The Genius puzzle this month is set by Qaos
There was a fairly short preamble – Nine letter clashes between across and down solutions are to be resolved, using a consistent formula, creating 18 valid new words. These nine letters have something in common, which will indicate the letter to be entered in the central square of the grid.
So no gimmicks in the clues, they’re all straightforward. The problem is that on many occasions the crossing letters are not going to help.
Fortunately, I got off to a good start in the NW corner of the grid and came up with a clash fairly quickly. RECOINS at 10 across clashed with SERGEANT at 2 down where the C and the G didn’t match. A bit of thought suggested that the clash could be solved with a J to give REJOINS and SERJEANT. So we have C (letter 3 in the alphabet) and G (letter 7) resolving to letter J (letter 10) giving us a fairly simple formula 3+7=10. Let’s hope the rest resolve so easily.
The next clash up for me was PRECIOUS at 20 across failing to match with RESOLVE at 16 down. V (letter 22) looks a good bet for the new letter so let’s see what we have – C:3 + S:19 giving 3+19=22. Bingo!
The formula seemed fairly clear now and the solve proceeded fairly smoothly
When the grid is first filled and the clashes are in place the grid looks like this:
In each clash, the Across letter is shown before the Down letter.

The nine clashes were as follows
| Across | Down | Across letter clash : Value | Down letter clash: Value | Solution letter | New Across entry | New Down entry |
| 9: AHEAD | 7: SLATE | D:4 | L:12 | 16:P | AHEAP | SPATE |
| 10: RECOINS | 2: SERGEANT | C:3 | G:7 | 10:J | REJOINS | SERJEANT |
| 12: DEATH | 12: JEST | D:4 | J:10 | 14:N | NEATH | NEST |
| 13: DEIONISE | 5: EPISODE | I:9 | D:4 | 13:M | DEMONISE | EPISOME |
| 17: GANDER | 9:ALIENED | A:1 | D:4 | 5:E | GENDER | ALIENEE |
| 20: PRECIOUS | 16: RESOLVE | C:3 | S:19 | 22:V | PREVIOUS | REVOLVE |
| 23: LOVED | 23: AUTISM | L:12 | A:1 | 13:M | MOVED | MUTISM |
| 25: INDULIN | 21: ROOTER | D:4 | O:15 | 19:S | INSULIN | ROSTER |
| 29: CALMSTONE | 22: SANTIR | L:12 | I::9 | 21:U | CAUMSTONE | SANTUR |
Entering the Solution letter in the grid gave us this display:
This then gives us a sequence of letters PJNMEVMSU
After a bit of head scratching a bit of research, these resolved to the first letters of the Planets or Dwarf Planets in our Solar System – Pluto, Jupiter, Neptune, Mercury, Earth, Venus, Mars, Saturn and Uranus
The central letter is therefore S for SUN
Further study of the grid show that their relative positions with reference to the centre cell are in relation to their ‘distance’ from the Sun.. You could quibble that Earth looks a bit closer than Venus, but that’s just nitpicking. It really is a great piece of grid construction.
Just showing the SUN and the Planets the grid is as shown below.
The submitted grid should be like the middle one of the three above, with the letter S in the central square.
I noted the phrase ‘Out-of-this-world conclusion’ in the clue at 12 across. I don’t whether this was a nudge to the end game or whether it was just a coincidence.
This was an enjoyable puzzle where I started quickly and then slowed down a bit in the middle before speeding up again towards the end of the grid fill. It took a little while to crack the end game but it was very satisfying when the penny dropped.
The clues were not too difficult which I think has to be the case when clashes are to be encountered.. I liked the clue that referred to the ‘Centre of Birmingham’ for the NEC and I also liked the rather contorted one involving PINOCCHIO even though I query the order of CO in Carbon Monoxide.
