CHENNAI CROSSIE OPEN, IIT Madras, 18 Apr 2015

All the best to all participants. May the best person win.

No 11371, Friday 17 Apr 2015, Gridman

Gridman's reminiscing about his Geometry class in school.

ACROSS
1   Two musical instruments combined into a third one (8) HORNPIPE {HORN}{PIPE} Semi&lit

5   X working exactly (4,2) SPOT ON {SPOT} {ON}
9   One who puts on a cap (7) LIMITER [CD]
10 OT, a round figure (7) CIRCLET {CIRCLE}{T}
11 A sort of equipment for sight-seer (9) BINOCULAR [CD]
12 A number caught in this Latin confusion (5) HAVOC {H{A}{V}OC}
13 Serious! Without a flap, home is made! (4) NEST earNEST
14 Disgusting! Salesman at far end of Thimpu lives badly (9) REPULSIVE {REP}{t...pU}{LIVES*}
17 Gentlemen get somewhat dear in exchanges (5-4) TRADE-OFFS {T{DEAR*}-OFFS}
19 Throw a fit! Fellow overlooked a mistake (4) GOOF {GO OFf}
23 Proportion provided by real tailor, oddly (5) RATIO ReAl TaIlOr
24 Spends time in the country, catching unwary liar in tricks (9) RURALISES {RU{LIAR*}SES}
25 Get hold of first-class piece of mortar and prepare for firing (4,3) TAKE AIM {TAKE} {A1}{Mo...r}
26 Bliss in perfecting nivaran (7) NIRVANA*
27 Box detective come back to hold query (6) CASKET {C{ASK}ET<=}
28 Maybe, get round to having an amount of computer space (8) MEGABYTE*

DOWN
1   Rashly determined — on way to damnation (8) HELLBENT {HELL}{BENT}
2   Fills a memory gap concerning watches (7) REMINDS {RE}{MINDS}
3   Places church in a revolting situation (6) PUTSCH {PUTS}{CH}
4   Piece of writing three learners, taking a quarter, presented to old Indian village figure (13) PARALLELOGRAM {PARA}{LL{E}L}{O}{GRAM}
6   Thing bought is tea in a bag (8) PURCHASE {PUR{CHA}SE}
7   Capital tale spun out by victors surrounding one (3,4) TEL AVIV {TEL A}*{V{1}V}
8   See, it's thawed (6) NOTICE {NOT}{ICE}
10 One might calculate it roundly (13) CIRCUMFERENCE [CD]
15 Recommend a barrister (8) ADVOCATE [DD]
16 Where behind-the-scene action takes place (8) OFFSTAGE [CD]
18 New shoots? (7) RETAKES [CD]
20 Somewhat rosy about Australia returning burial urn (7) OSSUARY {OS{SUA<=}RY*}

21 Judge top commander holding incomplete ritual (6) CRITIC {C{RITe}IC}
22 Song of praise — one in largo rendered (6) GLORIA {GLOR{1}A*}

GRID