242 



KNOWLEDGE 



[OCTOBEK 1, 1890. 



White. 

 Mason. 



39. B to BS (o) 



40. BtoB5 



41. PtoRo 



42. KttoQS 

 4:!. RxB 



Black. 

 Gunsberc. 

 RtoKt2 

 RtoB3 

 R to Kt7 

 B X Kt (p) 

 RtoRT 



44. B to KtG (7) K to Ktsq (1) 



45. RtoKKta KtoB2 



White. 

 Mason. 



56. BtoB5 



57. KtoKt3 



58. B to KtG 

 .59. KtoB2 

 GO. KtoKtS 

 Gl. Kto B2 

 G2. KtoKt2 

 G3. KtoB2 

 04. K to Ksq 

 G5. KtoQsq 



66. KtoBsq 



67. K to Ktsq 



68. KtoKt2 



Black. 

 Gunsberg. 

 RtoKt7 (eh) 

 RtoR7 

 RtoRS 

 RtoR7(ch) 

 RtoRS 

 R to R6 

 K to B5 (.rl 

 R to R7 (ch; 

 KxP 

 KtoBG 

 P to Kt5 

 RtoR5 

 P to KtG 



69. K to Kt3 (y) R X P 



46. Kto Ktsq PtoR4 



47. KtoR2 RtoKt3(s) 



48. BtoQ8 RxR 



49. KxR KtoKS 



50. KtoB3 KtoQ4 



51. BtoKte PtoKt4! (/) 



52. P to Kt4 («) R to RG (ch) (v) 



53. KtoKt2 PxP 70. BxR " PtoKt7 



54. PxP KtoKo 71. PtoQ5 PtoB4(j) 



55. K to B2 R to QKt6 (w) Resigns. 



Notes. 



(u) Or P to KKt3 foUowed by B to Kt2, &c. 



(b) A waiting move, to avoid castling as long as White can advance 

 his KRP and KKtP. 



((') KKt to B5 would have prevented the intended advance of 

 Black's KBP wherebv he obtained an open game. 



((/) 14. P to K5 would be answered by P to B5, but 14. P to B3 

 should result in a satisfactory game for White. 



(e) Loses time, as White seeks to retire his Knight to B3, which 

 is. however, not a favourable square in view of the possibility of 

 Black establishing his Bishop on Q4. 



Position at Black's 20th Move. 

 Black.— Gunsberg. 



* ' i ■*■ £. it. 

 ,,, i ,1, , ■ If 



( /") Black has now an excellent game, and is ready to pursue the 

 attack with R to Ksq, Kt to K5, Q to Kt5, and other moves which 

 should tend to his advantage. 



(y) White probably felt that he must make some effort to forestall 

 the impending advance, and, moreover, if Black takes the RP his 

 own QRP will in course of time become untenable. White also per- 

 haps put an undue value on the move of Q to K7. However that 

 may be, the sacrifice of the Pawn and White's subsequent play was a 

 serious error of judgment. 



(A) This move gives Black a winning game. 



(i') There is no escape from here for the Rook. 



(j) It seemed the most natural thing to do, to win the exchange by 

 playing B to R3 and B to Bsq, but R xP ought to have given Black 

 a far easier game to play ; he would have been two Pawns to the 

 good and would still threaten to win the exchange, or simplify 

 matters by playing R to B2. 



(t) It was difficult to decide between this move and Pto Q4. The 

 latter move was probably better. 



(/) Black has a very restricted position and must endeavour to 

 bring his pieces into play by abandoning this Pawu, the only ques- 

 being as to the most advantageous way of doing so. 



(m) Black has at last managed, at the cost of a Pawn, to struggle 

 into a playable position. 



(n) If Black plays R to R7, White could continue with 39. B to B8, 

 threatening complicitions which it is as well to avoid. 



(o) This is now loss of time, as it will enable Black to play 

 R to B3, bringing also his second Rook into play. 



( p) Kt to Kt4 might become troublesome. By taking this Knight 

 Black, with a draw in band, has still some winning chances. 



((/) If R to R3, Black replies with R(B3)B7. 



(r) An attempt to gain time. An exchange of Rooks would be 

 favourable for Black, This he could now bring about by playing 



R to Kt3, compelling R to Kt3 by White ; but Black endeavours to 

 gain time, and playRtoKt3 when his K is on B2, because his ad- 

 vantage would be increased if he can bring his Kingirinto the middle 

 of the board earlier than White. 



(.«) Black has gained the time he was striving for. 



Position after Black's 51st Move. 

 Black.— Gunsberg. 



White.— Mason. 



(/) It is not by any means clear whether now there is any way for 

 Black to force a win. There are two ideas worth fighting for, which, 

 however, can only be vaguely given in outline, namely, to drive the 

 King back sufficiently far to enable Black to play K to Kt4 followed 

 by R X RP, or to advance the Kt's pawn to KtG. 



(m) a mistake, which costs the game. 



(f) Black could also have played PtoR5, followed by R to R7. 



(u?) Too much caution. Black is endeavouring to drive the King 

 back still farther, but K to B5 would have won. 



(j') Black has gained one more move on White through the 

 manceuvres of the last few moves ; on his 55th move, when Black 

 could have played K to B5, the White King stood on B2. 



(y) P to Qo was his only way of prolonging the game. 



(2) The last move sufficiently indicates the cautious manner in 

 which Black was playing this ending, in which he never lost his ad- 

 vantage ; and although it is possible that White missed some drawing 

 chances, still the play from the 37th move is an instructive example of 

 various phases of end-game play, illustrating the power of a Rook 

 when in the seventh lile, and the value of gaining time. 



J. Wall. — The ending as sent by you seems like an impossible 

 position, as White's Pawns could hardlv have got placed like that, as 

 if 1. P to Q4, PxP, Black could win • but if P to Q4. P to B5, B to 

 to R4, P to Kt4, White bas an advantage. 



Black Combe. — I shall act upon your suggestion. 



Contents of No. 59. 



PAGE 



Variable Double Stars. By. J. 



E. Gore. F.K..\.S.. M.B.I.A. . . 203 

 Horns and Antlers. By K. 



Lydekker, B.A.Cantab 205 



Old Hindu Algebra. By Frederic 



Pincott 207 



Why is the Sea Salt? By W. 



Mattieu Williams 207 



The Bed-Bag.— I. By E. A. 



Bntler 209 



On Some Kecent Advances in 



the Mapping of the Solar 



Spectrnm. By A. C. Ranyard 211 

 Letters:— R. Chartres ; S. E. 



Peal;W. W. E 213 



PAGE 



Notices of Books 214 



The Mariner's Compass : its 

 Errors and their Causes. By 

 R. Beynon 216 



Harmless Parasites and Unin- 

 vited Companions.— II. By 

 HenryJ.Slack,F.G.S.,F.E.M.S. 218 



The Face of the Sky for Sep- 

 tember. By Herbert Sadler, 

 F.R.A.S 219 



Whist Column. By W. Montagu 

 Gattie 220 



Chess Column. By I. Guns- 

 berg 221 



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