agb2002 Member since Jun-28-08 · Last seen May-24-13 I'm an applied mathematician who lives in the south east of Spain. I'm not rated. My favorite players are those considered the best endgame artists of all time: Lasker, Rubinstein, Capablanca, Smyslov and Fischer. I also tend to prefer the strategists (Botvinnik, Karpov, Kramnik) and the universal style players (Spassky, Anand) to the tacticians. However, I like accurate chess regardless of the players and styles. My approach to the puzzles is similar to that of David Zechiel (User: dzechiel): I first write the variations I find in a reasonable amount of time (using the puzzle diagram only) and post them before watching the game or other's comments. Then I have a look at them and try to be critical with my work. I apply the touch-move rule to my posts (see Unzicker vs Fischer, 1960). I hope to improve my tactical vision this way. Often I cannot even spend a couple of minutes looking at the diagram (work, family, other interests, etc.) so I try to blind solve it along several breaks. My first attempt was R Vera vs S Garcia-Martinez, 2001 and although the variations I found were not very deep I felt quite satisfied with the experience. I became interested in puzzle Elo ratings after trying to find a way of measuring my progress with these exercises. However, computing just rough estimates of the Elo rating of a given puzzle is a difficult problem. Some strategies to accomplish this are: I. Machine estimates. This method is pursued by User: MostlyAverageJoe so you should refer to his forum for further details. II. FIDE Elo distribution. This method assumes that the following more or less reasonable assumptions hold: 1) The puzzle kibitzer Elo distribution is close enough to that of FIDE rated players. 2) A player with Elo x is a good representative of the players belonging to the Elo interval [x-25, x+24]. 3) Kibitzers are objective and only claim the point when they really worked out the complete solution. I have approximated the FIDE Elo distribution with this table (source http://www.fide.com, Dec 31 2008): __A_ | __B_ | __C_ | __D__ | __E__ | ___F___ 1325 | 1300 | 1349 | 99209 | ____0 | 100.0000 1375 | 1350 | 1399 | 99209 | ____0 | 100.0000 1425 | 1400 | 1449 | 99209 | __185 | 100.0000 1475 | 1450 | 1499 | 99024 | __373 | _99.8135 1525 | 1500 | 1549 | 98651 | __558 | _99.4376 1575 | 1550 | 1599 | 98093 | __850 | _98.8751 1625 | 1600 | 1649 | 97243 | _1286 | _98.0183 1675 | 1650 | 1699 | 95957 | _1851 | _96.7221 1725 | 1700 | 1749 | 94106 | _2594 | _94.8563 1775 | 1750 | 1799 | 91512 | _3511 | _92.2416 1825 | 1800 | 1849 | 88001 | _4677 | _88.7026 1875 | 1850 | 1899 | 83324 | _5879 | _83.9883 1925 | 1900 | 1949 | 77445 | _7053 | _78.0625 1975 | 1950 | 1999 | 70392 | _8236 | _70.9532 2025 | 2000 | 2049 | 62156 | 10602 | _62.6516 2075 | 2050 | 2099 | 51554 | 11189 | _51.9650 2125 | 2100 | 2149 | 40365 | 10541 | _40.6868 2175 | 2150 | 2199 | 29824 | _8745 | _30.0618 2225 | 2200 | 2249 | 21079 | _7531 | _21.2471 2275 | 2250 | 2299 | 13548 | _5311 | _13.6560 2325 | 2300 | 2349 | _8237 | _3358 | __8.3027 2375 | 2350 | 2399 | _4879 | _1993 | __4.9179 2425 | 2400 | 2449 | _2886 | _1367 | __2.9090 2475 | 2450 | 2499 | _1519 | __643 | __1.5311 2525 | 2500 | 2549 | __876 | __451 | __0.8830 2575 | 2550 | 2599 | __425 | __238 | __0.4284 2625 | 2600 | 2649 | __187 | __109 | __0.1885 2675 | 2650 | 2699 | ___78 | ___46 | __0.0786 2725 | 2700 | 2749 | ___32 | ___20 | __0.0323 2775 | 2750 | 2799 | ___12 | ___11 | __0.0121 2825 | 2800 | 2849 | ____1 | ____1 | __0.0010 2875 | 2850 | 2899 | ____0 | ____0 | __0.0000 where column A is the Elo representative of the class of players determined by columns B and C, column D is the amount of players stronger or equal, column E is the amount of players in the corresponding class and