Thanks to Qaos.
| Across | |||
|---|---|---|---|
| No. | Clue | Wordplay | Entry |
|
8
|
Fellow lied about mistake on expedition (5,4)
|
F (fellow) + an anagram of (about) LIED + TRIP (mistake) F IELD* TRIP |
FIELD TRIP (expedition)
|
|
9
|
A male advanced and finally travelled forward (5)
|
A + HE (male) + A (advanced) + D (last letter of [finally] TRAVELLED) A HE A D |
AHEAD (forward)
|
|
10
|
Holds company in and makes money again (7)
|
CO (company) contained in (in) REINS (holds) RE (CO) INS |
RECOINS (COINs again, esp by melting and passing again through a mint; makes money again)
|
|
11
|
King invades island retreating with the heart of Peter Pan (7)
|
(K [king] contained in [invades] ELLIS [ reference ELLIS Island in Upper New York Bay, gateway for immigration into the United States from 1892 to 1954]) all reversed (retreating) + T (central letter of [heart of] PETER) (S (K) ILLE)< T |
SKILLET (small, long-handled pan; frying pan in America) |
|
12
|
ET had out-of-this-world conclusion (5)
|
Anagram of (out-of-this-world) ET HAD DEATH* |
DEATH (conclusion)
|
|
13
|
Gods made noise to remove charge (8)
|
DEI (Gods) + an anagram of (made) NOISE DEI ONISE* |
DEIONISE (remove charged particles)
|
|
15
|
Up north, flag waved with line out – that’s funny! (6)
|
SALTIRE (loosely, the national flag of Scotland [up north], a white St Andrew’s cross on a blue background) excluding (out) L (line) SATIRE |
SATIRE (invective, wit and humour; that’s funny)
|
|
17
|
Trot? Horse comes back, look! (6)
|
(RED [communist; trotskyist; trot] + NAG [horse, especially a small one]) all reversed (comes back) (GAN DER)< |
GANDER (look or glance)
|
|
20
|
Before, Conservative promises to pay dear (8)
|
PRE (before) + C (Conservative) + IOUS (promises to pay) PRE C IOUS |
PRECIOUS (cherished; dear)
|
|
23
|
Enjoyed 50% of transference of powers being returned (5)
|
(DEVOLUTION [transference of power] excluding the final 5 of 10 letters UTION leaving 50% DEVOL] reversed (being returned) LOVED< |
LOVED (enjoyed)
|
|
25
|
Religious person divorces husband over nothing dyestuff (7)
|
HINDU (religious person) excluding (divorces) H (husband) + (NIL [nothing] reversed [over]) INDU LIN< |
INDULIN (any one of a class of coal tar dyestuffs)
|
|
26
|
Writes down: "Absent from Eastern society" (7)
|
NOT AT (absent from) + E (Eastern) + S (society) NOT AT E S |
NOTATES (writes down)
|
|
28
|
Men on board gain key town (5)
|
CREW (men on board a ship for instance) + E (musical key) CREW E |
CREWE (town in the North of England)
|
|
29
|
Church takes in donations in Northern Rock (9)
|
CE (Church of England) containing (takes in) (ALMS [donations] + TO + N [Northern]) C (ALMS TO N) E |
CALMSTONE (white argillaceous stone used for whitening hearthstones and doorsteps.)
|
| Down | |||
|
1
|
A service return from a great distance (4) |
A + RAF (Royal Air Force; armed service) reversed (return) A FAR< |
AFAR (from a great distance)
|
|
2
|
Drug injection given to strange, violent soldier (8)
|
E (ecstasy; drug) contained in (given to) an anagram of (violent) STRANGE SERG (E) ANT* Either E could be the one contained |
SERGEANT (army [soldier] rank)
|
|
3
|
Old Dutch delicacy is somewhat unusual (6)
|
O (old) + D (Dutch) + DISH (delicacy) O D DISH |
ODDISH (somewhat unusual)
|
|
4
|
Lost time and speed, regularly (6)
|
ERA (period of time) + SED (letters 1, 3 and 5 [regularly] of SPEED) ERA SED |
ERASED (destroyed; lost)
|
|
5
|
Incident in outskirts of Eastbourne party, drink, fall over (7)
|
([DO {party} + SIP {drink}] contained in [in]] EE [first and last letters of {outskirts of] EASTBOURNE]) all reversed (fall over) (E (PIS OD) E)< |
EPISODE (incident)
|
|
6
|
Countries are struggling with descending sizes? (6)
|
Anagram of (struggling) ARE + LMS (large, middle, small – descending sizes) REA* LMS |
REALMS (countries)
|
|
7
|
It’s hard to criticise (5)
|
SLATE (fine grained rock; a hard substance) SLATE |
SLATE (criticise) double definition
|
|
9
|
