Kotra is an Icelandic kind of play of the Backgammons or trick TRACK.
Like the today's Backgammon Kotra is played too secondly with 30 stones (15 black, 15 white) and two cubes on a Spielbrett. The Spielbrett is divided in the center by the bar in such a way specified. According to the source of light (in the Middle Ages usually a candle) one differentiates an exterior board and an internal board. Altogether four quarters are differentiated by the against-intimate adjustment of the points/teeth.
On each player side are 12 fields or points/teeth. White plays from field A after field x, black from field m after field l. Contrary to the usual Backgammon white begins with all 15 Spielsteinen on point/tooth A and black started with all stones on point/tooth m to see (as in fig. 1). The last quarter, the respective home board (s-x for white and/or g-l for black), applies to reach it with all 15 stones.
Each player throws a cube. The highest number begins, whereby the first course the eye numbers takes place accordingly. With same eye number again one In the following cubes the players alternating with both cubes.
The respective player throws two cubes. When pulling the initial position to the home board it is possible both with two stones the two eye numbers to advance (e.g. with 3: 5 a stone 3 and a further stone of 5 fields) and with a stone first the number of eyes one and then the other cube to pull accordingly (only 3 fields and then 5 fields). One cannot sum the two results up and move the stone with a course. It can be landed only on "free "fields (vacant, with own stones or an opposing stone, which can be struck, occupied), therefore both fields must be free ""also with the advance with only one stone. The sequence of the two individual courses is all the same. This makes possible for the player if one of the fields is occupied to complete nevertheless the course (to advance e.g. if field 3 is occupied, only 5 fields and then 3 fields). Two equal numbers are (e.g. 5: 5), one of a Pasch and the player speak may the double field number advance (thus instead of 10 altogether 20). Here it is left to the player whether it pulls to two, three or four stones with one, as long as the individual landing fields are free "".
If a player advances on a field, on which an individual opposing stone (bare stone) stands, this stone is considered as struck and to the center of the Spielbrettes (bar) is set. The player is not obligated however to strike, if he has still different stones for advance for order. The opposing player can make only then further courses if/the struck (n) stone (e) is again in the play/is. The imprisoned taken stones must from the bar again in the play, on which own starting board are brought. That can mean long waiting. The stones which can be reinserted must be placed on a free point/tooth of the starting board. The player can imprisoned taken stones neither on fields, which are occupied by its own already, nor on such, which are occupied by two or more hostile stones, back in the play bring can. As the first field with the reinsertion the launching field (A for white and/or m for black) is counted. If in the starting board no landing field "" is free purges the throw. In addition the player has the possibility of bringing two struck stones with a throw back in the play.
Who can out-play all 15 stones over field x (for white) and/or l (for black) from the home board as the first, is the winner. The 15 stones must be however everything in the home board before be cleared away may. Necessarily a stone can being out-played also with a higher eye number than, if on the fields with no more stone stands the number, which corresponds to the eye number, or higher numbers. E.g. 5 one and neither on the 5. or 6. Stones are appropriate for point/tooth before the goal, then also a stone can be out-played by the fourth point/tooth. However still another if stone lies on the sixth point/tooth, then this must be set first to the first point/tooth before the goal.
1. a player a Pasch (to two eye numbers equal) with the first throw, can be moved only one stone, if no 6: 6 and a special rule is thrown into force steps, after which four stones must be moved after g (white) or s (black).
2. While these four stones remain together on g and/or s, they are vulnerable like an individual bare stone. If they are struck, they all from the Spielbrett are to be taken to and must in the usual way back in the play be brought. Once if one of these stones was moved, the other three against the attack with exception of rule 5 is protected.
3. A player may not pull a stone from the opposing side of the board, until he moved five away Spielsteine of the starting position.
4. A player cannot do no more than one stone on point/tooth platzieren (except according to rule 2), to it Spielstein on the most distant field on the opposite side of the board (l for white or x black) stands has. Then it may place two or more stones on the points/teeth of the own and opposing side of the board.
5. A player may not place a stone on a field, on which two or more opposing stones are, it is, it is impossible, a block/a sequence hostile Spielsteine to be happened. If it cannot land on a field and the stones on this strike, e.g. if white had Spielsteine on s, t, u, v, w and x, could black pass even with the throw 6. Therefore it can place itself on each field of the eye number accordingly. There therefore unklug, two or more stones on six sequential fields stands to have, since one can lose so directly several stones with at one time.
6. If possible a player must play the indicated number four times when throwing two equal eye numbers (Pasch). (see alteration in rule 1) profits of the play
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