TRMDPE -- Igo Hatsuyoron problem 120 -- Interactive tool

This page is a supplement to the page about this classic problem, maintained by Thomas Redecker, for the Deutscher Go Bund. Sensei's Library has more links to further analyses of this problem.

Please Note: the main web site has more detailed comments. The files used here do not show the latest research which is still going on (early 2011).

This page is powered by EidoGo – a Go client, and editor (and much more!), very easily included in your web pages. Download your own version, or check out the notes on EidoGo at Sensei's Library.

Problem 120 -- you can view, edit, and save

N.B. The interactive board uses Javascript. Please make sure that you have enabled this.

N.B. When a comment says "[ see variation ]" you will have to click back once, and then select the appropriate (later) variation.

The Main line -- June 2008, with comments

Variations afterBad Shape with #67 at S13 -- January 2011, no detailed comments

This is an example of the advanced use of EidoGo: Click here to go to move 67 directly.

Note that this game-record looks only at those variations following the new, bad shape, move at S13 with move #67, and uses the new, proposed, line until that point.

How to View, Edit/Explore, and Save

To move around game record:

There are several methods.

• Use the arrow keys in the viewer, or on the keyboard.
• Use the red slider – move number is shown just above.
• Select a variation – numbered squares &ndash either on the board, or at right.
• Select moves using the Game-Tree displayed at bottom right – numbered B & W stones. This is enabled by having "showNavTree: true," in the script. It is not known what all the possible show options are.
• Select Tool: → Jump to Move, and then click on the point (empty, or occupied!). You will then jump to the first occurrence of that move, in the earliest variation in the game record.

To change the game record – e.g. try new variations:

• With "Tool Play" selected at right, click on an empty board point to add a move to the end of a variation, or to start a new variation.
  It seems that you cannot permanently add moves in the middle of a variation, or game-record. They have to be added as stones, instead.
  Sometimes, if you are lazy, you may want to do this if you have forgotten to include an exchange earlier in a sequence, and now want to check the possibilities as if you had played the exchange earlier!
• Remove Black/White stones, or variations – DANGEROUS: Use Tools Black/White stone, then click on an existing stone.
  • If the stone is the current move, then you will be warned "You've removed all properties from this position. Delete this position, and all sub-positions? [ OK ] [ Cancel ]". Beware – answering "OK" will remove all the rest of that branch/variation, including all sub-trees/sub-variations from then onwards.
  • If the stone is not the current move then the deleted move/stone will no longer be displayed when the current move is current again. However, it is still in the game-record, and will appear, as usual, at all other points in the game record.
  It seems that you cannot permanently remove moves in the middle of a variation, or game-record. However, you can remove the stones. Sometimes, if you are lazy, you may want to do this if you have played an exchange earlier in a sequence, and now want to check the possibilities as if you had not played the exchange earlier!
  To mimic deletion of moves, the work-around is to do Tools: Black Stone, and Tools: White Stone, at the correct point in the game-record – these will not count as moves in the sequence, but will be displayed as stones at all points after this in the game-tree! :-)
• Add marks/labels – Tool: triangle, square, cross, number [autoincrement], or letter [autoincrement].
• Lowlight areas with "Tools: Dim" – helpful with comments
• Clear marks/labels, or "Dim": Tools: Clear Marker
• Add Black/White stones – use Tools: Black/White Stone, and click on point.
• Apparently, cannot add comments with this tool, on this page.

You can also use "Download SGF" to download the SGF file to your computer,including edits just made by you.

This page is powered by EidoGo – a Go client, and editor (and much more), easily included in web pages. Download your own version, or check out the notes on EidoGo at Sensei's Library.