24 April 2021

Chessgames.com Start Position XREF

In last week's post, SP864, Reddit, Chessgames.com (April 2021), I wrote,
Chessgames.com: I [...] discovered that the book was structured as an introduction to chess960 from several angles. Unfortunately, it had a big problem. The start positions used Chessgames.com numbering which is non-standard.

I also said,

I've mentioned the Chessgames.com pitfall many times on this blog, but the problem needs a more permanent warning.

To make progress, I created a cross-reference (aka XREF) between standard start position (SP) numbers and Chessgames.com numbers. I uploaded the cross-reference to my own site as a new page:-

I tested the cross-reference on a discrepancy documented in a previous post, Champions Showdown, St. Louis (September 2018), where I wrote,

I noticed one anomaly that I don't understand. The official site's 'Results' page noted the start positions and their numbers for each round, but the numbers don't correspond to the system that I'm familiar with. For example, it gives the first day using 'Position 598: NQBBRKRN'. I prepared the following table for this post, where the first column is the round number and the second column is the numeric start position:-

1: SP309 NQBBRKRN
[...]

Indeed, the chess960 standard number SP309 is the equivalent of the Chessgames.com non-standard number 598. Another unsuspecting soul had fallen into the Chessgames.com trap.

My cross-reference is crude and lacks the HTML tags that make a proper web page. I'll improve it as soon as I can and, at the same time, integrate it into my other chess960 resources.

17 April 2021

SP864, Reddit, Chessgames.com

In the few weeks since since my previous post, I've received three noteworthy messages worthy of separate posts. I'll list the messages here according to the order in which I received them.

SP864: The first message was a comment by Andrey D. to my most recent post, TCEC C960 FRC3, (March 2021):-

You might be interested in knowing the solution for Black in a particularly difficult SP we once discussed.

In fact, there are two 'particularly difficult' SPs that are related by switching two pieces. I'll reference them via my 'Database of SPs'. The first is:-

The second is:-

I include a second link for SP868 because I haven't updated the database since I wrote the post two years ago. At the end of this post, I've attached a substantial portion of Andrey D.'s comment in PGN format. It's an important discovery.

Reddit: The second message was an email. My email address can be found on my profile linked in the top right of every page in this blog ('View my complete profile'). The message said,

Maybe you could share some of your articles on /r/chess960, which is pretty much dead.

I replied,

Please feel free to link any of my blog posts on Reddit.

If I could find the time, I would be more proactive than that. The Reddit topic is at chess960 related topics (reddit.com). The world needs a public forum to discuss chess960/FRC.

Chessgames.com: The third message was also an email. It had two PDF attachments that were introduced with:-

It is a pleasure for me to have carried out this humble book with the 960 initial positions, obtained from the page chessgames.com, making screenshots of the 960 positions and diagramming them in the "DIAGTRANSFER" software and placing them in my book. It is in Spanish because I am from Argentina.

I used Google Translate to understand the Spanish and discovered that the book was structured as an introduction to chess960 from several angles. Unfortunately, it had a big problem. The start positions used Chessgames.com numbering which is non-standard. I last saw this a year ago in a post about the '2019 Champions Showdown', Spectating Chess960 (April 2020):-

Day 4 started with a curiosity. The first start position (SP784 BBRQKNRN) was the twin of the position on Day 3 (SP175 NRNKQRBB). [...] NB: After choosing the Day 4 position, TD Tony Rich called it 'SP779'. He was using the Chessgames.com Random Position Generator, which does not follow the standard numbering.

I've mentioned the Chessgames.com pitfall many times on this blog, but the problem needs a more permanent warning. A good place to mention it would be my page Chess960 Start Positions (m-w.com). The page appears in the results for various searches and gets a fair amount of traffic. A table converting between the two numbering systems might also be useful.

