Puzzles

Jammo’s Chess Puzzle #119

Written by Robert Jamieson on 9th Mar, 2012

I play a bit of on-line chess at play.chesskids.com.au and its great fun …. but there is a problem.   Sometimes players seem to improve rapidly out of the blue and start beating everyone.   The suspicion of course is that they are using a chess computer to help them, but how do we catch them out?   We can put the moves of the game through our own chess engine afterwards and see if they are the same, but chess is such a complicated game that even chess computers don’t always agree on what is the best move.   And what if our sneaky opponent is only using the computer at the critical part of the game?

I recently had a complaint from several players that a certain “J-Rules” was cheating.   I played through a lot of his games and certainly he went from being an average player to winning 42 out of his last 45 games, some against very strong opposition.  The fact the he generally played 15 minute games (instead of a faster game where there is less time to consult a computer) was suspicious.  The clincher for me however was the following position.  J-Rules, playing White, is winning easily.  Black is attacking the N on f3 but White has several promising lines to choose from.   My candidate moves would be 1.Qxe6+, 1.dxe6, 1.Bg5 or 1.Nd4 all of which look good.   The line played by White won quickly and was quite pretty, but could an average junior playing a relatively fast game have found such a nice variation?   I doubt it.   Have a look at the position yourself a decide what you would play and compare that with the actual line played.   And, of course, NO CHEATING, or you may end up in my next blog.

r2qkb2/pbp3r1/1p1pp2Q/3P4/2P3p1/2N1BN2/PP3PPP/R4RK1 w q – 0 16r2qkb2/pbp3r1/1p1pp2Q/3P4/2P3p1/2N1BN2/PP3PPP/R4RK1 w q – 0 16White to play and win.

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Jammo’s Chess Puzzle #118

Written by Robert Jamieson on 2nd Mar, 2012

I’m a bit of a stirrer at the best of times and I thought that you might be interested in an amusing incident that happened to me this week.   I was giving a private lesson to Max, a 14 year-old boy rated about 1400, and we were near the end of a game I was showing him.  White was a pawn ahead (see diagram) and I told Max that White now had a killer combination to finish off the game.   Max tried one move.  No that was not it.   He tried another move.  No, that was not it either.   He tried a third move – which went close to losing instead of winning!   Carl Gorka was about to start his beginners’ class about this time, so in desperation I turned to a little boy seated next to us.   “What’s your name I enquired?”   “Daniel” he replied.  ”And what’s your rating Daniel?” I asked.  ”about 500″ he replied.   “Well Daniel,” I said, Max here is rated 1400 and he needs your help.  Can you find a winning move for White in this position.”   The little boy, looked for a second the said “I’d play this move.”   You guessed it!   It was the winning move.   Poor Max blushed a little and said “I don’t have much imagination.”

Do you, dear reader, have a good imagination?   Can you do as well as little Daniel?  Today’s puzzle is to find the winning move that Max missed.

6k1/p2bp1q1/1pn5/3pP1PQ/3P2N1/1P1B4/P7/6K1 w – - 0 16k1/p2bp1q1/1pn5/3pP1PQ/3P2N1/1P1B4/P7/6K1 w – - 0 1White to play and win.

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Jammo’s Chess Puzzle #117

Written by Robert Jamieson on 24th Feb, 2012

RJ Shield - Nicole v William

Last Sunday was the first RJ Shield tournament for the year and we had a good turn-up of 43 keen young chess players plus assorted parents.   Nicole Chin (pictured left) scored a perfect 6/6 to win the Open Division whilst Alistair McCutcheon won the U10 division with 7/8.

I had planned to record some of the games on my iPad for my on-line coaching lessons but instead was co-opted to help Frank Meerbach run the tournament.  I only had time for one quick sortie to have a look at the play when two of our training squad members, William Maligin and Gary Lin were paired against each other.   Fortunately I arrived to look at the board (see diagram below) at a very interesting position which I spent a few seconds analysing but did not reach a final conclusion.   Shortly thereafter the game finished and my enquiries revealed that only 3 more moves were played from the diagrammed position before it was all over.   Black had chosen a different line to the one that I was looking at and when I went home and ran the position through my computer it came up with a totally different line that we had both missed.

So today we have a three part puzzle!

A) What were the 3 moves from the diagram to the end of the game?

B) What line did I look at where the losing player could have defended better?

C) What “killer” move did the computer find that totally reversed the result of the game?

1r4rk/5pp1/5b1p/4n3/p1p1P3/4BP1R/2K2P1P/6R1 w – - 0 11r4rk/5pp1/5b1p/4n3/p1p1P3/4BP1R/2K2P1P/6R1 w – - 0 1White to play - what is best play for both sides? Read more…

Jammo’s Chess Puzzle #116

Written by Robert Jamieson on 16th Feb, 2012

Smirnov v Jordan

The game that perhaps attracted the most interest in the recent Australian Championships was the clash between the oldest player, 55 year-old FM Bill Jordan (who was once ranked in Australia’s top 10) and the youngest competitor, 10 year-old Anton Smirnov.  Jordan held a healthy lead in rating points and experience on young Anton and so was expected to win comfortably.

