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SISIlR SQUARES 311<br />
SICIIRJONSSON, GUDMUNDUR (194?- ),<br />
leading Icelandic playcr, International Giaddnas<br />
ler(1975). ilcr Ndyinglaw urlil1973 he becam.<br />
a.hcs prolesional. Hn best wi.s scrc nr calegory<br />
8<strong>to</strong>umamenls.rSanFeliudc Cuixols 1974(shared<br />
Bnh oR{rcA) and Orense 1976 Gbaied with<br />
RoGoF.and G l. CarciaJ: andhis beslresuitwas at<br />
akntucgos n t97b$hcnheqa\tlnnd(+7=6 1)<br />
equ.rL uith hzuv(E\ after uurKo Sigurl6n$on<br />
played Ior his cou.try in seleral OlynPi.ds tiom<br />
1966.<br />
SILBERSCIIMIDT VARIATION! 593 in the<br />
KrNc's o^MBrr Acceptcd. Hnsch Silbe$chmidl,<br />
examininesAr!ro\analysis(whichbeginsTd413)<br />
ibund improvements thlt Nould eile Black a<br />
dccisirc advanlager rhese ecre pubtisbed in Dd<br />
canbit olo Ansl4f und v kmieuns sesei<br />
Ganbit.Lge, 1829. silbe*chnidr dcdicaled this<br />
andoihcrbooks <strong>to</strong> theDuke ofBrunslick. in spite<br />
of which he rvas held !s a polilical Pnsoner in<br />
Brunswick jail iron 1830 10 1844.<br />
SIMAGTN. VLADIMiR P,\VLOVICII (1919<br />
68), Soviet player. Internalional Grandnaslcr<br />
(1qi2) lnrernarional c,respondence chcss Mas-<br />
1cr (1966). In lhe Moscoe Cn<strong>amp</strong>ionship he *as<br />
second (+8=6 1) ailer RRoN$rN in 1916, joidt<br />
Ninner wnh Bronstenr in 19rlr. second ro pErRosyAN<br />
aitcr a play-off in 1956, and outIight<br />
ch<strong>amp</strong>ion in 1959. Sinagin was les successful in<br />
the seven USSR chanpionships be entered lron<br />
19511o 1965. His bcst intematiorll iesulrs wete in<br />
rNo rournamenrs ol about caregory 10: saraje,o<br />
1963. second equal with cu.o{4, !rov, and<br />
IHIMANN hall ! poinl aiter PoRnscE: and Sochi<br />
1967-lirs1(+6=8 1) equal qih nocnE. $IA Ko.<br />
vrcni spass(y. andA. N. zAlrsrv. Simagindiedofa<br />
hean attack while phyine in a rournament at<br />
Kislovodsk. He discovcred several irteresling lines<br />
oI plat in the opcning pbase, sode olNhicrhavc<br />
b€cn namcd alrer him<br />
S. B. Voronkov, Vlddhn Snnaein ltgtlt) i\ ^<br />
biograph, in Russian. wirh 95 gamcs.<br />
SIMAGTN VARTATION. ]92 in tITe GRLNFELD<br />
DErFNc.l257. rhc a.cLLEulED D*coN Vanadon<br />
.f ih. q(rrr^N nFFFN.F' 40R in the sPANrsn<br />
orENrNG,lron the gane Simaei.-E{rin, Moscow<br />
SIMI(HOVTCII, FROIM MARKOVICH (I89G<br />
1945), Sovier conposcr. cbemical enEineer<br />
Althougn hc composed a leN Problems he is<br />
renrembered lor his condbution <strong>to</strong> the art ol<br />
sludies. sinkhovjch sas onc oi the firn conpose^<br />
who consciouslysc<strong>to</strong>utlo examine the Possibililies<br />
of thc rcsrroN^r Dhv. and he investigatcd the<br />
FoRress. which he so namcd.<br />
sIMoNsoN, ALBER'I c. (191.l65). Anerican<br />
player in his prime during the 1930s His best<br />
achievcm.ntwas inrhe frrsr lournamcnl for the US<br />
Ch<strong>amp</strong>ionship. New York 1936. whed he came<br />