***

Some GM analysis:-

[Event "SP864"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "W"]
[Black "B"]
[Result "*"]
[Annotator "Andrey D."]
[SetUp "1"]
[PlyCount "0"]
[FEN "bbqrkrnn/pppppppp/8/8/8/8/PPPPPPPP/BBQRKRNN w - - 0 1"]

1.Ng3 c5
  ( 1...f6 )
  ( 1...Nf6 )
  ( 1...g6 )
2.Nh5 f6 3.Nxg7+ Kf7 4.Nh5 Ng6 {This counter-intuitive gambit is in fact very logical upon a closer look; note that White's only piece [pawns included] that has moved so far is his h5-knight which will be forced to retreat soon. Meanwhile Black has already played ...c5 and ...Ng6, and is now intending ...d5 followed by ...Qg4! and ...Nf4!, gaining further tempi. The semi-open g-file can also be used rather by Black than by White [especially if the latter castles h-side].} 5.Nf3 d5 6.b4 b6 7.bxc5 d4
  ( {Morphy-style! However simple} 7...bxc5 {was also fine for Black.} )
8.Qa3
  ( 8.Bxd4 Rxd4 9.Nxd4 Qxc5 {and one of White's knights will be lost} )
  ( 8.cxb6 {ignoring development altogether} 8...Bxf3 9.gxf3 Qh3 {with a number of threats for the sacrificed material.} )
8...Qg4 9.Ng3 Nf4 {the roles are now reversed and it's White who has to play Rg1, because if 10.0-0? then 10...d3! 11.cxd3 Nxe2+ 12.Nxe2 Bxf3} 10.Rg1 bxc5 11.Qxc5 e5 {And Black, who has a very strong initiative for two pawns, went on to win in a long and absolutely crazy fight!} *

I wouldn't be surprised to find a similar line for SP868.

27 March 2021

TCEC C960 FRC3

On my main blog, where I've been tracking the world's two foremost, ongoing engine vs. engine competitions, the most recent fortnightly post, TCEC FRC3, CCC Rapid 2021 : Both Finals Underway (March 2021), noted,
FRC3 [Fischer Random Chess 3] has reached the final match, where Stockfish and KomodoDragon are tied with one win each after 29 of the 50 games have been played. The following chart from the TCEC Wiki shows the different stages of the event.

Here's the chart mentioned in the quote, taken from TCEC FRC 3 (wiki.chessdom.org):-

I ended the post on my main blog saying,

After the final match finishes, I'll have more to say about the tournament on my chess960 blog. I covered the previous edition in TCEC FRC2. In that event, Stockfish beat LCZero +8-0=42.

When I wrote the referenced page, TCEC FRC2 (December 2020) -- which incorporated the same TCEC flow chart shown above -- the TCEC treated chess960 as a second class citizen, reported only in a section of the TCEC Wiki's home page. Since then, the main page section has been promoted to a separate page, TCEC FRC 2 (wiki.chessdom.org), which announces,

Though at the time advertised as [a] Bonus event, the TCEC Fischer Random Chess will as of now be a regular part of seasonal events.

According to the Wiki's history page, the move happened exactly a month ago:-

23:07, 27 February 2021 [...] (moved from Main page)

'Will be a regular part of [TCEC] seasonal events' -- that's one small step for TCEC, one significant step for chess960. The TCEC Wiki's 'FRC 3' page includes a chart showing the scores of the event's four stages.

A similar chart is now available on the Wiki's 'FRC 2' page. In the 'FRC 3' final, KomodoDragon beat Stockfish by a score of +2-1=47. A 94% draw rate echoes the sort of result we expect from a traditional chess match (SP518 RNBQKBNR) between engines. Will the TCEC FRC organizers be forced to dictate the chess960 opening variations, just as they do for SP518? Let's hope not.

Except for an occasional CCRL game, I can't remember ever looking at an engine vs. engine chess960 game. Is there anything to be learned from such an exercise, or is the play of the engines beyond comprehension? Watch this space; if not for FRC3, maybe for FRC4 or beyond.

[The title of my 'TCEC FRC2' post on this blog is nearly identical to the title on the TCEC Wiki, 'TCEC FRC 2'. To avoid confusion in future reports on the TCEC C960 events, I decided to change the title on this current FRC3 post.]