column F is the percentage of players stronger or equal. Now, if, for example, 70% of us solved completely the puzzle, I would rate it at Elo 1975 or better, between 1950 and 1999 points. Unfortunately, not all of us publish (an excerpt of) our findings to 'prove' that we got the solution (or a terrible embarrassment...). This translates into many computational problems: from strong bias (as pointed out by John Spouge, see agb2002 chessforum) to such lack of resolution that assessing the more difficult puzzles becomes impossible (see agb2002 chessforum). III. Puzzle characteristics. There are some features in every puzzle that can be used as metrics to evaluate its difficulty, for example, the type and number of tactical motifs, the number and depth of variations, the type and amount of material still on board, etc. For example, many players will solve the following puzzle immediately (White to move, Lasker's Manual of Chess, p. 116): click for larger view However, the next puzzle is considerably more difficult in spite of containing practically the same tactical motifs (White to move, Lasker's Manual of Chess, p. 119): click for larger view Once having collected a sufficient number of puzzles with their metrics and Elo evaluation (perhaps using method I) it might be possible to fit a several variable function in which the independent variables are the metrics and the dependent variable is the given Elo rating. IV. Post characteristics. We can try to use some metrics from the posts to estimate its rating. These metrics would include: 1. CG assigned stars. 2. Posts issued on the puzzle's day. 3. Posts recognizing failure. 4. Plies to reach a clear decision, draw included. 5. MostlyAverageJoe's rating (thanks MAJ!). 6. Posts claiming (or implying) it was (too) easy. 7. Posts complaining (or implying) it was (too) difficult. Once having collected enough data (from at least 30 puzzles) we would try to find the most suitable fitting model f: rating = f(x1, ..., x7) xi being the above variables, not necessarily all included in the model. For example, it could be as simple as rating = 1200 + 100*plies As a curiosity, this is a VBA function for the best fitting model I've found to date using the CG stars (cgs) as the only predictor variable (N = 181, Rē = 0.688, asymptotic standard errors five times -at least- smaller that the corresponding coefficients): Function MAJ_Rating(ByVal cgs As Double) As Double Const a As Double = 861.15488885 Const b As Double = -0.555156265 Const c As Double = 0.156127404 Const d As Double = -0.015186844 MAJ_Rating = a / (1 + cgs * (b + cgs * (c + cgs * d))) End Function Comments are welcome.

agb2002 has kibitzed 2355 times to chessgames   [less...]

May-24-13 Kasimdzhanov vs Morozevich, 2013    agb2002: I predict a Moro victory in a six-piece endgame.      May-24-13 Mieses vs Albin, 1903    agb2002: White has a knight for a bishop. Black threatens 25... Rxc7 and 25... Qd3+, trading queens. The first idea that comes to mind is 25.Qe6+, looking for a forced mate: A) 25... Kxc7 26.Rb7+ Kd8 27.Nc6+ Rxc6 (27... Nxc6 28.Q(R)d7#) 28.Rb8+ Kc7 (28... Rc8 29.Rxc8#) 29.Qc8#. B) 25... Kd8      May-23-13 Karpov vs Csom, 1977    agb2002: White is one knight and one pawn down. Black threatens 50... Nxd7 and 50... Nh4 followed by 51... Qg2#. The white knight is in the way of the queen to h2. This suggests 50.Nf5, creting a mate threat on g7 with the queen and both the knight and rook: A) 50... Nxd7 51.Qh2+ Kg8 (51...      May-22-13 I Berezovsky vs V Rusel, 1984    agb2002: The material is identical. Black threatens 11... fxg5 and 11... Bxh6. A royal fork on f7 would be possible if the rook on f8 disappeared. Therefore, 11.Qf7: A) 11... Rxf7 12.Nxf7+ Kg8 13.Nxd8 A.1) 13... Bxh6 14.Nxb7 Na6 15.Na5 + - [R+P vs B] . A.2) 13... b6 14.Bxg7 Kxg7 15.e3 ...      