Popl7

### Keybase proof

I hereby claim:

  * I am popl7 on github.
  * I am popl (https://keybase.io/popl) on keybase.
  * I have a public key ASDgd555Ut4LTQ1_trq_2jRIvlMEW4sZ4YzeTGwE1fDvHwo

To claim this, I am signing this object:

Popl7

(ns minesweeper.main)

;; solution by Ovidiu Ionescu and Steven Thonus

(defn field [cols rows bombs]
  (let [width (min cols rows)
        area (* cols rows)
        free (- area bombs)]
    (or
     (>= free (* 2 width))