{"id":5988,"date":"2019-11-23T08:36:43","date_gmt":"2019-11-23T16:36:43","guid":{"rendered":"http:\/\/www.danamackenzie.com\/blog\/?p=5988"},"modified":"2019-11-23T08:47:02","modified_gmt":"2019-11-23T16:47:02","slug":"poor-confused-computer-needs-your-help","status":"publish","type":"post","link":"https:\/\/danamackenzie.com\/blog\/?p=5988","title":{"rendered":"Poor Confused Computer Needs Your Help"},"content":{"rendered":"\n

Last night, in the fourth round of the Kolty Club Championship, I was paired against an expert, Chris Atkeson. We played what I think was a really high-quality game\u2026 and as it usually happens in games where nobody makes an obvious mistake, we drew. It was a draw that both players were happy with (at least initially). I was happy because in the early middlegame I seemed to be in great danger of being blown out. Yet somehow my dubious-looking position got better and better, and near the end of the game I thought I was probably winning. But Atkeson fought hard to the end and managed to get a draw by perpetual check.<\/p>\n\n\n\n

When I went over the game on the computer, I was stunned to see how close we came to perfect play, according to Rybka. Over the last 16 moves, every move I played was in the top three choices of the computer. (Nevertheless, I think that my 30th<\/sup> move was a blunder that cost me a win.) Atkeson did even better. Fourteen of his last 16 moves were the #1 choice of the computer. Of the two \u201cmistakes,\u201d one was in my opinion not a mistake. And the other \u201cmistake\u201d was, from a practical standpoint, the game-saving move. He chose to play actively rather than defending a bad position, and that decision was eventually rewarded with a draw. So it\u2019s hard to say how he could have improved his play.<\/p>\n\n\n\n

And with that, I offer a puzzle for my readers. On move 21,\nRybka says the position is equal. Black then plays seven straight moves that\nRybka considers to be the best move. At the end of those seven moves, Black is\nnearly lost. What did he do wrong? And what is Rybka missing?<\/p>\n\n\n\n

\"\"
Position after 16. \u2026 Bd4. White to move<\/em>.<\/figcaption><\/figure>\n\n\n\n

FEN: 1r3rk1\/2p1qpp1\/p1p4p\/4p3\/3bP3\/2BP1R1P\/PPP1Q1P1\/R3K3 w Q – 0 17<\/p>\n\n\n\n

Let’s start a bit earlier, in the position where I first felt as if I was in trouble. I was White in a King\u2019s Gambit Declined. Black\u2019s move 16. \u2026 Bd4 didn\u2019t bother me until I realized that my intended defense, 17. Qd2?, allows the strong exchange sac 17. \u2026 Rxb2! 18. Bxb2 Bxb2 19. Rb1 Qa3. Black gets two pawns for the exchange and the passed a-pawn looks as if it will be very hard to stop.<\/p>\n\n\n\n

So I had to go to plan B, which was 17. Bxd4 ed 18. b3<\/strong> (groan). I think that b3 for White (and \u2026 b6 for Black) must be the one chess move that is most frequently played with a sour expression on one\u2019s face. It means that you can\u2019t find enough compensation to sacrifice the b-pawn, and all the defensive moves (here, O-O-O or Rb1) are too passive. So you have to play this move b3 that leaves your pawn structure full of holes.<\/p>\n\n\n\n

Here Atkeson decided not to play 18. \u2026 Qa3, which surprised me. After that my plan was to sac the a-pawn with 19. Qd2 Qb2 20. Rc1 Qxa2 21. Rf5, but unfortunately 21. \u2026 Rb5 is quite good and leaves Black a solid pawn up. Rybka says that White\u2019s best defense after 18. \u2026 Qa3 is 19. Rf1!, after which 19. \u2026 Qb2 20. Kf2! accomplishes nothing for Black. <\/p>\n\n\n\n

Maybe that\u2019s why Atkeson chose 18. \u2026 Rb5<\/strong> instead. I was glad to play 19. a4<\/strong> so that I wouldn\u2019t have to worry any more about \u2026 Qa3. Atkeson played 19. \u2026 Re5<\/strong>. White\u2019s position still looks tenuous. I can\u2019t ever castle queenside because of \u2026 Qa3+ followed by \u2026 Rb8 with a mating attack. I sure don\u2019t want to keep my king in the center, either. But first I decided to see if I could slow down Black\u2019s attack with 20. g4<\/strong>.<\/p>\n\n\n\n