May-21-13 Korchnoi vs I Krush, 2007    agb2002: The material is identical. White threatens 28.Bd3 and 29.Bc4 (28... Rxd3 29.Qf8#). The first idea that comes to mind is 27... Rxd2 to win two pieces for a rook. However, this loses miserably to 28.Qf8#. A change in the move order yields 27... Qxe4: A) 28.Nxe4 Rd1+ 29.Rf1 Rxf1#. ...      May-20-13 F J Moyano Morales vs C Merlo, 1967    agb2002: White is one knight down. Black threatens 20... Rxd2. Pattern recognition quickly finds a mate in two: 20.Qg5+ Rxg5 21.Rxg5#.      May-19-13 Yifan Hou vs Lahno, 2012    agb2002: White has the bishop pair for a bishop and a knight. Black threatens 38... Qxc1, 38... Qxa4 and 38... Qh5+ trading queens. The moves I would initially consider are 38.gxf6+, 38.g6 and 38.Qxg7. In the case of 38.gxf6+ gxf6 (38... Kxf6 39.Qh4+ g5 40.Qxg5#) 39.Bh6 Qh5+ 40.Kg3 Nb8 ...      May-18-13 Staunton vs Von Der Lasa, 1853   agb2002: <Abdel Irada: <agb2002: Black is one pawn.> I thought this site was about chess, not Zen philosophy. ∞> Then, what's the meaning of the infinity symbol you add at the end of your posts? I'm intrigued...      May-17-13 Fischer vs W Beach, 1963    agb2002: White is one pawn down. Black threatens 21... dxe4 and is about to castle (assuming it still is legal). The black bishop protects the knight, which covers the defenseless rook on b8. This suggests 21.Bh6: A) 21... Bxh6 22.Qxe5 A.1) 22... O-O 23.Nf6+ Kf7 24.Nd7 wins the exchange ...      May-16-13 D Edelman vs J Curdo, 1983    agb2002: Black has the bishop pair for a bishop and a knight. White seems to try to simplify the game by removing the bishop on b6. The white bishop is momentarily pinned. This suggests 18... Nxf3+ (18... Rxe3 19.Nxb6) 19.gxf3 Qg5+: A) 20.Kf2 Rxf3+ 21.Kxf3 (21.Ke2 Rexe3+ 22.Qxe3 Qxe3#) 21...      May-15-13 N Aggelis vs A Heimann, 2012     May-14-13 Anand vs Karjakin, 2013     May-14-13 T Hickendorff vs R Van Bokhorst, 2005     May-13-13 Chigorin vs Davydow, 1874     May-12-13 Pillsbury vs Lasker, 1904     May-11-13 J Cori vs N Huschenbeth, 2012     May-10-13 Aronian vs Karjakin, 2013     May-10-13 Gunsberg vs Von Gottschall, 1887     May-09-13 V Vepkhvishvili vs D Gedevanishvili, 1983     May-08-13 Hertneck vs A Ferreira, 1983     May-07-13 J Negro vs Manuelli, 1983     May-06-13 Z Belic vs S Inhoven, 1987     May-05-13 V Buenermann vs K Mokry, 1998     May-04-13 N Vitiugov vs Ding Liren, 2012     May-03-13 Kasparov vs P Nikolic, 1992     May-02-13 Pospisil vs Keller, 1984     May-01-13 V Tukmakov vs Schussler, 1983     Apr-30-13 V Vepkhvishvili vs K Shavgulidze, 1983     Apr-29-13 H P Garcia vs P Gelpke, 1983     Apr-28-13 Caruana vs Topalov, 2013     Apr-28-13 Adams vs Fedorov, 2001     Apr-27-13 Lenderman vs S Zierk, 2012     Apr-26-13 Janowski vs Lasker, 1909     Apr-25-13 A Sokolov vs H Frauensohn, 1992     Apr-24-13 S Atalik vs B Baum, 1998     Apr-23-13 B Ivanovic vs K Osmanovic, 1983     Apr-22-13 F Olafsson vs Pilnik, 1957     Apr-21-13 M Esserman vs P Nutzman, 2009     Apr-20-13 Shredder vs Gull, 2013     Apr-19-13 Nakamura vs R Hess, 2012     Apr-18-13 C Thomson vs A Magalotti, 1988     Apr-17-13 P Hoffmann vs R Aschenbrenner, 2009     Apr-16-13 T Chua vs P Aizpurua, 2010     Apr-15-13 V Ouwendijk vs Y Gorter, 2005     Apr-14-13 Kasparov vs Tal, 1987     Apr-13-13 Kasparov vs Ivanchuk, 1994     Apr-12-13 Adams vs Kasparov, 2005     Apr-11-13 Kasparov vs Seirawan, 1996     Apr-10-13 Kasparov vs Yurtaev, 1981     Apr-09-13 Kasparov vs Mephisto, 1985     Apr-08-13 Topalov vs Kasparov, 1998     Apr-07-13 Zhao Jun vs Zhou Jianchao, 2012     Apr-06-13 V Tukmakov vs E Magerramov, 1983     Apr-05-13 Lombardy vs Fischer, 1958     Apr-04-13 Xiu Deshun vs J 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Cmilyte, 2011     Aug-14-12 Kupreichik vs Razuvaev, 1980     Aug-13-12 S Pencil