Tying up some loose ends

Today I’m going to post some solutions and oddments as a means of bringing a few discussions to a close.

First of all, my “Bent Double” puzzle which I set for you to ponder when I posted my tribute to the Great Dane a couple of weeks ago. The solution is given below:

Congratulations to Fruitcake who claimed the proffered prize (a pint of his choosing at our beloved home venue, The Trades Club) on Monday night. The solution really is quite marvellous. It is quite hard to find simply because it doesn’t really fit with any standard mating patterns. Usually chess puzzles (especially mating solutions) can be solved by looking for well known and frequently recurring patterns and themes amongst the pieces in the starting position. Well done Fruitcake!

Now onto more serious matters… A couple of weeks ago I demonstrated that the final position of the final game in the final round of the Hebden Bridge Chess Club Lightening Competition contained hidden depths. The game between father and son Dave Wedge and Matthew Wedge-Roberts was adjudicated to be a win for white (Dave) and no one in the room could have argued with that for he was an exchange up in an apparently straightforward end game.

However, on closer inspection it turned out that the position was not at all easy to win for white. Indeed, I casually played out the game against my computer and found it to be quite tough. Therefore I asked readers of this blog to contribute solutions. I’m happy to say that the main protagonist himself has come forward with a methodology for white to win. I publish this along with my original notes below. In my view this endgame study is highly instructive and I encourage all readers to spend a bit of time running through it.

My thanks go to Dave for taking the time to find the answer. I hope he found the process of uncovering it as interesting as I did failing to find it!

Finally, I’d like to post a witty little denouement to a blitz game that I played last week at my other club, Leeds. I was playing white and feeling pretty glum in the position given below. I had been well ahead in the game and successively blundered away my advantage. Now I seemed destined to lose. But then, I managed to find a nice defensive resource. What does white play in the position below? Try to find the solution before hitting the “forward” button.

Following on from an article I posted a month or so back about knowing the right time to resign I’d like to offer this example as evidence to support the argument that, in blitz games, you really should play on in a theoretically lost position for as long as possible because you never know what might turn up!

Rules Are Meant to be Broken

Today I’d like to introduce a new columnist to Chessticles readers. Because he is an eminent figure in the British judicial system (as well as a very strong chess player) he has chosen to use the nom de plume “M’Lod”. Readers will not be surprised to hear that he has been commissioned to ramble eccentrically about the laws of chess. When I say this however I refer not to the rules and regulations that govern the way the game is played but instead the “theoretical laws” that have been laid down for students of the game to follow by experts and tutors over the years. M’Lod will examine a case study in each of his columns and assess how the evidence it contains either supports or disproves the particular “law” that is being evaluated. Over to you M’Lod.

Silence in court! Let us begin.

When beginners are learning the game one of the first rules they are taught is the value of the pieces. The accepted theory is that Pawns are worth 1 point; Knights and Bishops 3 points; Rooks 5 points and the Queen 9 points. It is a simple way of assessing the balance of material on the board and in most cases a material advantage for one side or the other is decisive.

Unfortunately, the law is rather crude and needs further legislation in order to be enforced with any degree of reliability. For example, in the end game pawns assume a much greater value than they do in the earlier stages of the game as they have the opportunity to promote to a queen. Every pawn therefore has a potential value of 9 points and this dynamic can create chaos when it comes to assessing the merits of a position. One moment a pawn isworth 1 point, the next it is worth 9. How can this happen? Examine the evidence below if you will.

Case A – “Pieces are worth more than pawns”

Evidence – Ortueta vs. Sanz, Madrid, 1933

It is black to play in this position. A cursory assessment of the situation suggests that, although the material held by the two sides is equal, positionally, white is rather better. His knight is more active than black's passive bishop and black's doubled c-pawns are a potential weakness. Unfortunately they are also potential queens and black exploits this in a rather elegant fashion by playing...

1. ... Rxb2!

Black is sacrificing his rook, but, in the process the value of his pawn on c4 has just increased as it is now a passed pawn.