Being transferred towards heaven partly made Neil Armstrong (7)
|
ALIENED (reversed (towards heaven; down clue) hidden word (partly) in MADE NEIL ARMSTRONG) ALIENED< |
ALIENED (rare word for transferred
|
|
12
|
In Paris, I get way out at cricket with leg pull (4)
|
JE (French [Paris] for I) + ST (stumped; a way of being declared out at cricket) JE ST |
JEST (leg pull)
|
|
14
|
Grating woman not at home (4)
|
INGRID (woman’s name) excluding (not) IN (at home) GRID |
GRID (grating)
|
|
16
|
To finish puzzle again takes will power… (7) |
RE SOLVE (SOLVE again; finish puzzle again) RE SOLVE |
RESOLVE (willpower)
|
|
18
|
… but to video puzzle requires new commitment (8)
|
Anagram of (puzzle) TO VIDEO + N (new) DEVOTIO* N |
DEVOTION (commitment)
|
|
19
|
Centre of Birmingham supports party on Tues or Wed (7)
|
CON (Conservative party) + NEC (National Exhibition Centre located in Birmingham; Centre of Birmingham) + T (Tuesday – I can’t find this an abbreviation in a dictionary, but I have found it in a book of abbreviations and it’s fairly commonly used) CON NEC T |
CONNECT (unite; wed
|
|
21
|
American fan‘s broken rotor key (6)
|
Anagram of (broken) ROTOR and E (musical key) ROOTER* |
ROOTER (term for a [sports club] supporter [fan] in America)
|
|
22
|
Teacher picks up adult books for Persian instrument (6)
|
SIR (term of respect for a teacher) containing (picks up) (A [adult] + NT (New Testament [books]) S (A NT) IR |
SANTIR (Persian musical instrument resembling a dulcimer)
|
|
23
|
A helping of sauerkraut is Merkel’s condition (6)
|
AUTISM (hidden word in (helping of) SAUERKRAUT IS MERKEL’S) AUTISM |
AUTISM ( absorption in imaginative activity directed by the thinker’s wishes, with loss of contact with reality; an abnormality of childhood development affecting language and social communication; condition)
|
| 24 | "He lied to let carbon monoxide escape": Number 10 released to press (5) |
PINOCCHIO (storybook wooden puppet whose nose grew longer every time he lied) excluding (released) (CO [Carbon Monoxide] and IO [letters resembling the number 10) leaving behind PINCH To me we are releasing OC rather than CO as there is no indication that CO is reversed. Maybe this is an example of a lie? PINCH |
PINCH (press) |
|
27
|
Budgerigars, perhaps, fly up a short distance (4)
|
PETS (budgerigars are examples of birds kept as pets) reversed (fly up; down clue) STEP< |
STEP (short distance)
|


Hi Duncan
I presume you must be in the USA, like I am, or you are a light sleeper. Either way I am so impressed at the grids you have provided and the explanations. I too followed very similar lines of reasoning as you did. I got the letter substitution method after getting two of the crossed clues. After I had four I guessed that we were dealing with planets. That actually made it a fair bit simpler to get other clues as I could work backwards from target letters to identify what the clashing letter of an across or down clue was likely to be. I did not, though, note that the location of the letter for the planets [and I was very surprised to see Pluto there at all] was in respect of their relative distance from the sun. Very well spotted. I also agree with your comments about Carbon Monoxide. I am sure that must have been an error in the clue setting. It was actually my least favourite clue as it seemed a little clunky despite the lovely surface.
I was stuck on Calmstone/Caumstone for a long time. It was not in Collins, nor could I find it anywhere online, nor in Chambers until I eventually looked under Camstone. I am amazed that Chambers does not provide better cross-referencing.
You noted the possible hint to the theme from clue 12A. I also noted 16D where “To finish puzzle…” and the answer eventually becomes REVOLVE. Too neat to be just a coincidence. I did not, though, understand the logic between 16D and the run-on clue 18D. What am I missing?
A great blog and hats off to you. Also thanks to QAOS for an extremely entertaining and very clever puzzle.