vs G Goltsoff, 1976     Aug-12-12 Polugaevsky vs Smyslov, 1979     Aug-11-12 Lutikov vs L Aronson, 1957     Aug-10-12 Keres vs V Petrov, 1940     Aug-09-12 C Maier vs Kasimdzhanov, 2011     Aug-08-12 Emms vs P Wells, 1989     Aug-07-12 F Ghaledar vs J Arun, 2011     Aug-06-12 F Rhine vs S Nagle, 1997    Aug-06-12 C Ward vs A Summerscale, 1996     Aug-05-12 E MacDonald vs Burn, 1910     Aug-03-12 K Akshayraj vs S Safin, 2005     Aug-02-12 Judit Polgar vs N Gaprindashvili, 1990     Aug-01-12 DeFirmian vs A Rustemov, 1999     Jul-31-12 Simagin vs Kholmov, 1966     Jul-30-12 L Ootes vs K Yamada, 2011     Jul-29-12 H Asauskas vs V Malisauskas, 2004     Jul-27-12 Geller vs Dorfman, 1976     Jul-26-12 E Hermansson vs S Cicak, 2006     Jul-25-12 Sanahuja vs Fernandez, 1983     Jul-24-12 Short vs A Muir, 2004     Jul-23-12 E Sigurdarson vs H Ragnarsson, 2011     Jul-22-12 Once chessforum     Jul-22-12 K Rodriguez vs 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Sherwin, 1957     Jun-23-12 D Khamrakulov vs S Abu Sufian, 2010     Jun-22-12 Romanishin vs Marjanovic, 1972     Jun-21-12 P Moran vs E Franco, 1955     Jun-20-12 Tal vs R Mascarinas, 1981     Jun-18-12 Ulf Andersson vs Hartston, 1972     Jun-16-12 Fischer vs Taimanov, 1971     Jun-15-12 LoveThatJoker chessforum     Jun-15-12 M Piskur vs B Klein, 2012     Jun-14-12 Tal vs Y Rantanen, 1979     Jun-13-12 Sutovsky vs Smirin, 2002     Jun-12-12 D Tomic vs F Winzbeck, 1993     Jun-11-12 R Ashley vs R Morton, 1980     Jun-10-12 E Terpugov vs Petrosian, 1957     Jun-08-12 M Beinoras vs H Salo, 2009     Jun-08-12 Taimanov vs A Shashin, 1978     Jun-06-12 E Paehtz vs M Seps, 2004     Jun-05-12 M Pestalozzi vs D Duhm, 1900     Jun-04-12 S Sery vs Z Vecsey, 1921     Jun-03-12 Seidman vs Santasiere, 1939     Jun-03-12 S Agdestein vs Nunn, 1985     Jun-01-12 B Vladimirov vs Doda, 1967     May-31-12 Leko vs Anand, 2001     May-30-12 Kasparov vs Bacrot, 2000     May-29-12 G Burgess vs W Watson, 1989     May-28-12 V Greenwalt vs B Wall, 1983     May-27-12 Khalifman vs Ermenkov, 1994     May-26-12 J Barle vs I Jelen, 1979     May-25-12 A Ivanov vs A Vitolinsh, 1979     May-24-12 Zukertort vs Englisch, 1883     May-23-12 J Nogueiras vs M Gongora, 2001     May-22-12 F Kraus vs V Costin, 1913     May-21-12 J Benjamin vs N Gamboa, 1995     May-20-12 Tarjan vs Ljubojevic, 1969     May-19-12 Bronstein vs Korchnoi, 1962     May-18-12 Barbero vs U Rueetschi, 1987     May-17-12 Alekhine vs Opocensky, 1943     May-16-12 C T Goering vs E Schallopp, 1877     May-15-12 Polugaevsky vs J Eising, 1974     May-14-12 Anand vs Vallejo-Pons, 2004     May-11-12 Anand vs Gelfand, 2012     May-05-12 Gelfand vs Ivanchuk, 1989     May-04-12 Gelfand vs Salov, 1996     May-03-12 Lautier vs Gelfand, 1999     May-02-12 Karjakin vs Anand, 2006     May-02-12 M Gurevich vs Gelfand, 2002     May-01-12 Gelfand vs Ulibin, 1985    May-01-12 Gavrikov vs Gelfand, 1995     Apr-28-12 Anand vs Dreev, 1991     Apr-27-12 Anand vs Van Wely, 2004     Apr-26-12 Anand vs P H Nielsen, 2003     Apr-25-12 Tal vs Benko, 1964     Apr-25-12 Capablanca vs S Cohen, 1924     Apr-24-12 D Khismatullin vs Zhou Jianchao, 2012     Apr-23-12 Wemmers vs Metger, 1877     Apr-22-12 Van Wely vs Acs, 2002     Apr-21-12 A Ozsvath vs K Honfi, 1953     Apr-20-12 Larsen vs A Matanovic, 1965     Apr-19-12 Korchnoi vs Yusupov, 1981     Apr-18-12 G Henriksen vs H Runde, 2005     Apr-17-12 agb2002 chessforum     Apr-17-12 F N Stephenson vs J Penrose, 1968     Apr-16-12 T Dowden vs W Petch, 1982     Apr-15-12 Huebner vs A S Segal, 1969     Apr-14-12 johnlspouge chessforum     Apr-14-12 Kaplan vs Bronstein, 1975     Apr-13-12 Duras vs E Cohn, 1911     Apr-12-12 Mikhalchishin vs Shirov, 1988

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Calculo, luego existo

