black)

The descent  

An other is the descent but if white takes the vital point with he is alive.

White defends

White defends  

Although it is still uncertain if White needs to defend this shape followed by are one way to do so. (there are other options) Notice that if black plays continues with and White needs to defend on or any of the points a because after it is a rectangular eight in the corner

See also

• Discussion over this shape with other variations on Life in 19 x 19
• RTGProblem85, RTGProblem86, RTGProblem87
• Four stones on the third line in the corner