Chris actually said that he missed this simple, logical move, and perhaps that shows in his next move, 20. \u2026 g6?! <\/strong>He is still trying to force the advance \u2026 f5, but the cost is too high because after an exchange of g-pawns he will be vulnerable on the g-file. He should have changed to a different plan, perhaps 20. \u2026 h5 immediately, with play similar to the game except that Black doesn\u2019t have the weak square on f6.<\/p>\n\n\n\n

I want to point out again that even after this move, Rybka rates\nthe position as only +0.1 for White \u2013 very close to dead equality.\nNevertheless, within 10 moves Black will be nearly lost, without making any obvious\nmistakes.<\/p>\n\n\n\n

Play continued 21. Kf1 h5 22. Qf2 c5 23. Kg2 Kg7 24. R1f1! <\/strong>(diagram)<\/p>\n\n\n\n

\"\"
Position after 24. R1f1. Black to move.<\/em><\/figcaption><\/figure>\n\n\n\n

FEN: 5r2\/2p1qpk1\/p5p1\/2p1r2p\/P2pP1P1\/1P1P1R1P\/2P2QK1\/5R2 b – – 0 24<\/p>\n\n\n\n

At this point I started feeling bullish about my position again. This is exactly what you play the King\u2019s Gambit for: to get a half-open f-file with tripled major pieces on it! But, of course, king safety is an issue, and Chris immediately targets my king.<\/p>\n\n\n\n

24. \u2026 Rg5 25. Rf6! \u2026<\/strong><\/p>\n\n\n\n

I was getting really low on time now, but this move was a no-brainer. It\u2019s worth a pawn to cement my control over this square \u2013 and besides, there are a lot of weak pawns in Black\u2019s position too.<\/p>\n\n\n\n

25. \u2026 hg 26. h4 Rh5 27. Qg3 \u2026<\/strong><\/p>\n\n\n\n

I wasted a precious minute debating between Qg3 and Qf4, and\nfinally opted for the safer-looking move. Rybka says it doesn\u2019t really matter,\nand I just wasted my minute.<\/p>\n\n\n\n

27. \u2026 Qd7<\/strong><\/p>\n\n\n\n

Sensible, but now the a-pawn goes.<\/p>\n\n\n\n

28. Rxa6 c6<\/strong><\/p>\n\n\n\n

For a second I thought, \u201cOh no! I\u2019ve self-trapped my rook!\u201d But it\u2019s easy to protect it with Rb6 and a5.<\/p>\n\n\n\n

29. Rb6 \u2026<\/strong><\/p>\n\n\n\n

And now Chris makes the decision that saves the game, even\nthough Rybka says it\u2019s a blunder.<\/p>\n\n\n\n

29. \u2026 R8h8!?!<\/strong><\/p>\n\n\n\n

\"\"
Position after 29. \u2026 R8h8. White to move.<\/em><\/figcaption><\/figure>\n\n\n\n

FEN: 7r\/3q1pk1\/1Rp3p1\/2p4r\/P2pP1pP\/1P1P2Q1\/2P3K1\/5R2 w – – 0 30<\/p>\n\n\n\n

For context, you have to realize that Rybka thinks Black should play lame defensive moves like \u2026 Rc8 or \u2026 Ra8. But that\u2019s just playing to lose, or to suffer a long time. I would make the same move Chris did, in a heartbeat. Nevertheless, it must be conceded that Black is losing, so the question definitely has to be asked: What did he do wrong?<\/p>\n\n\n\n

30. Qf4? \u2026<\/strong><\/p>\n\n\n\n

Another paradox! Rybka considers this move to be equally as strong as 30. a5, but they are not equal. The move 30. a5! tips the balance in White\u2019s favor: while we have roughly a standoff on the kingside, the passed a-pawn is a new weapon on the board. If 30. \u2026 Rxh4 31. Qe5+ Kh7 32. a6! threatening Rb7. Or if 30. \u2026 Qe7 (to prevent Qe5+) 31. a6 Rxh4 32. Rxf7+! followed by 33. Rb7 is a gut shot into Black\u2019s position. I think it’s an exquisite fact that the piece that gives White a winning attack on the kingside is the most distant piece on the board, the a-pawn.<\/p>\n\n\n\n

In my defense, I was very low on time now (5 minutes for the rest of the game). The immense power of this previously irrelevant a-pawn was not obvious, and 30. Qf4 looked very strong too. But now Black can play the line in the previous note without having to worry about Rb7.<\/p>\n\n\n\n