< Earlier Kibitzing  · PAGE 7 OF 7 ·  Later Kibitzing> Mar-28-11    Patriot: <agb2002> <Have you considered a different approach instead of Candidate Moves (CM)? Valeri Beim in his 'How to Calculate Chess Tactics' calls it Logical Analysis and I prefer it over CM because the former is less mechanical and promotes a deeper understanding of the position. I suspect it was also Capablanca's method because it would explain facts like being able to crush masters at blitz even giving them odds of 1-5 minutes.> That is very interesting. I will likely ask my instructor for his opinion. I also wonder if this is a good approach for my level. When I was rated around 1300 it certainly wouldn't have helped because I had to be missing a lot of basic tactics to be at that level. Silman's books helped to a point but studying "Silman's thinking technique" was not the best approach. What good is knowing positional concepts if you don't see tactics? My instructor has suggested that I get Silman's newest revised book because I'm now at a level where it would help. Silman's approach may be similar to what you're suggesting and I do plan to get his book. One problem I faced was that I tried to apply Silman's approach in G/30 which turned out to be disastrous because I would spend 10-15 minutes trying to understand or create imbalances! It may have contributed to poor time management that I'm facing now. This is why I am playing a lot of 2 minute games (+5 sec increment). I'm trying to gear myself toward proper pace and develop a better awareness of time. It should help me to become quicker at spotting basic safety issues and develop a better sense of when to play fast (non-critical positions) and when to play slow (critical positions). It seems that "pace" is the most important thing in chess because it determines how one should analyze a position. This kind of practice is probably the single most important thing I can do right now to improve. Mar-31-11    Patriot: <agb2002> <However, my experience is the contrary: it doesn't matter the activity (lifting weights, playing piano, programming computers, devising algorithms, learning foreign languages, etc.) you must master the technique before you can push your skills, including performance speed, to their limits (so you can already face heavier loads, more complex studios, more reliable & quicker software, optimized algorithms, hold a conversation, etc.).> Sorry, I don't understand what you mean by "technique". Do you mean I should learn the technique of "Logical Analysis" before trying to improve my pace, tactical vision, etc.? Thanks! Jul-03-11    johnlspouge: Hola, <Antonio>. Thanks for the suggestion about installing software on my cellphone. Unfortunately, you are talking to a determined Luddite. My ancient cellphone barely remembers how to make phone calls ;>) I appreciate your computer analysis on Bxe2. I find that I am enjoying the POTD again - very civilized and productive - you might find me hanging around more than I thought :) Keep well (and keep doing pushups). Jul-06-11    Patriot: Thanks Antonio for your input! Aug-24-11    morfishine: Your analysis on todays Puzzle (Wednesday 8-24) was excellent, to say the least. I enjoyed every word of it. Thanks, Morf Dec-20-11    CHESSTTCAMPS: <That's why I routinelly include imminent threats in the preliminaries to my solution. It's a simple method to create a habit I can use in real games.> Sorry for the late response - I hadn't been monitoring my forum lately. I had noticed this feature of your posts and have recently made a point of adding this good habit to my write-ups when it is particularly relevant to my thought process. <By the way, the machines we sent to Ohio last year have shown such performance that a large company specializing in industrial plants became interested in producing them for the American market. So, it is very likely that I'll become a temporary neighbor of Wisconsin early next year to train their engineers on the calculation (sizing/rating) of these machines.