David Parlett's Katarenga games

TROIKA

A three-in-a-row game for two

Start. The Example game board starts empty. This a game of placement only, with no movement or capture.

Object. To be the first to make a troika – that is, a line of three pawns of your own colour in a row, whether horizontal, vertical, or diagonal. They need not be adjacent, but may be any distance apart and lying at any angle relative to the board. For example, this illustration shows Black winning with the line 8-12-10.

Play. You each in turn place a pawn of your own colour on the board. The first pawn may be placed anywhere, and each subsequent pawn must be placed en prise to the previous one. You win the game by making a line of three, as described above.

You may not immobilise your opponent, and must therefore retract any move that allows of no legal continuation. If neither of you has made a line of three when all 16 pawns are down you may declare the game a draw.

Alternatively, play continues with each of you in turn removing one of your pawns from its current position and placing it en prise to the previous one as usual. Continue till one of you eventually wins or you both die of boredom.

En prise

moves

B is en prise to A if can be legally captured by A. In the strip above the yellow 'bishop' pawn is en prise to the red 'rook'and the green 'knight' to the blue 'king'. A pawn moves from red like a rook, from yellow like a bishop, from green like a knight, from blue like a king. From red and yellow it can move any distance up to but not beyond the next square of the same colour in line of travel.) (Return).

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