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Akiba Rubinstein vs Erich Cohn
Karlsbad (1911), Karlsbad (Karlovy Vary) AUH, rd 5, Aug-26
Queen Pawn Game: Zukertort Variation (D02)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Feb-02-06  EmperorAtahualpa: Time trouble?
Feb-02-06  euripides: <emperor> Idon't know whether Cohn resigned, but I think it's lost.

White wins the pawn race after 37...Rb2 e.g. 38 Rf1 Rxb4 39 h5 c5 40 Rf6 c4 41 h6+ Kg8 42 Bxe6+ Bxe6 43 Rxe6 Kf7 44 Rf6+ Ke8 45 e6 c3 46 d7+ Ke7 47 Rf7+ Kd8 48 Rf8+ followed by d8=Q+. There are many other possibilities but it looks bleak for Black.

If the rooks come off White can win the ending by putting his king on b6, thus tying up the black king, and playing h5 and g6 when Black's bishop cannot defend g6 and e6. There is no way for Black to get the bishop to f7 without losing the e pawn.

Feb-02-06  EmperorAtahualpa: <euripides> Yes I think your analysis is accurate. I should have waited a little bit longer before posting.

Also if 37...Rf8 then 38.Rf1 Rxf1 (no other option otherwise White's rook can invade the Black camp via Bh5 and Rf7+) 39.Kxf1 and now White is basically in zugzwang, particularly once the bishop gets to h5, it isolates Blacks king completely also because of White's very good pawn structure.

Nice!

Jun-13-08  Timothy Glenn Forney: Nice analysis! This endgame is found in Silman's book.
Dec-17-12  nescio: High-class strategy! The bishop moves with little steps (d2-c3-d4-c5-d6) to the intended position and is established there, enhancing white´s space advantage. From that the ensuing attack on the king´s wing is almost inevitable.
Mar-02-14  Karpova: Dr. Emanuel Lasker, Berlin, August 31, 1911, on the final position:

<Weiß wird Td1-f1 ziehen und durch Lg4-h5 in das schwarze Lager vernichtend einbrechen oder den Turmtausch erzwingen. Danach marschiert der weiße König über f4 nach e5, zwingt den schwarzen König nach f7, indem er e6 zweimal angreift, und entscheidet etwa durch h4-h5 nebst g5-g6+. Schwarz tut recht daran, den nutzlosen Kampf nicht weiter fortzusetzen.>

(White will move ♖f1 and then via ♗h5 invade the Black camp with devastating effect, or force the ♖ exchange. After this, the White ♔ will go via f4 to e5 and force the Black ♔ to f7, by attacking e6 twice und decides the game e. g. by ♙h5 follwed by ♙g6+. Black is correct in not further pursuing the useless struggle.)

Source: 'Pester Lloyd', 1911.09.03, page 7

May-05-18  steinitzgambit: The situation is not so clear if Black plays 37...Rf8! instead of 37...Rb2? Then Cohn could possibly have achieved a draw with: 38.h5 Rf7 39.Rf1 Rxf1+ 40.Kxf1 Kf7 41.Kg2 Kg7 42.Kg3 h6 43.Kf4 Kh7 44.g6+ Kg7 45.Kg3 Bc8 46.Kh4 Bd7 47.Be2 Kg8 48.Kg3 Kh8 49.Kf4 Kg7 50.Bg4 Bc8 51.Bd1 Bd7 52.Bc2 Bc8 53.Ba4 Kg8 54.Kg3 Bd7 55.Kg4 Kg7 56.Kf4 Bc8 57.Bc2 Kf8 58.Kg3 Kg8 59.Bb1 Bd7 60.Kf4 Kg7 1/2-1/2 (Crafty). A Stockfish analysis would support Lasker's comment: 38.Rf1 Rxf1+ 39.Kxf1 c5 40.bxc5 Bc8 41.Ke1 Kg6 42.Kd2 Kg7 43.Kc3 Kg8 44.Bh5 Kf8 45.Kd2 Bd7 46.Ke2 Bc8 47.Kf2 Bd7 48.Ke1 Bc8 49.Ke2 d4 50.exd4 Bd7 51.Bg4 Kf7 52.Kd2 Bc6 53.Kc3 Bd5 54. h5 Bc6 55.g6+ Kg7 56.gxh7 e3 57.d5 e2 58.Kd2 exd5 59.d7 Bxd7 60.Bxd7 Kxh7 61.e6 Kh6 62.e7 e1=Q+ 63.Kxe1 Kxh5 64.e8=Q+ Kh6 1-0
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