Was it OK just to fill in the centre square with a yellow/orange crayon?
Amazing piece of setting-for once Chambers didnt fix it!
Thanks for time taken on blog duncanshiell and thanks Qaos.
Thanks Duncan – that’s a wonderfully detailed blog.
24dn was changed from “He lied about …” and I didn’t spot that this removed the reversal indicator during my proof reading, so my bad. I probably spent more time checking for alternative clash fixes/rules that would ruin the sequence of planets (dwarf or otherwise :-)).
Speaking of dwarf planets, I used THIS Solar System Simulator, which includes Pluto. I initially tried to use the current position of the planets, but found the letter clashes were too unevenly distributed around the grid. In the end, I went with rough distance from the Sun, together with a letter clash in every other row/column. Only the position of Mars proved extremely difficult to shift (ideally, to the middle of 23ac).
Best wishes,
Qaos.
I got completely stuck after filling about 1/3-1/2 of this and failed to get any more despite looking at it several times. Then, on Thursday morning, I picked it up again and polished it off in a sitting. I think I got back in via EPISODE, and wondered why that had seemed so difficult before. I was a bit thrown by the misedit in PINCH, but decided it must be right.
It wasn’t until I’d solved all the clues that I worked out what the rule was, but that gave me the N (not B or H) at 12, and I finally twigged they were the planets.
What an amazing construction this was (and beautifully blogged, btw, Duncan). I can’t imagine how one would go about creating this. I noticed, too, that the planets were (very nearly?*) correctly placed with respect to their relative distances from the Sun, but not those two lttle hints in the clues.
Btw, Duncan, there was no correct version of the grid to send in, because entry was by filling in a form with the original answer (I hope!) to each clue and specifying the central letter. Also M as a size stands, as I’m sure you know really, for ‘Medium’, not ‘Middle’ as stated (REALMS).
*Is Earth in fact sometimes closer to the Sun than Venus?
Hi Tony @4
As far as I know the Earth is never closer to the sun than Venus, and never has been. But Neptune is occasionally further away than Pluto. I recall this happening about a couple of decades ago, but have not looked it up to check exactly when.
I meant to add to my initial comment last night that I found entering the solution online at the Guardian almost as taxing as doing the puzzle. I had to check twice I had the correctly changed letters and that the letter count was accurate. I almost entered CAULMSTONE, which would have scuppered me. It is incredible the site still cannot go back to the full interactive grid, and that the crossword editor, yet again, failed to spot an error. Surely he could and should have helped QAOS notice the boob with 24D. What exactly does he do? As I mentioned earlier this clue was not my favourite. In retrospect part of the problem was me trying to remove NOX [as Number 10] from Monoxide, for far too long. It is incredible how you cannot shake off bad ideas more easily.
Well I’m off to the Bronx Botanical gardens in about an hour to see the Dale Chihuly exhibition. Anyone living anywhere near NYC [I am in Connecticut] should definitely go.
Many thanks to Qaos and Duncan for the superb puzzle and blog.
The SE corner held me up for a while with the difficulty of checking 29a, but knowing that the resolving letter had to be a U got me there eventually.
We really shouldn’t call Pluto a planet now, but it is a hard habit to break. It was in 1978 that things started to go wrong when its large moon (Charon) was discovered, meaning that Pluto itself was much smaller than previously thought.
Cheers for the info, Gordon. You do have to be careful filling in the online form. It would be nice to get an email back showing the contents of ones’s entry, just in case. I only started attempting the Genius a few months ago, so have never known a time when it used an interactive grid. Yes, a shame Hugh missed the CO reversal. I think it’s often late changes that allow things like this to slip through.
This was terrific stuff. A slog at times, but when I wrote out the letters, I said to my son “there’s two ‘M’s, and he got the reason why. Then looking at the relative positions – this is a mighty achievement. Thanks to Duncan and Qaos.
I enjoyed this. Worked out how the letter substitution worked pretty early and was fairly sure we were looking at planets about halfway through but still found the rest pretty tough with CAUMSTONE last in.
The grid construction is very impressive.
Thanks to Qaos and Duncan
Now, that’s clever. The position of the planets AND a satisfying formula for the clashes – there’s a lot to resolve there. Big Qudos.