100 



KNOWLEDGE. 



[May 1, 1891. 



Kt3. 20. . . . Kt to Kt8 at once would be useless on 

 account of 21. P to Kt3, and if Black sacrifices the Knight 

 the White King escapes to QB2. Mr. Tschigorin's ob- 

 ject, no doubt, was to prevent P to KB'l, even though that 

 move would give liim a passed Pawn. 



(/) A very fine move, if properly followed up. Black 

 is practically bound to take the offered Pawn, or White 

 could Castle (against his principles) on the Q side. 



(//() " Steinitz's Delight." Moreover it threatens to win 

 a piece by P to QR3. At the same time, with all due 

 deference, it is difficult to describe it (followed up as it is) 

 otherwise than as an extraordinary blunder, occurring as 

 it does in a correspondence game. White might have 

 obtained the superioritv by the following simple line of 

 play : 21 . P to QR3. B xKt (forced ) ; 22. B x B, Q to Kt3 ! 

 (If Q to Qsq, White wins a piece by Q x P and Q to K.5) ; 

 23. QxP, PtoB3!; 24. P to QKt4, Kt to KtG ; 2.5. 

 E to Qsq, followed by Kt to R3. 



(n) If 23. KtxP, B to R6 ch ; 24. K to Ksq, 'snth a 

 good enough game. Black is still a Pawn to the bad, 

 and his attack is, to say the least, not obvious. 



(o) The best, and in fact the (mly move, as White 

 threatens P to QE3 followed by Kt to K4. 



(/<) Another extraordinary blunder. Q to Bsq was the 

 only move. B to K4 would obviously lose a piece. The 

 same result would attend Q to Qsq, on account of the 

 reply B to Q6 ch. 



After 24. Q to Bsq, B to Q6 ch (better than B to R6 ch, 

 to which White could reply 25. K to K2) ; 25. QKt to K2 !, 

 Q to R5 ; 26. Q to K3, with a good game. 



It should be noticed that 25. K to Kt2 was out of the 

 question on account of the winning reply RxB! 25. 

 K to Ksq was also dangerous in view of QR to Ksq. (Not, 

 however, 25. . . . R xB ; 26. Kt x R, Q to K5 ch ; 27. 

 Q to K3, Kt to B4 ; 28. Q x Q, B x Q ; 29. K to K2 and 

 wins). 



(q) He perceives now, what he must have overlooked at 

 move 21, that 25. BxB would lose on account of 25. 

 . . . E X P ch ! ; 26. Q X R, Q x B ; 27. Kt to B3, R to 

 KBsq ; 28. K to Kt2, B to B4 ! ; 29. Q to Kt3, Q to B7 ch, 

 &c. ; or, better still, 29. . . Kt. to B4. Mr. Tschigorin, of 

 course, takes advantage of the move actually made, to give 

 up his Queen for more than an equivalent both in material 

 and position. 



(r) A learned commentator in an unlearned contem- 

 porary suggests here 26. ... K to Esq, as leaving the 

 King less subject to checks. He would be subject, how- 

 ever, to a mate in two moves, which White might 

 announce after 27. B x Q, B x E. 



After the next move on each side the game enters on a 

 new phase, the consideration of which, in view of the 

 alphabet running short, is postponed till the conclusion of 

 the game. 



The following additional moves have been made in this 

 game : — 



White. 



28. Q to E3 ! 



29. B to Ko 



80. B to B4 



81. Q to Q3 ch 



32. QxKt 



33. P to B3 



34. QxRP 



35. Q to QB7 



36. P to QE3. 



37. KtxE 



JBlack. 



28. Kt to B4 



29. QE to Ksq 



30. Kt to Q5 



31. B to K5 



32. RxB 



33. QE to KBsq 

 84. P to B4 



35. Kt to B3 



86. E X P ch ! 



87. R X Kt ch 



The Evans Gambit game has been continued as follows 

 since the publication of the diagram in the March 

 number : — 



21. 



White (Tschigorin). 



22. -Kt 

 23.^t 



23. "Kt to B5 



24. KtxB 



25. BxKt 



26. BxP 



27. QxR 



28. Q to R4 



29. R to Q2 



30. R to Ktsq 



31. R to Kt5 



32. Q to Kt4 



33. P to QR4 



34. R to Kt6 



35. Q to R5 



36. PxP 



Black (Steinitz). 



21. B to Q3 



22. KtxKt 



23. P to KKt3 



24. QxKt 



25. BPxB 



26. R to QRsq 



27. QxB 



28. K to Qsq 



29. K to B2 

 80. R to Qsq 



31. Q to B3 



32. P to Q3 

 83. Q to Ksq 



34. Q to Bsq 



35. P to Q4 



(Present 

 Bl 



The news of the death of Captain G. H. Mackenzie has 

 been received in England with the greatest regret. Be- 

 sides being for a great many years the strongest player in 

 America, Captain Mackenzie was perhaps the most uni- 

 versally popular of all the chess masters. As a player he 

 takes rank only after Mr. Steinitz and the late Dr. 

 Zukertort. 



Contents of No. 



PAGE 



A Seed, and What it Contains. 



By J. Pentiand Smith, M.A., 



B.Sc, &c 61 



Nnmmulites and Mountains. 



By E. Lydekker 64 



Dissemination of Seeds. By 



Theodore W. Dicker 65 



Calcite and Aragonite in Shells. 



By Vaughan Cornish, B.Sc., 



F.C.S C7 



Excavations at Luxor. By 



Canon Isaac Taylor 69 



PAGE 



Letters:— A. S. Hansard, T. S. 



Barrett, F.J. Provis 70 



Stellar Spectra. By E. W. 



Maunder, F.R.A.S 71 



A Perpetual Calendar 74 



Our Invisible Foes, or Bacteria 



in .Agriculture. By Miss A. 



W. Buekland 



The Face of the Sky. for April. 



By Herbert Sadler, F.R.A.S. . . 78 

 Whist Column. By Montagu 



Gattie, B.A.Oxon 79 



TEEMS OF SUBSCRIPTION. 



" Knowledge " as a Monthly Magazine cannot be registered as a Newspaper 

 for transmission abroad. The Terms of Subscription per annmn are there- 

 fore altered as follows to the Countries named; s. d. 



To West Indies and South America 9 



To the East Indies, China, &c 10 6 



To South Africa 12 



To Australia, New Zealand, &c 14 



To any address in the United Kingdom, the Continent, Canada, United States 

 and Egypt, the Subscription is 7s. 6d., as heretofore. 



Commmiications for the Editor and Books for Eeview should be addressed 

 Editor of "Knowledge," care of David Stott, Bookseller, 67 Chancery 

 Lane, W.C. 



