Brandubh 7x7

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Hagbard
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Re: Brandubh 7x7

Post by Hagbard » Sun Aug 14, 2016 10:00 pm

More Brandubh balances.

The Brandubh 7x7 game balance is at the moment measured to +1.34 (setup Brandubh cross 7x7).
To ensure that there aren't other setups with a finer balance, two alternative setups were tested: Brandubh cross no throne and Brandubh circle no throne, both without a throne.

Game balance results are:

Code: Select all

x . . b . . x
. b . . . b .
. . . w . . .
b . w k w . b
. . . w . . .
. b . . . b .
x . . b . . x
Brandubh circle no throne 7x7, balance -2.00 (15 games)

Code: Select all

x . . b . . x
. . . b . . .
. . . w . . .
b b w k w b b
. . . w . . .
. . . b . . .
x . . b . . x
Brandubh cross no throne 7x7, balance -2.75 (15 games)


So, best Brandubh setup is still the Brandubh cross 7x7, game balance +1.34
Last edited by Hagbard on Thu Mar 23, 2017 10:32 pm, edited 1 time in total.

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Hagbard
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Re: Brandubh 7x7

Post by Hagbard » Thu Jan 05, 2017 9:09 am

Summary on the Irish Brandubh:
http://aagenielsen.dk/brandubh_summary.php

mccluskeyp
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Re: Brandubh 7x7

Post by mccluskeyp » Tue Apr 17, 2018 8:28 pm

Question on corner captures in Brandubh. Below is an example.

1. There is an Attacker on square C1.
2. The King moves B2-B1.
3. A second Attacker moves B4-B2.

Does the second Attacker's move, B4-B2, capture the King in Brandubh? The King would be captured in Old Hnefatafl.

Thanks,
mccluskeyp

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Hagbard
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Re: Brandubh 7x7

Post by Hagbard » Wed Apr 18, 2018 9:59 am

mccluskeyp wrote:
Tue Apr 17, 2018 8:28 pm
Question on corner captures in Brandubh. Below is an example.

1. There is an Attacker on square C1.
2. The King moves B2-B1.
3. A second Attacker moves B4-B2.

Does the second Attacker's move, B4-B2, capture the King in Brandubh? The King would be captured in Old Hnefatafl.

Thanks,
mccluskeyp
In your example the king is safe and will in his next turn move to A1 and win.
In Brandubh the king is not captured by surrounding as is the case in Old Hnefatafl, and so the second Attacker's move B4-B2 has no effect.
In Brandubh the king is captured from 2 sides, and so the capturing attacker must move to C1 and capture the king against the corner.

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Hagbard
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Re: Brandubh 7x7

Post by Hagbard » Wed Apr 18, 2018 10:26 am

Hagbard wrote:
Wed Apr 18, 2018 9:59 am
In Brandubh the king is not captured by surrounding as is the case in Old Hnefatafl, and so the second Attacker's move B4-B2 has no effect.
In Brandubh the king is captured from 2 sides, and so the capturing attacker must move to C1 and capture the king against the corner.
Many years ago Adam, Tim and I had a discussion about how to interpret these two styles of capturing. We came to this way of seeing it:
Capturing from 4 sides models capturing the king alive, for demanding of ransom etc.
Capturing from 2 sides models killing the king, the same way soldiers are killed.

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