Indeed, after the exchange of a few pieces they reached the following position with Jordan playing White.   Black is threatening to win the c4 pawn but Bill has a nice space advantage and the better pawn structure so all is going well.   Surely it should just be a matter of technique for White.   Unfortunately, we older players sometimes tire a bit during a hard game and make mistakes, and Bill is certainly getting on so perhaps you could give him a bit of help.   What should he play to keep his advantage?

3r4/pp2p1bk/1np3pp/4N3/2P3P1/2B4P/PPb2PB1/4R1K1 w KQkq – 0 13r4/pp2p1bk/1np3pp/4N3/2P3P1/2B4P/PPb2PB1/4R1K1 w KQkq – 0 1What should White play?

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Jammo’s Chess Puzzle #115

Written by Robert Jamieson on 9th Feb, 2012

Over the recent holidays we not only had the Australian Championships but also the Australian Reserves Tournament for players deemed not to be of Championship standard.   This event was particularly exciting this year largely because of the participation of 3-times Australian Champion Doug Hamilton, now in the veteran category, who decided to forgo the Championship and play in the Reserves.    How would the veteran go against the up-and-coming juniors and players around 1900 rating in the Reserves?

Doug managed to fight his way to the top board by round 10 but, as so often happens when we get older, was brought down by a blunder just before the time control in his game against Frank Lekkas.   Doug has always been a perfectionist, seeking after the very best move in each position, but his old enemy of time trouble stepped in to bring about his downfall.   Can you, I wonder, without any time pressure, do better?

White is a pawn ahead but must defend hi “h” pawn.   What should he play?

5rk1/1b3pp1/p6r/2pPq1p1/2B3Q1/1P3P2/P1R3PP/5RK1 w – - 0 15rk1/1b3pp1/p6r/2pPq1p1/2B3Q1/1P3P2/P1R3PP/5RK1 w – - 0 1Should White play 1.h3, 1.g3 or 1.Qg3

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Jammo’s Chess Puzzle #114

Written by Robert Jamieson on 7th Feb, 2012

Schools are back and Chess Kids is now in full swing for 2012.   One new thing that I’m very excited about is that we have an Aus. Junior Training Squad consisting of around 25 aspiring juniors spread over three states who are already in training for the 2013 Australian Junior Championships in Queensland.    My role is to do an online training lesson each Thursday night which involves me having one junior receiving a private lesson “online” with the other squad members looking on and commenting.  It should be fun and hopefully the kids will learn a lot over the course of the year.   We have promised them each a 200 point rating increase so the pressure is on!    The squad even has its own website, www.chessstraining.com.au, which will include recordings of the lessons for the kids to playback at their leisure.

 

Part of the program requires the squad members to play games at Chess Kids Online and thus supply me with material for their lessons as well as a chance for them to implement their new ideas.    I was online last night going through some games and I stumbled across a very interesting position that may contain a brilliant tactic that the players missed.   Have a look and see if you can spot it.

r1bqkbnr/pp4pp/2p2P2/8/2P1p3/2p3P1/PP2PPBP/R1BQK2R w – - 0 1r1bqkbnr/pp4pp/2p2P2/8/2P1p3/2p3P1/PP2PPBP/R1BQK2R w – - 0 1Does White to play have a winning tactic?

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Jammo’s Chess Puzzle #113

Written by Robert Jamieson on 3rd Feb, 2012

Welcome back to Jammo’s chess puzzles for 2012.  I’ve collected quite a few interesting positions to show you over the next few weeks.  It’s certainly been a great Summer of chess with the Australian Championships in Geelong, the Australian Junior Championships in Melbourne and then the Queenstown Chess Classic in New Zealand.

I only attended the Junior, where I had to give a speech at the opening ceremony to give a bit of advice to our young players, but I avidly followed the other events on-line each day.   The prize for the silliest play of the Summer goes to Max Illingworth against Yi Lui at the Australian Championships (see diagram).  A close second is Max Illingworth (!) for his draw in NZ with  GM Zhao Xue where Max went from R+B+4P v R+N+1P to R v R+N.  Yes, he lost his B and 4 pawns for just one pawn!  Not to be outdone he played on for 79 moves without a pawn move or capture before finally claiming a draw under the 50 move rule.  Now that’s fighting spirit!

Anyway, in the diagram Max has White and his has played a nice combination to win a rook for a couple of pawns. Now 1.Qe1 would quickly bring about a comfortable victory.   Instead Max played the worst move of the tournament which allowed his opponent to immediately turn the tables.   What was Max’s blunder and his opponent’s devastating reply?

rn5R/pp2kpp1/4p1p1/3p4/1q3Pn1/3Bp3/PP2K1PP/2BQ3R w – - 4 9rn5R/pp2kpp1/4p1p1/3p4/1q3Pn1/3Bp3/PP2K1PP/2BQ3R w – - 4 9White to play a huge blunder and lose!

