* 공식 홈페이지 : http://home.no.net/zamunda/

Neutreeko is a simple game played on a board with 5 * 5 squares, although it is playable on any rectangular board with at least 3 squares in each direction. The rules are fairly similar to those of Dao, but the two games are very different in terms of, for instance, the amount of neutral positions, and the existence of positions with a forced win hidden many moves ahead. Neutreeko was originally based on Neutron and Teeko (hence the name).

각 플레이어들은 흑색과 백색말 각각 3개씩을 준비한다. 게임 시작 전에 다음과 같이 말들을 위치시킨다:

검정이 먼저 둔다. 말을 움직이는 방법은 체스의 퀸과 같이 대각선이든 수직 수평이든 원하는 방향으로 직선으로 움직일 수 있다. 단, 중간에 멈춰서는 안되고 갈 수 있는 한 멀리 움직여야 하며, 다른 말을 건너뛸 수 없다. 예를 들어, B1에 위치한 말은 A1, C1, A2, B4로 움직일 수 있다. 번갈아가면서 계속 자신의 말을 한개씩 움직이면서 게임을 진행하면 된다.

게임의 목적은 자신의 3개의 말을 (대각선이든, 수직, 수평으로 일렬이든, ㄱ자형태의 직각이든 간에) 연결되어있는 상태로 만드는 것이다. For instance, if Black starts with C4-C3, White plays D5-D2 and wins:

Black can not stop the double threat B5-B2/B5-E2. One wrong move can often be fatal.

Roughly 3% of all possible positions are neutral, including the starting position. (In comparison, almost 4 out of 5 Dao positions are neutral.) More precisely, there are 104,660 neutral positions among the 3,468,080 legal positions where Black (say) is to play. (Positions where the next player has already won are excluded.)

In other positions, the forced win or loss can often be pretty elusive. The most extreme case is the following position:

It is Black's turn, and he can win, but not in less than 51* moves if White plays perfectly (* that is, 26 moves by Black and 25 by White). The 44 version allows for up to 33 moves. In Dao, the maximal length for perfectly played non-draws is only 11 moves.

만일 계속 같은 수가 반복되어 나타나면, 3번이상 나타났을 경우 비겼다고 판정하고 게임을 종료한다.

Neutreeko seems to be a rather tactical game, but there are a few strategic points one may want to keep in mind. It is often an advantage to occupy at least one of the squares C1, A3, C3, E3 and C5, and a disadvantage to occupy corners. Perfect play often involves one player forcing the other into a corner at some point.