Crossword solution

The unclued lights and the four lacking their definitions (7, 20, 35 and 36) are MUSICAL INSTRUMENTS. First prize Wendy Meredith, Exeter, Devon Runners-up C.S.G Elengorn, Enfield, Middlesex; Rhidian Llewellyn, London SW14

The  unclued Across lights are fictional captains and (Down) their ships. 10/24 (20,000 Leagues under the Seas), 11/30 (C.S. Forester series), 13/33 (Moby-Dick), 21/20 (BBC children’s TV) and 22/17 (Treasure Island). First prize Linda Manson, Stoke Holy Cross, Norfolk Runners-up K.G. Osgood, London Colney, Herts; Caroline Sutton, Rhiwbina, Cardiff

The puzzle appeared on 23 September 2023. The unclued lights reveal TWENTY TWENTY-THREE’S AUTUMN EQUINOX OCCURS TODAY AT SIX-FIFTY AM, GMT. First prize Sally Reeve, Bath Runners-up John Pugh, Ely, Cardiff; J. Gill, Warlingham, Surrey

The unclued lights are PUB NAMES which include the pair 38/31 First prize  Mary Newbery, Devizes, WiltshireRunners-up  David Burnside, Rosewell, Midlothian; John Brown, Rolleston-on-Dove, Staffordshire

Flaubert said ‘You can calculate the worth of a man by the number of his enemies,’ while Voltaire, asked to renounce the devil on his deathbed, said ‘This is not the time for making new enemies.’ First prize  P. and J. Chamberlain, Rushden, Northants Runners-up  Tony Hankey, London W4; Willie Hamilton, Exeter

8A/31D, 23A/19D and 36D/7D are eponymous 29D/12A characters. 7D originally suggested D’Urberville, which needed to be changed to DURBEYFIELD, making new real words at 21A, 24A, 30A and 35A. First prize Magdalena Downton, Maidstone, Kent Runners-up Nicola Fletcher, Horsmonden, Kent; David Andrews, Ash Vale, Surrey

The unclued lights (13, 12, 16, 40, 42, 18, 15, 16, 26) reveal Eric Morecambe’s comment about his rendition of Grieg’s Piano Concerto to Andre Previn in their 1971 Christmas special. First prize Stuart Paston, Norwich Runners-up Donald Bain, Edinburgh; John Kitchen, Breachwood Green, Herts

Adjacent pairs in the ordered chain of unclued entries [38] CHAIR, [14] MAN, [25] POWER, [15] STATION, [10] MASTER, [40] KEY, [8] RING, [29] FINGER, [36] POST, [44] CARD and [17] BOARD form single words in their own right. First prize Andy Wallace, Ash Green, Coventry Runners-up Jonathan Jones, Oxford; Elizabeth Duff, London NW5

The twelve unclued lights are names of COMPOSERS whose names begin with or end N to Z. (Martinu ends in U and Quantz covers the Q and Z.) First prize John Nutkins, Brentford Runners-up Diana King, Leeds; Leigh Hughes, Bootle, Merseyside

The thirteen unclued lights are the name of COMPOSERS whose initial letters are A to M. First prize Stephen Rice, London SW1 Runners-up C.R. Haigh, Hassocks, West Sussex; Lynne Gilchrist, Willoughby, NSW, Australia

Unclued lights are some laureates of the Nobel Prize in Physics. There were two CURIEs (35). The clued name was Max BORN (8). The title is an anagram of NOBEL PRIZE. First prize Sid Field, Stockton on Tees Runners-up David Carpenter, Sutton Coldfield G. Asher, Bucknell, Monmouthshire

The key word is GIBBON (highlighted). 1A, 1D and 28D are types of gibbon; 16D is by 18A 29A Gibbon; 32D Gibbon wrote The History of the 13A 38A of the Roman Empire. First prize Anne Clements, Bromley, Kent Runners-up Janet Baines, Winchester, Hants; L. Malone, Dumfries

The unclued lights are STREETS or a phrase including STREET (34A). ST had to be highlighted four times in the grid. First prize Tom Rollinson, Borehamwood, Herts Runners-up Anna Jones, Manton, Wilts; James Bench-Capon, Cambridge

The eight unclued lights are the names of flightless birds, past and present. First prize John Honey, Brockworth, Gloucester Runners-up Fran Morrison, Putney, London SW15; David Dickson, Tarrant Monkton, Dorset

Unclued lights were world CHESS champions. Current champion DING was to be highlighted. First prize Gail Petrie, Brean, Somerset Runners-up Hugh Aplin, London SW19; Philip Grindrod, London W4

Each of the unclued lights (with the pair at 15/26) includes D C C (= 700). First prize Rosamund Campbell, Woodstock, Oxon Runners-up J. Smithies, Vale, Guernsey; William Devison, Shaldon, Devon

The literary scholar F.S. Boas used the term Problem Plays (9D) to refer to a group of Shakespearean plays which seem to contain both comic and tragic elements: Measure for Measure (12/36), All’s Well That Ends Well (39/1) and Troilus and Cressida (21/22). First prize J. Bielawski, Southport Runners-up Alastair Aberdare, London SW13; Jeffrey Frankland,

Reading the title as ‘backup’, unclued answers VOLTE-FACE, RETREAT, SPIN, TURN, COUNTER, BACKTRACK, WITHDRAWAL, ROTATE, RETIREMENT and RECOIL had to be entered in reverse. First prize Wyn Lewis, CarmarthenRunners-up Rhiannon Hales, Ilfracombe, Devon; J.E. Green, St Albans, Herts

The unclued lights are some of the brightest Northern Hemisphere stars. First prize Peter Taylor-Mansfield, Worcester Runners-up Jo Anson, Birmingham; Caroline Arms, Ithaca, NY, USA