30. \u2026 Qe7! 31. Rxc6 Rxh4 32. Qf6+ \u2026<\/strong><\/p>\n\n\n\n

Now I was under 5 minutes on the clock, and this move seemed to make much more sense than going for an unclear endgame of Q vs. 2R with 32. Rf6 Rh2+ 33. Qxh2 Rxh2+ 34. Kxh2. Rybka rates the resulting position at +1.8 (!) for White, but I am far from convinced that White is winning. After, say, 34. \u2026 Kh6! (an important wrinkle) 35. Kg2 Qc7 36. Rxf7 Qa5 (diagram), can White really win this? There are so many dark squares where Black\u2019s queen can penetrate, and also if the queen ever gets to h3 it’s an instant perpetual. Also, Black\u2019s king has a perfect little hidey-hole on g5 where he can\u2019t be harassed by the rooks.<\/p>\n\n\n\n

\"\"
Position after 36. \u2026 Qa5 (analysis). White to move.<\/em><\/figcaption><\/figure>\n\n\n\n

FEN: 8\/5R2\/6pk\/q1p5\/P2pP1p1\/1P1P4\/2P3K1\/5R2 w – – 0 37<\/p>\n\n\n\n

Even though Rybka still says White is +1.6, I don\u2019t believe it. And I don\u2019t want to play an endgame like this in a time scramble where I have 5 minutes and my opponent has 30.<\/p>\n\n\n\n

32. \u2026 Qxf6 33. R6xf6 Rh2+ 34. Kg3 R8h3+ 35. Kxg4 Rh4+ 36. Kg3 R4h3+ 37. Kg4 \u00bd-\u00bd<\/strong>. <\/p>\n\n\n\n

So: What did Black do wrong? For me, of course, it’s more relevant to ask what White did wrong. I drew this game because I did not have a winning mindset. I took way too long in the opening (47 minutes for the first 10 moves) even though it’s one I should know. And then on move 17, the one this post started with, I took 24 minutes, which was ridiculous. Yes, I had to process the shock of realizing I was in trouble, but that shouldn’t take 24 minutes. As a result, when we got to move 30 — a position where I had to think creatively and deeply — there wasn’t enough time to do it.<\/p>\n\n\n\n

After four rounds of the tournament, we have a clear (and surprise) leader, class-A player Eric Steger, who beat Juande Perea to go to 4-0. What a sensational start for Eric! As the number 13 seed, he has already beaten the #2 seed (Wladimir Getselevich) and the #3 seed (Perea). Next week he will have a chance to make it a trifecta, because he will probably be paired against the #1 seed, Mike Splane. The standings are:<\/p>\n\n\n\n

  1. Eric Steger (4-0)<\/li><\/ol>\n\n\n\n

    2-4.  Mike Splane, Paulo Santanna, Michael Ho (3\u00bd-\u00bd)<\/p>\n\n\n\n

    I\u2019m in a five-way tie at 3-1. We have a week off for Thanksgiving, so I\u2019ll be back with an update in two weeks.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Last night, in the fourth round of the Kolty Club Championship, I was paired against an expert, Chris Atkeson. We played what I think was a really high-quality game\u2026 and as it usually happens in games where nobody makes an obvious mistake, we drew. It was a draw that both players were happy with (at […]<\/p>\n","protected":false},"author":80,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[37,1363,11,16,12,1],"tags":[4419,4418,4082,371,5,4421,530,4420,2757,1151,4417],"class_list":["post-5988","post","type-post","status-publish","format-standard","hentry","category-chess-clubs","category-current-news","category-games","category-positions","category-tournaments","category-uncategorized","tag-alekhines-gun","tag-christopher-atkeson","tag-eric-steger","tag-king-safety","tag-kings-gambit","tag-perfect-play","tag-perpetual-check","tag-play-on-both-sides-of-the-boarde","tag-puzzle","tag-rybka","tag-winning-mindset"],"_links":{"self":[{"href":"https:\/\/danamackenzie.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/5988","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/danamackenzie.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/danamackenzie.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/danamackenzie.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/80"}],"replies":[{"embeddable":true,"href":"https:\/\/danamackenzie.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5988"}],"version-history":[{"count":3,"href":"https:\/\/danamackenzie.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/5988\/revisions"}],"predecessor-version":[{"id":5996,"href":"https:\/\/danamackenzie.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/5988\/revisions\/5996"}],"wp:attachment":[{"href":"https:\/\/danamackenzie.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/danamackenzie.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/danamackenzie.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}