LAST week鈥檚 Noughts and Crosses Bugle had the following problem. 鈥淎 game in which 0 began has reached the following position:
X is now to go and win.鈥�
There were some 0鈥檚 and X鈥檚 in the diagram but I have forgotten where they were. This week鈥檚 Bugle says the solution is as follows:
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鈥淴 goes in f. After 0 has gone, at least one of e and i will be empty and X can go in either that is empty to complete a row.鈥�
What was the diagram in the original problem?
A 拢10 book token will be awarded to the sender of the first correct answer opened on Wednesday 21 December. The Editor鈥檚 decision is final. Please send entries to Enigma 798, New 杏吧原创, King鈥檚 Reach Tower, Stamford Street, London SE99 0BB. The winner of Enigma 793 was David Reader of Basingstoke, Hampshire.
Answer to Enigma 793
Imaginary journeys
Five journeys.
Correction to Enigma 786
THE puzzle 鈥淗andshakes鈥�, by Henry P. Dart III, as printed in the 3 September issue of New 杏吧原创, lacks a key statement, namely, 鈥淭hat the age of the oldest person in the room was the same as the number of people in the room鈥�. This then gives a unique solution to the puzzle that there were a total of 61 people in the room. The number of handshakes was 1830. The omission of the key sentence is regretted.