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  1. #16
    CC FIDE Master Southpaw Jim's Avatar
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    I recently bought Silman's new book on endgame technique - in it, he claims that he's faced KBN v K once in his entire career, and IM John Donaldson has never seen it. On this basis, he deliberately and openly omits KBN v K from the book entirely!

  2. #17
    CC Grandmaster Capablanca-Fan's Avatar
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    I must disagree with Silman here though. Capablanca's Chess Fundamentals taught the technique. It is a good exercise in cooperation of the pieces.

    I could understand omitting K+3N, but that is easier anyway. Also, K+3N dominate K+N. Once I had to win 2NvP in an Internet blitz game (increment IIRC), and that comes up every so often.

  3. #18
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    I have just taught Anton how to mate with N and B. He managed to mate me 3 times in a row. Still a little bit shaky at the moment, but believe me or not in a week time he will be comfortably mating with less than 2 minutes on his clocks. Kevin, you want a bet that 6-year-old can mate you with N and B in less than 2 minutes?

  4. #19
    CC Grandmaster Capablanca-Fan's Avatar
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    Quote Originally Posted by drug
    I have just taught Anton how to mate with N and B. He managed to mate me 3 times in a row. Still a little bit shaky at the moment, but believe me or not in a week time he will be comfortably mating with less than 2 minutes on his clocks. Kevin, you want a bet that 6-year-old can mate you with N and B in less than 2 minutes?
    That's impressive! Most 6yos would have trouble with K+QvK.
    “The destructive capacity of the individual, however vicious, is small; of the state, however well-intentioned, almost limitless. Expand the state and that destructive capacity necessarily expands, too, pari passu.”—Paul Johnson, Modern Times, 1983.

  5. #20
    CC International Master
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    Anton just managed to beat (K+N+B vs K) a 2450 IM. Anton had only 5 minutes on his clocks. Still needs some practise but already not too bad. Not many 2000 players can do that. The IM was really impressed.

    Then I had a go against him (K+N+B vs K). The first time it took me 1 minute. The second time I finished the game in 30 seconds. I wander if anybody can do that in less than 15 seconds?

  6. #21
    CC Grandmaster
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    Quote Originally Posted by drug
    Anton just managed to beat (K+N+B vs K) a 2450 IM. Anton had only 5 minutes on his clocks. Still needs some practise but already not too bad. Not many 2000 players can do that. The IM was really impressed.

    Then I had a go against him (K+N+B vs K). The first time it took me 1 minute. The second time I finished the game in 30 seconds. I wander if anybody can do that in less than 15 seconds?
    Wow! That is mightily impressive.

    My sole experience of KNB vs K was long ago as a junior. A prominent junior arbiter (and coach) at the time asserted that KNB vs K was a draw (I think in the context of a game that nearly ended up in it). I told him he was wrong, and he didn't believe me. In order to persuade him I had to go away and learn it and then proceeded to beat him with it a few times.

    In hindsight, it is possible that he only said it was a draw in order to induce me to learn it (if so, smart psychology), but I think he genuinely believed it at the time..

  7. #22
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    Quote Originally Posted by pax
    My sole experience of KNB vs K was long ago as a junior. A prominent junior arbiter (and coach) at the time asserted that KNB vs K was a draw.
    He is probably right in 50% of the cases
    For private coaching (IM, four times VIC champion) call or SMS 0417519733
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  8. #23
    CC Grandmaster
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    There are three much more difficult endgames where even the strongest grandmasters stumble:
    KR v KN
    KRN v KR
    KRB v KR

    some others are also quite remarkable, like KBB vKN, KNN vKp, KQp v KQ, etc.
    For private coaching (IM, four times VIC champion) call or SMS 0417519733
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  9. #24
    CC Grandmaster Capablanca-Fan's Avatar
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    I saw a video by IM (now GM) Jesse Kraai demonstrating two top-10 GMs mishandling KQ v KR, and allowing a draw IIRC. The main thing the stronger side missed was the win in this position (or symmetry-related variants):

    PGN Viewer
     
    Last edited by Capablanca-Fan; 07-08-2007 at 05:21 PM.
    “The destructive capacity of the individual, however vicious, is small; of the state, however well-intentioned, almost limitless. Expand the state and that destructive capacity necessarily expands, too, pari passu.”—Paul Johnson, Modern Times, 1983.

  10. #25
    Monster of the deep Kevin Bonham's Avatar
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    I have had KQ vs KR in a tournament game twice! First time with no increment I lost on time while reaching out to play mate in one and blew $150. Second time I had a ten-second increment and won.

    I had a drawn KR vs KN once in which the defender at one point for one move strayed into a lost position but I missed the win, $160 lost there.

    I failed to win KRBP (rooks pawn) vs KR in a simul vs GM Johansen a very long time ago.

  11. #26
    CC Grandmaster Garvinator's Avatar
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    During the 2007 Peninsula Open, Peter Froehlich had KQ v KR against Jacob Edwards (2065 acf) in a 90/10 game.

    With both players surfing the increment, Peter managed to drop his queen cold.

    It certainly deserved to be in the pits/shockers thread. I was not actually present for this event, but was playing in the tournament.

  12. #27
    Monster of the deep Kevin Bonham's Avatar
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    Quote Originally Posted by ggrayggray
    With both players surfing the increment, Peter managed to drop his queen cold.
    Ouch.

  13. #28
    CC Grandmaster Capablanca-Fan's Avatar
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    Quote Originally Posted by ggrayggray
    During the 2007 Peninsula Open, Peter Froehlich had KQ v KR against Jacob Edwards (2065 acf) in a 90/10 game.

    With both players surfing the increment, Peter managed to drop his queen cold.

    It certainly deserved to be in the pits/shockers thread. I was not actually present for this event, but was playing in the tournament.
    Yeah, saw that. Peter didn't realise that he had put his Q en prise, but the arbiter saw it too.
    “The destructive capacity of the individual, however vicious, is small; of the state, however well-intentioned, almost limitless. Expand the state and that destructive capacity necessarily expands, too, pari passu.”—Paul Johnson, Modern Times, 1983.

  14. #29
    CC Grandmaster Capablanca-Fan's Avatar
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    Quote Originally Posted by Kevin Bonham
    I have had KQ vs KR in a tournament game twice! First time with no increment I lost on time while reaching out to play mate in one and blew $150. Second time I had a ten-second increment and won.

    I had a drawn KR vs KN once in which the defender at one point for one move strayed into a lost position but I missed the win, $160 lost there.

    I failed to win KRBP (rooks pawn) vs KR in a simul vs GM Johansen a very long time ago.
    Bummer. Even with the B and RP of the wrong coloured queening square, it should be a win with Rs on, e.g. Capablanca vs Tarrasch, St. Petersburg 1914.
    “The destructive capacity of the individual, however vicious, is small; of the state, however well-intentioned, almost limitless. Expand the state and that destructive capacity necessarily expands, too, pari passu.”—Paul Johnson, Modern Times, 1983.

  15. #30
    Monster of the deep Kevin Bonham's Avatar
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    Quote Originally Posted by Jono
    Bummer. Even with the B and RP of the wrong coloured queening square, it should be a win with Rs on, e.g. Capablanca vs Tarrasch, St. Petersburg 1914.
    It was wrong-coloured square and my error was to push the pawn too far, ending up having to give it up, and then I couldn't win the KRB vs KR that resulted. (He was down for another couple of simuls the next year and I managed a win in one of those. These were in the days when I was strong-ish but not really an outright local tournament threat, probably about 1800 strength in today's terms.)

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