20 March 2021

From Sveti Stefan to Budapest

In the previous post, The Early Evolution of Fischerandom (February 2021), I finished with a question:-
From this we see that Fischer's early [chess960] activities were bunched into two time periods. The first period took place in 1992-1993, when Fischer developed the rules of his emerging invention. The second period took place in 1995-1996, when Fischer revealed his invention to the world. What happened in 1994 and after 1996? Looking at Fischer's other activities in those periods might help answer those questions.

Let's set a starting point at the end of the 1992 Fischer - Spassky Rematch; Sveti Stefan / Belgrade, IX-XI, 1992:-

1992-11-05: g.30, last game of 1992 match

Two of the links in the 'Early Evolution' post cover Fischer's subsequent travels. The first link is [Frank] Brady on Fischer Random (January 2011). There I wrote,

After the [1992] match Fischer stayed in 'Magyarkanizsa, in the northernmost reaches of Serbia, on the border of Hungary'. There he made the acquaintance of the Polgar family and, with their encouragement, later moved to Budapest.

The second link is Chessmaniac, Comments on Chess960 (February 2015):-

'Bobby Fischer's Pathetic Endgame', where the original by Rene Chun is subtitled 'Paranoia, hubris, and hatred -- the unraveling of the greatest chess player ever' (theatlantic.com, December 2002). The portion covering the birth of chess960 takes seven paragraphs, which I'll quote in entirety...

The map below shows the main points in Fischer's travels during 1992-93.


Europe Maps - Perry-Castaneda Map Collection - UT Library Online
see the map 'Eastern Europe (Political) 1993'

Budapest, in the center of the map, is circled. Southeast of Budapest, marked with an asterisk, is Magyarkanizsa [aka Kanjiza], on the border between Hungary and Serbia, not far from Szeged. The city south of Magyarkanizsa is Belgrade, which I haven't marked. Southwest of Belgrade, also marked with an asterisk, is Sveti Stefan, which is not far from Podgorica. In his book 'Endgame', Brady wrote (p.255),

1993-05: 'The Polgars, the royal chess family of Hungary, visited Bobby [in Magyarkanizsa] -- Laszlo, the father, and his two precocious daughters, Judit, sixteen, and Sofia, nineteen. Both girls were chess prodigies. (The oldest daughter, Zsuzsa, twenty-three -- a grandmaster -- was in Peru at a tournament.)'

Judit was also already a grandmaster. Zsuzsa [Susan] visited Bobby when she returned from Peru and convinced Fischer to move to Budapest. From there I'll continue the story in another post.

27 February 2021

The Early Evolution of Fischerandom

Last week's post, 'Presenting the Fischeramdon' (sic; see the last link in the list below), was the first post in nearly two-and-a-half years to shed new light on the early evolution of chess960. I started to wonder: How many other posts had I done on the early years of chess960? To answer that question, I first turned to a post from 2013 that listed earlier posts focusing on Fischer's activities. For easy reference, that 2013 post is pictured below.


2013-03-09: Remembering Bobby

Using the same format, here are posts about Fischer's activities during the 1990s:-

From this we see that Fischer's early activities were bunched into two time periods. The first period took place in 1992-1993, when Fischer developed the rules of his emerging invention. The second period took place in 1995-1996, when Fischer revealed his invention to the world.

What happened in 1994 and after 1996? Looking at Fischer's other activities in those periods might help answer those questions.

20 February 2021

Presenting the Fischeramdon

Spotted on Twitter: Las revelaciones de Miguel Ángel Quinteros, el ajedrecista argentino que convivió 25 años con Bobby Fischer (infobae.com). Google translates the headline as 'The revelations of Miguel Ángel Quinteros, the Argentine chess player who lived with Bobby Fischer for 25 years'. What sort of 'revelations' are we talking about?
It was Quinteros who assisted him in 1971 to beat Petrosian; in 1972 he was in preparation and then assisted him in the World [Championship] in Iceland. He was also the one who accompanied him to most of the Open, to Las Vegas and three months to Taxco (Mexico) in 1982; to Paris in 1995 to draw up the Fischerandom contract that was launched with singular success on 16 June 1996 at the Pasaje Dardo Rocha in La Plata at the request of the then governor Eduardo Duhalde.

