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(Digram t)BLACKSTRCNZWILK80 0 * 8X N* HMROHDEWHITEWHITE(Diagram 3)BLACKMORTOR CfN QB Q K KB KN KRTHORN ALLYWHITEthornallyWHITEWatch the pm developPm becomes bindShelbyLyman4Pinsthatare toughto breakseenandsave the knight. But Rohde played 6. BxR check, KxB; 7. Q-Q2 check, K-N2; 8.are as basic to chess itself as con- Q-N5 check, K-Bl; 9. RxN, Q-Kl; 10.troversy is to Bobby Fischer.For example, pins and pinning combinations are the natural expression of the long-range pieces (the queen, rooks and bishops) along the various “straights” (verticals, horizontals and diagonals).R-R6 and black resigned. Not only is he behind in material but the threat 11. R-R8 mate is too much.A MORE SUBTLE pin and one without sacrifice develops from Diagram 3 (Thornally vs. U.S. Open ChampionWherever there are pieces placed in a Hort). Thornally (white) decides in this line, both players should be on the alert, position to retreat his attack bishop to KlA tactical outburst may be germinating. (probably better was P-QN4).But pins probably are the most frequently occurring straight-line tactical motif. And pins often are deadly in their effects. A pinned piece is a natural target. The concentration of forces on it can(.After 1. K-Bl, R-R8 (the pin); 2. K-Nl . . B-N5 was threatened) P-K6!;K-Bl (not 3. RxP because of; 3. B-B4),destroy the defender’s position.THE PROBLEM is that pins often are very difficult to break. An effective pin can paralyze a position, until either the position or the pin is terminated.In the last U.S. Open Championship, 14-year-old Michael Rohde showed histacticalwhen he sacrificed asavvyknight for a powerful pin in the following position. (Diagram I)Here, after Strenzwilk’s 1P-Q5; 4. P-N3, B-N5, white is in a terrible bind. (Diagram 4)Thornally labored futileiy for several more moves but finally succumbed after 5. B-N2, N-N5; 6. B-B3, RxB check; 7. RxR, NxP check; and resigns.In both the above games, the pins were so strong that they had to result in winning conclusions after correct play.Copyright 1974 by Shelby LymanAddress your questions in care of thisP-KN4, column to Paddock Publications, P.O.Square dance newsRohde played 2. NxP! After . . . PxN; 3. Box 280, Arlington Heights, III. 60006.BxP, the murderous pin is in effect.There is no effective way for black to break the pin or counter white’s coining onslaught on the black knight.Diagram 2 shows the inevitable result.Rohde has brought his rook to KB3, where it attacks the victimized knight, and Strenzwilk has defended with his own rook. (The actual moves were 3 K-N2; 4. R-K3, R-Rl; 5 R-B3, R-R3.)Black obviously has been forced to offer a rook for a bishop in an attempt toBAND RAMBLERSJim Stewart will be railing the squares for the Rand Ramblers Saturday night at the B«»y Scout of America Building, 1622 N. Rand Rd , Arlington Heights, and Art and Ruth Youwers will handle the rounds.All area square and round dancers are Invited. Darning begins at 8 p.m. and continues until 11 p.m. . . . Refreshments are served. For more information call 963-1945 or 259-4415.
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Des Plaines Herald
Des Plaines, Illinois, US
Fri, Dec 27, 1974
Page 8
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