helpmate, helpmeet (noun)
a helpful partner
A person who supplies help or companionship.
A wife or spouse.
A recreational problem in chess in which both sides cooperate to achieve a specific goal.
A helpmate is a type of chess problem in which both sides cooperate in order to achieve the goal of checkmating Black. In a helpmate in n moves, Black moves first, then White, each side moving n times, to culminate in White's nth move checkmating Black. Although the two sides cooperate, all moves must be legal according to the rules of chess. The example problem to the right is a helpmate in eight by Z. Maslar, published in Die Schwalbe in 1981. The solution is: 1. Kf3 Kd3 2. Bb3 Kc3 3. Ke4+ Kd2 4. Kd4 Ke2 5. Kc3 Nb4 6. Kb2 Kd2 7. Ka1 Kc1 8. Ba2 Nc2#