Following Peter Taylor's answer to The smallest crossword

 >   It's not hard to construct a 1x1 crossword:   . . .

A single-cell crossword could be called atomic.

  Surreal:    |10     |     Across          Down           Up          Diagonal
 (no black    |       |    ------------    -----------    --------    --------------
  squares)    |_______|    10. A cross.    10. __-ray.    10. Ten.    10. Two

    Zen:       #######                                     Behind
 (one black    #######     ------------    -----------    --------
   square)     #######                                    ?. _____


closed as unclear what you're asking by Deusovi, DrunkWolf, GentlePurpleRain, Zerris, mmking Jan 1 '16 at 21:08

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ Voting to close as "unclear what you're asking" for the "Zen" crossword. $\endgroup$ – Deusovi Jan 1 '16 at 16:35
  • 2
    $\begingroup$ I don't vote to close, but the question is totally unclear to me. Actually there is no question at all... $\endgroup$ – klm123 Jan 1 '16 at 16:37
  • $\begingroup$ @Deusovi correctly answered the "Surreal" puzzle. Deusovi and kim123 responded appropriately differently to the "Zen" puzzle. Congratulations! $\endgroup$ – humn Jan 1 '16 at 20:03
  • 2
    $\begingroup$ @Deusovi This should be reopened. Black squares on crosswords have no content, so a puzzle with just one square has no content if that square is black. I think that's the allusion to 'zen' and fits the OP's comment above. Also, zen is famous for the 'questionless' question(s). $\endgroup$ – Lawrence Jan 1 '16 at 23:08

The answer to "Surreal" is

X. X is a cross, ten in Roman numerals, and written as two diagonal lines; X-rays are a type of electromagnetic wave.


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