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Havannah

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The Havannah-playing program Lajkonik is now open source.
A Havannah-playing bot
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Havannah

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A cool holiday gift from TRMPH. Thanks!
 
TRMPH's Havannah Board (http://www.trmph.com/havannah/board) and Hex Board (http://www.trmph.com/hex/board) can now export PNG images so that you can directly embed them in blog posts or forums.

Click the "Share image HTML" button to get embeddable HTML code or click the "Share image URL" button to get a direct link to the PNG.

By default, only the last move is highlighted. If you change the last parameter of the image URL from "-1" to "-N", the last N moves will be labelled. See the following example:
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Havannah

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Tony - Lajkonik 1 - 0 
Game played at 3rd Hexx6 tournament, 13 July 2013 in Hilversum 
At move 67 Lajkonik playing white ignored the threat at 68, which gives Tony playing black a small advantage. 
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Havannah

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Here is yet another way to see the games from the Challenge.
 
The 2012 Havannah Challenge is over! Christian Freeling beat the bots in seven of the ten games played over five days. Check out all the game records at http://www.trmph.com/havannah/event/hvc2012 +Havannah 
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Havannah

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Result of the Havannah Challenge 2012

In 2002 Christian Freeling put out a challenge that Havannah programs would not be able to beat him even once in a ten game match on a base-10 board, in the next ten years. From 15 to 19 October 2012 this 'Man vs Machine' Havannah Challenge took place, against three talented program(mer)s:
Timo Ewalds with Castro
Marcin Ciura with Lajkonik
Richard Lorentz with Wanderer

They won 3 out of 10 so the winning programmers receive a prize of €1000 that came with the challenge.

Castro and Lajkonik both played four games, while Wanderer played two. 
Lajkonik won two games playing black in one, Castro won the last one with white. 
The prize money is split evenly between both their creators. 

The match was played in good spirit - the few technical problems were overcome easily in consultation with all involved. 
And all games were very exciting.
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This was a fun week! Congratulations to +Timo Ewalds for the well-deserved victory of Castro. Kudos to +christian freeling for the guts to propose the challenge and to the senior council for organizing it, in particular to +Ton van der Valk for his time spent on the organization, publicity, and game analyses.
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Havannah

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 Overview of the results of the Havannah Challenge 2012

The rounds and pairing (all times are CET)

1. Monday       15 Oct. 11:00 Lajkonik - Christian Freeling   0 - 1
2. Tuesday      16 Oct. 11:00 Christian Freeling - Lajkonik   0 - 1
3. Tuesday      16 Oct. 13:00 Christian Freeling - Castro     1 - 0
4. Tuesday      16 Oct. 16:00 Christian Freeling - Wanderer 1 - 0
5. Wednesday 17 Oct. 14:00 Castro - Christian Freeling      0 - 1
6. Wednesday 17 Oct. 16:00 Wanderer - Christian Freeling 0 - 1
7. Thursday     18 Oct. 11:00 Christian Freeling - Lajkonik   1 - 0
8. Thursday     18 Oct. 14:00 Christian Freeling - Castro     1 - 0
9. Friday         19 Oct. 11:00 Lajkonik - Christian Freeling   1 - 0
10. Friday        19 Oct. 14:30 Castro - Christian Freeling     1 - 0

The final result:  Christian Freeling - Computer Programs     7 - 3
DGT - electronic chess boards, electronic chess clocks, digital game technology, electronic game clocks
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Havannah

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In an exciting game Christian Freeling showed himself most human by prematurely ending a very close game by a twitchy finger. Luckily this did not decide the entire match. So Lajkonik against Freeling ends up 2 - 2. The comments show that Freeling missed a few chances to use his ring threats more effectively. 
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Have them in circles
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Michel Pineau's profile photo
Frederic Darnel's profile photo
Shuwa Takagi's profile photo
GUCHI YAMA's profile photo
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Havannah

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I have kept it in the closet for 4.5 years. Today, I finally uploaded my LaTeX package havannah to CTAN: https://www.ctan.org/pkg/havannah
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Havannah

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Another cool gift from TRMPH. Thanks!
 
Analyze and share Havannah games with this online Havannah Board: http://www.trmph.com/havannah/board

Key features:
* Havannah game importer for littlegolem
* Shareable permalinks
* Board sizes from 4 to 10
* Swap move support
* Reversed move list for fast backtracking
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Havannah

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Thanks to TRMPH for putting these videos on YouTube!
 
Click the following link to watch the entire playlist of the Havannah Challenge on YouTube (best viewed in 480p):
Human vs Computer Havannah Challenge 2012 - Game #1 - trmph
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Havannah

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Christian Freeling analysing his game against Lajkonik at tuesday 16 october 2012 after his first loss.
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Havannah

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In the last game of the match over ten games Castro showed his strongest play. Christian Freeling playing black started too defensively in the beginning of the game. When Castro spread out a huge net of rings black could easily defend, but white had gained a decisive lead in the race. Christian Freeling had to resign for the second time today. 
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Have them in circles
64 people
Michel Pineau's profile photo
Frederic Darnel's profile photo
Shuwa Takagi's profile photo
GUCHI YAMA's profile photo
Jonathan Jonas's profile photo
Frans Faase's profile photo
Timo Ewalds's profile photo
Justin Blank's profile photo
Jameel Abdul Jaleel's profile photo
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A fascinating abstract board game
Introduction
Havannah is an abstract board game invented in 1976 by Christian Freeling, a Dutch game designer. Initially it was played in the game club Fanaat at the University of Twente in the Netherlands. In early 1980s, Havannah sets were produced by the German game company Ravensburger. The name of the game was chosen by blindly opening a dictionary and tapping a finger (actually it said Havana but that looked too much like a cigar).

The game is played on a hexagonal board composed of hexagonal cells. Usually, the boards have from 5 to 10 cells to a side. One player is White, the other is Black. White starts, then players alternate. In each move, a player puts a stone of his colour on the board. Stones once put on the board are never captured or moved. The first player who builds from his stones a connected chain of one of three kinds, wins the game. The winning structures are:

* A ring that encircles one or more cells (they can be empty or occupied by either player's stones, in particular six stones that surround a stone of the same player form a ring, too).
* A bridge that connects any two corners of the board.
* A fork that connects any three edges of the board (corners do not count as edges).

When the entire board is filled without creating a winning chain, the game is a draw. In practice, draws are extremely rare, especially on larger boards.

Havannah attracted the attention of programmers when its designer announced that he would pay 1000 to the author of a program that beats him in at least one game out of ten on a size-10 board within 10 years. Freeling paid the prize in October 2012 when his match with computer opponents ended in a 7:3 score for humanity.