> Congratulations on your success in this endeavor and I hope you enjoy your stay in Wisconsin. I was just writing a Christmas letter to an old professional client who now works in neighboring Minnesota. If you are up there in the winter, I hope the weather is kind to you. Speaking of fine Spanish products, I must tell you that the Clementines we've been receiving from Spain this autumn are perhaps the best citrus fruit I've ever tasted. Dec-26-11    CHESSTTCAMPS: <I also tried to guess the opening from which the position came, to accumulate some knowledge about what tactics one can expect from what openings but I forgot that habit.> Another good idea, which I may pursue at least occasionally. <If you want to impress your friends you should consider three Spanish products:...> All of these suggestions sound wonderful, but I'm keeping to a fairly tight budget right now. Boxes of about 20 clementines sometimes sell for as low as $3.99 at Giant food stores, a terrific bargain. Later in the season, when the quality is not so good, the price sometimes rises to $10 or more - go figure. I hope that you and your family enjoyed a wonderful Christmas. Jan-01-12    CHESSTTCAMPS: <Yes, we experience similar price increases here. ...> I take note of your point about Morroccan fruit being held to lower standards. Giant Foods has carried both Spanish and Morroccan clementines in recent years, the latter usually starting in January and later. Usually, both are delicious. I think that Giant is a reputable outfit and they would take care that their label means what it says. In any case, if there are serious doubts about the source, I think that consumer watchdogs would raise the issue loudly and clearly. <Similarly, avoid some Italian "products",....> This is interesting, something I was not aware of. I am a regular consumer of olive oil. <Thank you, I wish you the same for you and your family and a good New Year.> Thanks, Happy New Year to you, too. Feb-03-12    Patriot: <agb2002> <Hello Patriot, how is the new year treating you? Hope everything is ok with you and your family.> My apologies for not responding to you sooner! I really thought I had responded back and just noticed I haven't! Everything is going well with me and my family. I appreciate you asking and I hope all is well with you! Keep up the amazing work on the puzzles! Take care. Apr-10-12    johnlspouge: Hola, <Antonio>. Thanks for "dropping by". I hope you and your family are well. I looked at the reviews of Penrose's "The Road to Reality", which I have not read, and I am daunted. Do I want to spend the time and effort required to understand the book? I therefore turn your question back to you: what did you think of the book? Be judicious in your answer, please ;>) All the best, John Apr-12-12    johnlspouge: Hi, Antonio. Your review link http://www.ams.org/notices/200606/r... was good enough. The book is a must-read. I will let you know how it goes. Thanks for thinking of me :) All the best, John Apr-15-12    quantum.conscious: hi <antonio> , thanks for your posts about roger penrose books. i found them very interesting. Apr-17-12    agb2002: <quantum.conscious: hi <antonio> , thanks for your posts about roger penrose books. i found them very interesting.