The play of four cards, one from each player's holding was a trick, and the suit of the card played first in a trick was the suit led.
 The distribution of the four suits on the cards held by the four players was as follows:
Wilson's holding -- C H D Xavier's holding -- C S S Yoeman's holding -- C H H Zenger's holding -- S D D[2a] A player had to play a card in the suit led, if possible, at each trick.
[2b] If [2a] is not possible, he had to play a high suit.
[2c] If [2b] is also not possible, then he could play any card.
 Each of the remaining three tricks contained in part: the suit card led, just one other card in the same suit as led, and a high suit card which won the trick.
 A player who won a trick had to lead at the next trick.
Which suit was the high suit?