2.Nxb2 c3

Already white finds himself in a spot of bother as, in order to stop the pawn he must play 3.Nd3. Sadly this will be met with 3....c4+ 4.Kf1 (4.Rxb6 cxd3 is winning for black) cxd3 5.Ke1 c2 6.Kd2 Be3+ sacrificing the other piece in order to promote his c-pawn which has suddenly assumed a 9 point value! In order to continue white must give back the exchange by playing...

3.Rxb6 c4!!

A truly stunning reposte! Black isn't interested in regaining the rook. All that matters is queening the c-pawn and in order to do that he must prevent the white knight getting to d3 which he would suceed in doing after 3...axb6 4.Nd3. A purely material assessment of the position now shows that white is 8 points (Rook = 5 and Knight = 3) ahead but of course black's pawn on c3 is worth a lot more than 1 point right now.

4.Rb4 ...

This is white's only hope right now as if 4.Rc6 then cxb2 will get the pawn home on the b-file. Now if black takes the knight with 4...cxb2 then 5.Rxb2 and if 4...c2 then 5.Rxc4 and white stops the pawn. Black therefore declines to regain the material once again.

4. ... a5!

The coup de grace!

5.Rxb4 cxb2

With b4 and c1 unavailable to white's rook black's pawn can't be stopped and has achieved its maximum potential value therefore white resigned.

Of course the evidence this game provides is a rather melodramatic, if exceedingly elegant means of disrupting the accepted order. Never the less it surely proves that a simplistic and rigid application of piece values is destined to get players into trouble. I would therefore recommend that the following amendments be made the law we are examining today.

Suggested amendments to the “Pieces are worth more than pawns” rule

1. Pawns have a dynamic value that ranges between 1 and 9
2. The longer a game continues the greater each pawn’s potential value become
3. The closer a pawn comes to its queening square the greater its value become
4. Pieces only retain their value over pawns if they can prevent a pawn from queening without sacrificing themselves

I believe there are further amendments to laws about the relative value of pieces that must be considered but let us adjourn today’s proceedings and continue this discussion another time.

Plenty of Room for Improvement!

Today I give you an endgame position that I contested over the board recently. Endings are one part of my all round game that I’ve identified for remedial work. Many of my games never culminate in tight end games due to the fact that I’ve normally secured or conceded a decisive advantage by this stage of proceedings. Never the less if I’m going to improve my results I need to get better at playing endings. Recently I’ve been dipping back into the antique master work “How to Play Chess Endings” by Eugene Znosko-Borovsky and, although the going is heavy I felt like I was starting to make some progress. It seem I was wrong!

The game below gave me my first opportunity to my new found understanding to the test and I fear that I rather let the side down. The most challenging aspect of endgame play is the high degree of accuracy required. Judgement plays less of a role in this stage of the game and calculation becomes much more important. Even the smallest error can change the outcome of proceedings. Take a look at the position below.

White has just offered black the opportunity to exchange the knights off the board (with 33.Nd2) and enter into a king and pawn endgame. Should black accept or decline this offer? My recent studies have taught me that it is wise to have a clear idea of the theoretical outcome of the resultant position and how it should be approached before making a choice. King and pawn endings have concrete assessments you are either “winning”, “drawing” or “losing” there is no “unclear” or “equal” assessment. I figured that I was winning as after exchanging the knights I could play my king to d5 via e6, assume the opposition and eventually break through to win a pawn on the king’s side.

Unfortunately it isn’t that simple. I needed to look more carefully at the situation of the pawns on each side of the board. Who will be able to create a passed pawn most easily and who (without intervention from the enemy monarch) will be able to queen a pawn the quickest? The reality is that black must play with the upmost care to keep control over white’s king’s side pawns.
Play continued…

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It’s pretty depressing to think that if it’s possible to make this many errors in a “simple” king and pawn ending then a more complex ending must be very difficult indeed!

A Heavyweight Encounter

Well, it’s been a few months since I posted now. Time flies when you are having fun! My wife and I went to South Africa for our honeymoon for a couple of weeks and had the most amazing time. Of course when you get back from such an amazing adventure it’s easy to feel a bit jaded and restless. Between that and the build up to Christmas I simply haven’t got round to posting. The longer it’s been the harder it is to break back into it. Now that I’ve written this post I can feel the momentum building again!

