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Member since Mar-29-07 · Last seen Dec-07-22
34yo Dutch male chess player with a KNSB rating of <1820> (per June 2022).

Nickname disclaimer: I've occasionally seen people abbreviate my nickname to Thea, but it's not from 'Thea N', it's from 'The aN', 'An' being an otherwise useless abbreviation to my first name. I go by a different nick nowadays, just use TheaN in full or call me Arno :>.

Where you find me here: I am almost always occupied on the daily puzzle, at least during the weekdays. Weekends tend to be above my level, though I occasionally get full weeks done.

Other interests are biology (sciences, teaching), gaming (WoW, DOOM, GTA, among others) and the occasional binge watch (few animes and RL shows like Stranger Things, assorti of stuff really).

[Update: TheaN in jun-2022]
[Disclaimer: for sake of privacy I've edited my profile a bit.]

   TheaN has kibitzed 3374 times to chessgames   [more...]
   Dec-07-22 Portisch vs Bobotsov, 1972 (replies)
TheaN: <24.Rxe7 with 25.Bd5 +-> is just not hard to spot, and even though Black can prevent material loss on the short term, the position's in shambles. Okay Wednesday, but on the easy side.
   Dec-06-22 F Bohatirchuk vs N Kopaev, 1938
TheaN: <25.Qxg7+> is apparently not the fastest way to mate (surprisingly), but I know it gets the job done unopposed. <25....Kxg7 26.Nxe6+ Kg6 (Kg8 27.Ne7#; Kh6 27.Bh6+ Kg6 28.Ne7#) 27.Ne7+ Kh6 28.Bg7#>.
   Dec-05-22 A Kubbel vs Ragozin, 1929 (replies)
TheaN: <25.Rxf5 Qxf5 26.Qxe7 +-> seems the most straightforward, threatening Qg7+ and 26....Nxd5? shows this in full: 27.Qg7+ Kh5 28.Rg5+ Kh4 (Rxg5 29.Qxg5#) 29.Qh6#. A lot of wins for White but not a typical Monday.
   Nov-30-22 R Bellin vs J Penrose, 1974 (replies)
TheaN: <32.Rxg5+> 32....fxg5 33.Rg6+ Kh8 34.Qf7! #6 kind of plays itself except for the final move. Black can only prevent mate by throwing all major pieces... and still get mated. There are alternatives on move 32 (at least prevent a fast mate), but it's still ill fated as Rxg5+ takes
   Nov-29-22 H Lehmann vs P Mueller-Breil, 1952 (replies)
TheaN: After <20.Rxd5> Black's absolute toast as 20....Qxa4 21.Re1+ Be3 22.Rxe3+ Qe4 23.Rxe4#. Bxf2+ intermezzo doesn't help, as the queen's pinned so White can take with either piece. Defending the queen with Rd8 will lead to mate in 2 after Re1+, and castling to either side loses ...
   Nov-28-22 H Lehmann vs S Tatai, 1968 (replies)
TheaN: Late nighter but this one speaks for itself: Black has two double checks to choose from (and plenty of regular discovered checks but they don't do much). <49....Rc2+> is mate in three, after <50.Kxc2 (Kb3 Qc3#) Qc3+ 51.Kd1 Qd2#>. Surprisingly, the alternative is a draw ...
   Nov-24-22 Lutikov vs Gurgenidze, 1957 (replies)
TheaN: A solve, though I didn't consider what could be called the main line: after <45....Qxb2!> Black simply leaves the four queens on the board, telling White, "I'm not afraid of this". Rightfully so, because Black threatens R/Qa3#, and the long diagonal is safe. Some examples: ...
   Nov-23-22 Rublevsky vs Kalinin, 2002 (replies)
TheaN: For once, I saw this start to finish. And it's not that easy, but a good Wednesday because of that. <25.Rxf7> forces most in the Black camp. Perhaps the most striking line is 25....Rxf7 26.Qxf7+ Kh8 which doesn't seem to lose anything at first glance, 27.Rh3! #4. Similarly, ...
   Nov-22-22 E Agrest vs Vitiugov, 2006 (replies)
TheaN: Actually followed the game line for once. <18....Nb4> just seems the most logical, given 19.Nxb4 Nc3+ -+ is hopeless for White, thus <19.Qd1 Nxd3 20.exd3> 20.Qd3 Nc3+ still. And here I thought <20....Nc3+?! -+<>> would win quite swiftly, it does but is not as ...
   Nov-21-22 Hromadka vs J Dobias, 1943 (replies)
TheaN: <Mayankk: Black decided to die a quick tactical death by 39 ... Qa6. Instead 39 ... Qxg1 40 Kxg1 Kxe6 41 Nf4+ Ke5 42 Nxh5 would have led to a slow end-game death with the connected passed pawns on g and h files.> Hm, interesting. I think the better line there would be ...
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