
(;AP[GOWrite:2.3.48]GM[1]FF[4]CA[UTF-8]ST[2]SZ[19]PM[2]FG[259:]PB[ ]PW[ ]GN[ ]
;B[tt]TR[dp]L[pd][pq][jj]C[I hope you have deduced from the empty board that this is move 2 of a game
and Black passed for his first move. Various plays are listed below, with scores
out of 10.

Solutions
1. Any reasonable move, such as A\: 5 points.

2. A move in the lower right corner, such as B, scores a little extra for pedantic
attention to etiquette. You have realised that if Black had placed a stone it
would have been near the triangled point, so you ‘replied’ in the appro-
priate corner\: 5 1/2 points.

3. C\: I assume your intention is to play mirror Go, while receiving komi\: 8 points.

4. Pass. This ends the game and you win by komi\: 10 points
.
This puzzle was inspired by a recent computer Go tournament, in which one
of the players always passed on move 1 as Black, for reasons which are not
currently understood. Only one of its dan-rated opponents passed on move
2, the other four just played ordinary moves in corners.]
)