I don't understand the references to the Open, Las Vegas and Taxco, so I'll leave that to the Fischer experts. I do understand the reference to June 1996, which I discussed years ago in Fischer Announces Fischerandom (October 2009). I don't understand the reference to Paris 1995, but I'll leave that for another time.

Even more important to the history of Fischer's invention, the article included a photo. It's reproduced below along with its translated caption.


'Fischer with Quinteros in La Plata, in 1996. He had come to present the Fischeramdon [sic], a chess variant where the pieces (except the pawns) could be placed in the opening in a random way to demand the creativity of the players.'

GM Quinteros has appeared briefly on this blog before, the last time in the post Fischer and 'Wild Variant 22' (December 2013). That post is currently no.1 on 'Popular Posts (All time)' at the bottom of every page on this blog and often appears at the top of every page in 'Popular Posts (Last 7 Days)'. At some time in the past I discovered that it was not for its relevance to chess960, but rather for its discussion of the Fischer - Short ICC controversy in the early 2000s.

I never realized that GM Quinteros played a role in the early history of chess960/FRC. Perhaps that knowledge will lead to further historical discoveries.

***

Later: Re '[Quinteros] was also the one who accompanied [Fischer; ...] to Paris in 1995 to draw up the Fischerandom contract that was launched with singular success on 16 June 1996', I wrote, 'I don't understand the reference to Paris 1995'. I found three references in previous posts:-

  • Brady on Fischer Random (January 2011) • 'While in Budapest, Fischer also made the acquaintance of Andrei [Andor, Andre] Lilienthal, who arranged a meeting with FIDE President Kirsan Ilyumzhinov. [...] It's not clear from Brady's account when this meeting took place, but the February 1996 issue of Europe Echecs (p.22) gives a date of 15 December 1995.'

  • An Aborted Announcement (February 2012) • 'From The Week in Chess 51, 1 October 1995: "Bobby Fischer to present new chess rules' By Roberto Alvarez"'; I asked, 'What happened to that 1995 announcement? [...] Whatever finally became of the November 1995 plans'

  • Foraging the 'News Groups' (August 2013) • '1996-04-14: Bobby Fischer Announces New Rules of Chess [rgc]; April 1996 was after the first (tentative) formal mention by Fischer in November 1995, as I recorded in An Aborted Announcement, and the formal announcement in June 1996, Fischer Announces Fischerandom.'

I imagine that 'Paris in 1995' meant the meeting with Ilyumzhinov in December 1995. Fischer had one objective for the meeting: Fischerandom; Ilyumzhinov had another: getting Fischer to return to chess.

30 January 2021

Wesley So's Tactics

After with last week's post, So Explains So vs. Carlsen (January 2021), I continued with Chessable's free course 'Short & Sweet: Fischer Random Chess' by GM Wesley So. The third of the three chapters is titled 'Intro to Tactics'. It consists of a 17 minute video and 22 exercises, of which nine are covered in the video.

I watched the video and worked through the exercises. The top half of the image below shows the first position explained in the video. It is undeniably a chess960 position and illustrates a tactic that is not likely to arise in any opening from SP518 RNBQKBNR.

The bottom half of the image shows my score from the exercises. I aced the nine positions repeated from the video and had trouble with three of the new positions. In a couple of those positions, I wasn't sure why my move was inferior to the 'right' move, but using the 'Analysis Board', managed to see where I had gone wrong. In my original post about the Chessable courses, Wesley So's Strategies (December 2020), I said about the longer course,

The Chessable price for the recent 'Wesley So's Fischer Random Strategies and Tactics' is more than I care to pay for a resource of unknown quality.

I'm still not convinced that the price is right, but the quality is definitely there. GM So has discovered and shared many of chess960's secrets.