> Thank you! It seems that the interest on Penrose's Road is skyrocketing: I can count three now which means a tremendous increase of 50%! ;-) May-11-12    ketchuplover: Go Boris!!!!!!! Jun-11-12    LoveThatJoker: <agb2002> Hi! I'm sending you this note to firstly thank you for your kind and objective acknowledgment on M Beinoras vs H Salo, 2009. I made sure to post my original thank you there! I had a fellow CG full member, <AlienMath> post a question on High-Mathematics on my forum that I cannot assist on elucidating on, due to the fact that I am not a trained Mathematician. The question is located directly on this link LoveThatJoker chessforum. Any help on the elucidation of the concepts of both the Goldberg conjecture and the Riemann hypothesis would be genuinely appreciated. Thank you! LTJ Jun-12-12    LoveThatJoker: <agb2002> Thank you for the kind reply on my forum! LTJ Jun-14-12    LoveThatJoker: <agb2002> Do you have any idea who this is? Look at Book 3 here http://chessbase.com/newsdetail.asp.... I will give you anyone you want in exchange for this one. LTJ Jun-15-12    LoveThatJoker: <agb2002> Thank you for getting back to me on that! LTJ Jul-22-12    Patriot: Hi <agb2002>! <I agree. I still have to rethink my move selection algorithm.> Usually you latch right on to the correct move. Do you consider other candidates or do you usually only post the principle candidate after analysis? For example in today's puzzle, I thought 22.Bh6 was a good candidate and 22.Nb5 was interesting, although I didn't post anything about it initially. 22.Rxf6 was the first move I saw but I didn't see the Kh1, Rg1 idea and thought it was unnecessarily complicated. By the way, good job on the POTD! Oct-01-12    morfishine: Hello <abg2002>! Nice write-up in the Sunday POTD! I only noticed <25...Bxe4> immediately after posting 25.Rxb4 <25...axb4>. I briefly considered deleting my post then adding this as a possible improvement but decided to leave these separate. I'm a bit surprised there wasn't more discussion on <25...Bxe4> Nov-14-12    Patriot: Hi <agb2002>! Good job on your win! I read your comment about losing the exchange before going over your game so when you played 20.Rae1 I figured the rook on f1 was going to be *the* piece. I've lost the exchange quite a few times like this so I'm very suspicious about moves that trap the rook. I had a question about 11.Nxe7+. What prompted you to play this? That knight is a real thorn thanks to 9...b6?. I wouldn't recommend trading it until forced to do so since the bishop isn't going anywhere. That's similar to what Dan told me once when I captured a pinned piece. He said "You should almost never capture unless they threaten to break the pin or capture the pinning piece, for example." By not capturing, you have time to build your position further while he is left dealing with the situation. It really looks like you did have a bad day though--we all have them! I just thought I'd mention the knight capture though because that move really stood out with me. But it's probably something you wouldn't have done on any other day! Thanks for sharing! Nov-25-12    ShahMaat: ...no comment.New guy on the block.I enjoy the dialogue between the users.I thank you all,and look forward to crossing swords with you!Unrated old fart. Jan-18-13    Patriot: Hi <agb2002>! I loaded your game into Fritz and followed it. You played a nice game against Houdini! On move 35 (white to play), how did you evaluate the position: click for larger view I might think black is a little better, and Houdini agrees after 22-ply. You said 35.Bf1 was better but at 22-ply, it agrees with you! <35.Ba6> Jan-19-13    Patriot: Hi <agb2002>! <Perhaps the note below the players showing the engine which performed the analysis misled you.> Yes this is exactly what happened--I completely misread that (sorry). Your plan, having the outside passed pawn, is a good one. Nice game! Mar-03-13    Jimfromprovidence: Thanks for the constructive feedback concerning Saturday's puzzle. Jim Jump to page #    (enter # from 1 to 7) < Earlier Kibitzing  · PAGE 7 OF 7 ·  Later Kibitzing>		Advertise on Chessgames.com

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