The main impetus for this post was to report on the epic showdown between my team, Hebden Bridge A and Huddersfield in the Calderdale League. Both teams came into the match unbeaten. Indeed, neither team had even lost one game! As you may remember me relating in one of my earliest posts, Huddersfield are the current champions, the strongest team in the league on paper and the favourites to win again this year as a result. I gave us a chance of upsetting the established order at the beginning of the season, but thought it would be difficult for us.

We played the match on neutral territory in Halifax as Huddersfield’s usual home venue wasn’t available and this possibly gave us a tiny psychological advantage as I’d guess that “fortress Huddersfield” has not been breached in the Calderdale league for a number of years.

As we were the “away” team, we played with black on all boards and were marginally out-graded on every board except the top board (where both players had the same grade).Unusually for a fixture at this level the game on board one was the first to finish and it finished in our favour. Our top board seems to have Huddersfield’s top board in his pocket at the moment. He scored 1.5/2 against him last season and I’d not be surprised if he repeats or improves on this result again this year. It would certainly be fair to say that Huddersfield’s board one needs to revise his choice of openings if he is to try and buck the current trend. He played a Four Pawns Attack against our man’s Benoni and (as I’ve tried this line against him myself on several occasions) I can vouch for his ability to absorb the pressure and then kill you on the counter attack. 0-1 to Hebden Bridge.

Next to finish at the other end of the match was board five. Huddersfield’s captain equalised the match score by taking advantage of a positional slip from our player fairly early in the opening. White won a pawn and maintained a positional bind that our man couldn’t break. The rest was about 2 hours of torture. 1-1

The remaining three boards went right to the very death and, as the tension in the room started to become really acute I managed to salvage a draw in my game on board 4. I had gained a pretty good position out of the opening and begun to start looking for ways to press for an attack when I over looked a defensive resource and lost a knight for a pawn. The only other compensation was that I had a good initiative and some pressure against my opponent’s king which meant that I was pretty much obliged to just “go for it”. My opponent defended accurately but in fending off my attack he lost another pawn. It came down to an end game where I had a knight and four pawns against white’s bishop, knight and two doubled pawns and I was able to hold on for the draw and even overlooked a possible winning chance (see below). So with two games to finish it was still level pegging.

In the position above, I'd been hanging on for a while and by now was fairly confident I could hold for a draw. "Oliver" has just played 46.Bc3 to which I replied (pretty much straight away I'm ashamed to admit) with Ne4. Of course had I thought for a few minutes I might have found:

46...g5+! 47.Kxg5 Ne4+ 48.Kf4 Nxc3 winning back the bishop and maintaining a pawn advantage. It must be said that the resultant position looks hard for black to win but I could have had fun trying!

Next up our board three took a full point with a win on time. He had the better position when the game ended and had put his opponent under pressure for a long period. This had translated into a big time advantage on the clock which proved decisive. Suddenly we were up one point with one game to finish and looked like we might pull off a massive upset.

On board two our captain had been holding on in a tricky position for a long time. In a double rook ending Huddersfield’s man had a space advantage but it looked very difficult to exploit. Right up until the end it looked like our captain’s rear guard action would get us the draw we needed but sadly it wasn’t to be. White managed to get a passed pawn and it was all over. Final score 2.5-2.5!

What all this means is that Hebden Bridge A have a tiny advantage in the league based on our better “board count” in all matches (we have 19 wins to Huddersfield’s 16 over 5 matches played each).However, before the half way point is reached we still have to play our B team (who are third in the league) and Huddersfield play Halifax (who are bottom) so that points gap could be reduced to 1 point if we only win 3-2 and they win 5-0, which is entirely plausible.

So, if neither side drops any points for the rest of the season it could all come down to the last match in April when we will be at home and playing the white pieces. That is a fairly mouth watering prospect. Now we need to make sure we reach that match unbeaten!