second (+9=4 2) .ILer REsEE,so ahcad ol nNF<br />
SIMPLIFICATION, tbe exchange ota numberol<br />
pieces or. on iare occasion. paw.s. EUwE.who calh<br />
this liquidalion. sDggcsls lour Dain calegories:<br />
(l) A playersishes ro lorce a dras. Trying <strong>to</strong>o<br />
hard <strong>to</strong> lorce erchanges- hoacver, oltcn l€ads ro<br />
(2) whcn on the defensive, a player nay seek<br />
ex.hanges <strong>to</strong> lessen tbe lorce ol thc ara.k. Thn<br />
rime bonoured advice, eivcn in almost every<br />
rextbook. h Dot alwats easy <strong>to</strong> lollow.<br />
(3) A player wnh .n .dvantaee naycx.hanse<strong>to</strong><br />
obtain a clear cotposilion that oilen bis opponent<br />
hlle ch.nce of counierplay. (For exanples see<br />
.{PAur.AN.A and vEckrNc.)<br />
(a) Masters Nho hare a spe.ial taleni for<br />
handling sinplilied positio.s may seek them<br />
SIMULTANEOUS DISPLAY! a number of games<br />
played simullaneousl! b], one Player who salks<br />
lrom boardlo hoardmakinghis moves. <strong>The</strong>re arc<br />
no ol{icialrulcs bul heshould not bteach ih.la{s<br />
ol thc game, such as the rou<br />
When he adves ar a board his opponent is<br />
expeded <strong>to</strong>nore a<strong>to</strong>n.ci neithersoonernorlaler.<br />
rAsni-r sas thc nsr plater <strong>to</strong> meel as n'any as<br />
ll)0opponents when. at Munich in 1911. he scored<br />
+55:39 6 ln selen and a hall hours. <strong>The</strong> mosl<br />
ournanding score foralarge dnplll sasachievcd<br />
bt cApABLAN.a at Cleleland, Onio. in 1922:<br />
+ 102=1 0 in selen hous. At Seo Paulo in 1950<br />
NNDoRF plryed 250, scoring +226=14 10 in<br />
elelen hou6, Such records bave no great sienilicance<br />
bccause inlornation aboul tnc slreneth of<br />
the opposnlon is dol availahlc. AlBuenos Aires in<br />
1940 sriELBERc Eave a conlinnous display as<br />
ganes ended ncwo.csbegani playingon40boards<br />
he madc a score ol +362=1,1 2.1in 36 houn 5<br />
minutes. In 1929 rARrA(owrR claimed another<br />
kind oi record: fiavelling lrom a <strong>to</strong>urnaneni at<br />
Budapest 10 onc at Barcelona he became thc 6sr<br />
playcr<strong>to</strong> eile a sinuhaneous display on an ancralt<br />
flight<br />
Sometines clocks are uscd wilh a tine linit oi<br />
abour20moves a. hour. Eacb opponenl may movc<br />
at any rime and press hn clock, so that whil€ the<br />
ptaye. gi,ing a display is noving at one board his<br />
clock may be tickinp at all rhe orhes. Tioe<br />
Presure becomcs severei and a naster wouid<br />
rarely fla_\,mo.e than ten opponenls.<br />
SINOLE-MOVE. a move <strong>by</strong> While or a molc b-\,<br />
Ela.k. Thisiern nakesa uselul distinction,forlhe<br />
word imove n irequenlly used io mean a nove bl<br />
White and a frovc <strong>by</strong> Btack<br />
SISTER SQLTAXnS, an alternative terd ior coNru<br />
c rE sauAREs coincd <strong>by</strong> the English composer<br />
Henry D'O],ly Bernard (1878 1954),
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