Ключевые слова: challenge, checkers, coalition, color, colour, colours, cone, contact, counters, decision, diversity, election, forecast, forecasting, game, group, halma, jump, leadership, majority, minority, move, opportunity, opposition, option, pawn, pawns, pawnstyle, pieces, player, poll, prognosis, proportion, quantity, ratio, relationship, result, selection, set, setup, strategy, tactic, tactics, teamwork, turn, vote,