Shelby Lyman on ChessTHEPetrosian known for his quiet and subtlemaneuverspknownspringcastled and reachedalsosition in Diagram 2.are other tries) and Tigran played 18) wmmmmmiwmmmmmmmmmmmmmmm*nownedchampionPetrosian, re-(Diagram 2)B-5, forcing the replyQ-Kl andA brief analysis reveals white’s sub-a • m -creatingmaneuvers, is a master of tactics andattack when the occasion demands. Tigran, the humanstantiai superiority. The elimination of black s white-squared bishop and thegeneral lineup of the pieces has left white with one-sided control of crucial(Diagram 3)What is Petrosian’s next move? An-PetrosianKochievplyhe played 19) B-B6! After(white)(black)as if he were half tiger or a “tigranas Ringside squares. Notice how the twoit were. - - - -signedP-N3 and 20) Q-B4, Kochiev re-1.P-K4P-K4(Diagram 1)and(Diagram 4)2.N-KB3In the position in Diagram 1, blacksupported by the rook(Kochiev) is already in serious trouble. Aftercombine to rake the kingsideIn the position of diagram four aftei 19) B-B6!!, the threat was 20) Q-R53.B-N5N-QB34.B-R4P-QR3N-B3■HP-N3; 21) Q-R6 followed by checkmate5.0-0NxKPn hpVafeS,IWhlt€ Wl11 immediately Play Kochiev resigned. Can you guess the firstAfter6.P-Q4QxRP checkmate. For this reason, heinstead• •BxN and Petrosian (keeping his kingside pawns intact)playedand(Diagrom 1HLM.KKurliii \QR QN QBKB KN KRIVlrO'i.tuHITKBlocb *s in troubit(Diagram 3*Sb Nbblack.QR QN QBKN KRlVlro-i;mN\ If If I.Whot i$ white's decisive move?Petrosianunavoidable7.B-N3P-QN4controllingboth8.PxPP-Q4B-K3position9.P-B3N-B4KB6 and K7 squares and gaining Petrosian’s determinedtime by attacking the black rook at Ql.opponentmaneuvering game has culminated in an abrupt and10.B-B2B-KN511.R-Klfor squares in the earlier phase of the12.QN-Q2Q-Q2devastating finale.13.N-N3R-QlB-K2(Diagram 2»BLACKLYMANISM14.NxNKBxN“If the pen is mightier than the sword15.Q-Q3BxN8is it also not ‘true’ that preventing Cen-16.QxB0-0taurs from playing chess ought to be17.B-N5B-K2known18.B-B5Copyright 1973 by Shelby Lyman19.B-B6Q-KlP-N3Address your chess questions to Shelby20.Q-B4ResignsLyman, P.O. Box 280, Arlington Heights111. 60006.• * * * »'■••■•■••••■(••.a,,,,,, B . aa.aa.a.1 • ‘ ...CATALOG SUR]QR QN QB Q K KB KN KRJV'IrowJiifiWHITLvhit* controls the king side. Mo* ooehe further fhjs control?RtfDtfb NbtDiagram 4iBLACKKorJiif\HurrIN* • w •KN KRA\HITEBlack is lost. He» resigns two move latep.PernWAlvrnw