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AW: Khmelnitsky test: Mephisto IIIS Glasgow
Let's continue with the fast version of the Mephisto IIIS Glasgow: without wait states, thus 12Mhz efficient.
The profile is a bit more round, with slight enhancements for some weak points of the slow version: tactics, attack, sacrifice. Opening (playing skills once out of book) and strategy, already strong, keep on progressing. No hope for endgame theory, the slight increase in speed cannot make for the lack of knowledge. The overall KT score is 1441, so let's check with a puny human: Still this much unusual domination as far as strategy is concerned! The player should better wait for the endgame. Tactical domains keep on being on par. An interesting opponent for the human player! |
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AW: Khmelnitsky test: Mephisto IIIS Glasgow
Let's speed up the device, using the Phoenix Revelation (simulated as explained top of the thread); 38Mhz equivalent:
The overall pattern looks different. The strategy is no more the peak strength, the tactical domains now prevail, undoubtly with regards to far better calculations ability. Leveraging calculations, the Glasgow program can now strongly counterattack, and even commit or recognize sacrifice opportunities. Opening to middlegame phase is very strong. The overall KT score is 1541, 100 Elo points stronger than the previous 12Mhz. Compared to a similar strength human: No more any advantage in strategy, the human is slightly stronger at that level. Nevertheless, he will have a hard time until late middlegame! |
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AW: Khmelnitsky test: Mephisto IIIS Glasgow
Hi Tibono,
your Tests are very interesting. Thank You best regards Markus |
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AW: Khmelnitsky test: Mephisto IIIS Glasgow
Now the long awaited cherry on the cake, the Mephisto Phoenix profile, with an overwhelming 480Mhz speed equivalence:
Well, the bad news is strategy is now one weak point amongst few others at similar level (like attack and endgame). Not that surprising, more speed is not more knowledge! For the very same reason, standard engame positions do not progress much. On another hand, tactical capabilities reach a significantly higher level. Still not a great attacker, nevertheless now stronger defender and counterattacker. Defense is commonly strong with other chess computers, a quality the Glasgow program did not highlight until this large acceleration. What about a human opponent? The KT score being 1755, here you are: The endgame knowledge of the human player is overwhelming. The Glasgow must rely on its strong opening and middlegame phase, then expect some tactical opportunity to avoid the endgame, at least get some concrete advantage before entering it. |
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AW: Khmelnitsky test: Mephisto IIIS Glasgow
Of course I cannot leave without a synthesis: all in one graph!
A larger one to better zoom on the skills profiles: There is a striking oddity in this graph, but I think it can be explained: not only the strategic skills did not step forward with the acceleration, as previously observed, but the graph displays a regression! The good strategic guidelines embedded in the Glasgow program weight higher with short thinking time; deeper calculations steer the score away because of tactical connsiderations, that is my opinion. Maybe strategic elements are mainly computed at root level? Another small oddity lies in the calculations, where the fast IIIS performs less then the slow one; but otherwise the calculations scores look to range accordingly to expectations. The fast IIIS must have been on a wrong track with some position, there is of course some alea related to the current score at the time the thinking process is stopped. Opening, middlegame, tactics, threat recognition and sacrifice progress rather evenly and significantly along with speed. As already pointed out, defense skills were stuck without any significant progress, until the large acceleration provided by the Mephisto Phoenix. Counterattack is sort of similar, with unleashed power starting with the Revelation. And the Glasgow program kept brakes on attacking skills, but that is not uncommon with our dear chess computers (a bit passive, lacking any attacking plan and awaiting tactical opportunities). Feel welcome to comment further! I'll be back very soon with additional data to share, but enough for today. MfG, Eric |
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AW: Khmelnitsky test: Mephisto IIIS Glasgow
Hi Eric,
Thank you very much for your detailed analysises. Like your excellent analysis of the Chessmaster Diamond on your website, they provide valuable information about the strength and weaknesses of the engines. I've a question regarding the test setting though: I found a description in German language, how the Khmelnitsky test distinguishes between strategy, tactics, opening, endgame, etc. (For those, who are interested: https://www.freechess.info/ueebersic...ing-guide.html) But where are the human player profiles taken from? Best regards Markus |
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AW: Khmelnitsky test: Mephisto IIIS Glasgow
Hello Eric,
Thank you very much for this very informative test series. Especially the improved defensive capability of the Mephisto Glasgow on the Mephisto Phoenix I could also observe in the context of my competitions! The overall weak endgame performances, even under Mephisto Phoenix also correspond to my expectations and are also present in practice. I also share your assessments, which are based on your test. Really great work Eric! Greetings Egbert Geändert von Egbert (04.02.2023 um 07:50 Uhr) Grund: Ergänzung |
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AW: Khmelnitsky test: Mephisto IIIS Glasgow
Hi Markus, they are extracted from the data of the very same Khmelnitsky's test. The Elo values come from a data sheet in the book, providing two columns per domain (attack, counterattack,...); one column being the % of your score in the domain, the other the corresponding Elo observed per statistics across a number of players. 99% score is achieved by 2500+ players, 3% by 815 or so players. In between, the distribution vary according to each domain. Elo values for intermediate % values (they are provided per 3% step, so 3%, 6%, 9%... up to 96%, 99%) rely on interpolation.
Well, the data sheet can be red the other way around: I am a 1400 Elo player, which score (%) am I supposed to achieve per domain of chess knowledge? An interpolation can be performed between two Elo values in order to get an accurate percentage within the 3% spread. Of course, the computer-player comparison cannot usefully rely on an Elo graph (this would just add a circle to the basic Elo-graph, plotting the player's strength). So the comparison graph is based on %, as well displaying usual, average strengths and weaknesses of the human player. By the way, time ago I used this idea (not mentioned within the book!) to provide a graph displaying how the skills develop along to the Elo, and posted about in the Hiarcs forum. Here is the graph: and my comments: Code:
- skills develop rather evenly from 830 to 900 player (very same shape), with natural ability for calculations and no, to very little, knowledge about opening phase. Of course, standard endgame positions are likely to be unknown. - 1000 player gets some clues at tactics and related stuff (attack, defense, recognizing threats) - 1200 player has developped clues in strategy and standard endgame positions - 1400 player is a better attacker and went on developping knowledge about standard endgame positions - 1600 player developped tactical skills including sacrifice - 1800 player went on with tactics and better endgame knowledge - 2000 player is a better defender and attacker - 2200 player shows evidence of a breakthrough with strategy, plus reinforced endgame mastery - 2400 player is very balanced, with strategy, opening and middlegame as most enhanced areas. Beware the strong defenser and counterattacker! |
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AW: Khmelnitsky test: Mephisto IIIS Glasgow
Now back to my mainstream, the Glasgow program.
Code:
SMhz Ratio/7.2Mhz Log(Ratio) KT Elo 7.2 1.00 0.000000 1374 12 1.67 0.221849 1441 38 5.28 0.722451 1541 480 66.67 1.823909 1755 The curve's closeness to a straight line is obvious. This means the Elo growth follows the usual rule (a constant value gain per doubling in speed) even when reaching sky-high acceleration. I was expecting more of a drop in the curve from the Mephisto Phoenix, it is not so, well done from the Glasgow program! I added a polynomial regression curve to get the displayed formula we will use later on. Geändert von Tibono (04.02.2023 um 09:28 Uhr) Grund: typo |
Folgende 3 Benutzer sagen Danke zu Tibono für den nützlichen Beitrag: | ||
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