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Jammo’s Chess Puzzle #112

Written by Robert Jamieson on 16th Dec, 2011

Tonight is the Chess Kids Xmas Party!   Yes, all the Chess Kids coaches and staff get together at the Guru’s house for a lavish party with gourmet catering by the Guru’s lovely wife, Kate.   And what do we do at the party?   Play chess of course!   I particularly like catching up with Frank Meerbach, who coaches in the Doncaster area, as Frank always has a few chess puzzles to challenge and enthral his audience.   It’s also good because he is the only person there who is older than me!

This year I’ve been preparing some puzzles of my own to try and catch Frank at his own game.   My method is simple.  I go onto “Chess Tempo” and find the most difficult puzzle that I can’t solve and make that the one that I give to Frank.   I must warn you, the one I have chosen is pretty hard, though not very deep, so you can have a go at solving it yourself if you like.   I only ask one favour.   If you do solve it, please don’t tell Frank!

8/1P1RN1PP/3r1PK1/4q3/2P1p3/4bp1Q/1p2kp2/8 b – - 0 18/1P1RN1PP/3r1PK1/4q3/2P1p3/4bp1Q/1p2kp2/8 b – - 0 1Black to play (moving up the board) and win

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Jammo’s Chess Puzzle #111

Written by Robert Jamieson on 9th Dec, 2011

Short v Anand

There is a very big chess tournament in progress at the moment – the London Chess Classic 2011 which features four players rated in the 2800s (plus 5 others), namely Carlsen 2826, Anand 2811, Aronian 2802 and Kramnik 2800.   Anand is the World Chess Champion and Kramnik is a former World Champion.   You can follow the games live on the internet but unfortunately they don’t start until about midnight Melbourne time.   One commentator called it the strongest chess tournament ever held in Britain.   I’m not so sure.

In rating terms it may well be the highest rated ever but everyone knows that ratings have inflated over time and there have been a few strong tournaments in Britain before.   Hastings 1895 apparently wasn’t too bad, but it was a bit before my time.   My choice would be Nottingham 1936 which featured Botvinnik, Capablanca, Lasker, Alekhine and Euwe (plus others) who between them held the world title between 1894 and 1957 inclusive!   I think that I’d pick them in a match against the current mob.

There has however been some very interesting chess being played in the current tournament.   Nakamura v Howell in round 5 was a nice tactical skirmish which I may well publish in “On the Move.”   Meanwhile for today’s puzzle place yourself in the shoes of the current World Champion, Anand, as Black to play in the diagram against Short.   He can play 1…Qf4+ to swap off queens but that gives him isolated and doubled pawns.  Would his extra pawn then be enough to win?  You decide.

8/5p2/5qk1/6p1/1Q5p/7P/6PK/8 b – - 0 18/5p2/5qk1/6p1/1Q5p/7P/6PK/8 b – - 0 1Should Black play 1...Qf4+?

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Jammo’s Chess Puzzle #110

Written by Robert Jamieson on 2nd Dec, 2011

Allen Yu v Luke Li in the final round

I’ve just come back from an exciting three days of chess at the Campaspe Downs Resort (near Kyneton) including the final of the RJ Shield for 2011 and the National Schools Open featuring teams from all over Australia and New Zealand.

Auckland Grammar brought across a very strong team of players over 2000 rating and ran out easy winners but Glen Waverley Secondary also did well to finish second and be the top Australian Team.  The full scores are available on the tornelo website.

At the other end of the room, on the bottom boards of the Primary Competition, play was not quite at the same level.  I watched one game (which I then included in my lecture on blunders) where, in 13 moves (for White and Black) White missed capture of a rook, a stalemate chance and allowed mate in one.  Black in turn blundered his rook, allowed a stalemate chance, missed mate in one then stalemated his opponent when a rook and pawn ahead.  It’s hard playing chess when you don’t look even one move ahead!

There was some good chess played on the top boards however.  My favourite game was Kingsley Chung v Allen Yu which will be published with Allen’s notes in the next issue of “Knight Times”.    I glanced at the game whilst walking past and ended up standing there for five minutes trying to work out all the complications.  Allen played like Mikhail Tal (fondly dubbed the “Magician from Riga”) to finish on top in the complications.   Here is a position from the game with Black to play.  He is ahead on material but the position is still a bit messy.  What is his next “killer” move that wraps up the game.

1k1r3r/ppp2ppp/2P5/7B/1b2p1Q1/2P1B2P/PP3PPq/2R1K3 b – - 1 171k1r3r/ppp2ppp/2P5/7B/1b2p1Q1/2P1B2P/PP3PPq/2R1K3 b – - 1 17Black to play

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