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Goban dimension questions
Posted: Thu Dec 25, 2014 1:30 am
by chopper
According to sensei's library the dimensions of a goban is as follows:
Code: Select all
Dimension SI Imperial Japanese
(mm) (inch)
Board width 424.2 16 23/32 1.4 shaku 尺
Board length 454.5 17 29/32 1.5 shaku 尺
Board thickness 151.5 5 31/32 0.5 shaku 尺
Line spacing width-wise 22 7/8 7.26 bu 分
Line spacing length-wise 23.7 15/16 7.82 bu 分
Line thickness 1 1/32 0.3 bu 分
Star point marker diameter 4 5/32 1.2 bu 分
Stone diameter 22.5 29/32 7.5 bu 分
As the line isn't included in the line spacing, in order to fit the goban width, we'd have the following result:
18 * 22mm (the squares) + 19 * 1mm (the lines) = 415mm
total border width = ( board width - lines+square width ) = ( 424.2 - 415 ) = 9.2 mm
That leaves a given border width of 9.2/2 = 4.6 mm
Are the edges of a goban really only 4.6 mm to the first line? Can someone measure this to confirm?
Re: Goban dimension questions
Posted: Thu Dec 25, 2014 3:47 am
by Cassandra
"Line spacing" is measured between identical parts of two neighboured lines.
Therefore, the thickness of the lines does not matter.
Re: Goban dimension questions
Posted: Thu Dec 25, 2014 6:03 am
by fanfan
Hello,
Goban size can vary more than you expect.
My goban: shinkaya (japanese maker), thickness: 30mm, total width: 438mm, total length: 469mm, top and bottom edges: 19mm each, left and right edges: 14mm each.
Re: Goban dimension questions
Posted: Thu Dec 25, 2014 9:42 am
by chopper
Cassandra wrote:"Line spacing" is measured between identical parts of two neighboured lines.
Therefore, the thickness of the lines does not matter.
The dimensions specify a line thickness of 1mm.
Re: Goban dimension questions
Posted: Thu Dec 25, 2014 9:45 am
by chopper
fanfan wrote:Hello,
Goban size can vary more than you expect.
My goban: shinkaya (japanese maker), thickness: 30mm, total width: 438mm, total length: 469mm, top and bottom edges: 19mm each, left and right edges: 14mm each.
Did line thickness, line spacing width and lengthwise stay the same besides the more generous edges?
Re: Goban dimension questions
Posted: Thu Dec 25, 2014 11:25 am
by fanfan
chopper wrote:Did line thickness, line spacing width and lengthwise stay the same besides the more generous edges?
Line thickness are the same in both directions (about 1mm). Line spacing widthwise and lengthwise cannot be the same. They can be computed using goban width and length, respectively (438mm-14mm-14mm)/18=22.77mm for line spacing widthwise and (469mm-19mm-19mm)/18=23.94mm for line spacing lengthwise (from line middle to line middle).
I think that the edge lengthwise width (19mm) is too generous: 14mm or 15mm are probably better.
Re: Goban dimension questions
Posted: Thu Dec 25, 2014 1:06 pm
by chopper
fanfan wrote:Line thickness are the same in both directions (about 1mm). Line spacing widthwise and lengthwise cannot be the same.
yes, I was just wondering if any other dimensions were different on your board aside from the over all bigger size, resulting in the bigger edge.
fanfan wrote:
I think that the edge lengthwise width (19mm) is too generous: 14mm or 15mm are probably better.
That's good input. Thanks
Re: Goban dimension questions
Posted: Mon Mar 02, 2015 11:08 pm
by yang738
my goban size is 46cm * 49cm .