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Member since May-25-15 · Last seen Oct-08-20
Hello from Australia!

I'm currently a university student and recreational chess player. I played a bit of chess since I was young, and a bit more throughout high school, but never really found the time to seriously study the game.

I don't have an official FIDE or local rating, but would really like to find the time to take part in an OTB tournament to get one! On online chess, I mostly play on FICS, and sometimes on I also used to play correspondence chess on Gameknot, but have stopped for the time being.

I enjoy following high-level chess tournaments throughout the year (even though the timezone difference can make it a tad hard), and this is one of the main reasons why I use I also enjoy doing the daily tactics puzzles on the site.

My other hobbies include recreational maths, trivia, Tetris, the Touhou series of games, and helping out high-school students with maths/science questions. I used to follow road cycling a bit more, as well as the national sport in Australia (AFL).

   roentgenium has kibitzed 48 times to chessgames   [more...]
   Sep-14-19 Louis Stumpers (replies)
roentgenium: Thanks very much for taking the time to go through my post, <Tiggler>. I did some brief searching on Google, and it seems like the correct answer to the problem is in fact 1/3, with the reasoning being exactly that which you used in your first post (kibitz 9565)! So I ...
   Sep-08-19 Russian Championship Superfinal (Women) (2019)
roentgenium: I'm afraid I must respectfully disagree with you here, <AylerKupp>. Whilst I personally have no problem with using the Sonneborn-Berger score as a tiebreaker method, I feel your arguments carry their weight in a Swiss-style tournament, as opposed to a round-robin ...
   Apr-01-18 AlphaZero vs Stockfish, 2017 (replies)
roentgenium: Surely a completely appropriate puzzle for the date :) In keeping with the spirit, we should all provide annotations explaining the motivations behind these moves.
   Jan-17-18 E Blomqvist vs E Romanov, 2016 (replies)
roentgenium: I completely missed 25...Bd3! and hence erroneously thought the solution to today's puzzle was 23...Qa6, attempting to hit the trapped Knight and threaten Re2+. But unfortunately, Black's back rank issues arise in this flawed line, as 24.Re1 is an effective parry. Perhaps the ...
   Jan-03-18 Mamedyarov vs Bu Xiangzhi, 2017
roentgenium: If 41.Kf4, then 41...Kh4 42.e5 g3 43.e6 g2 44.e7 g1=Q 45.e8=Q Qf1+, with 46...Qe1+ and 47...Qxe8 to win the game.
   May-01-17 M Wecker vs A Petursson, 2017 (replies)
roentgenium: I think this puzzle is great for a Monday, as it offers several lessons for lower-rated players (such as myself!). When I first looked at the position, it honestly looked fairly 'normal' to me. Where was the danger? I even wondered if it was in fact White to play and win, or if ...
   Oct-04-16 Caruana vs J Houska, 2016 (replies)
roentgenium: I think 45...Rc7 unfortunately puts the Rook on a square where the Knight will eventually fork it, or mate will result. This is due to the tactical followup 46.Nf6+! The possible continuations: 46...Kg6/Kg7 47.Ne8+ wins the Rook; 46...Kh8 47.Rd8+ Kg7 48.Ne8+ wins the Rook (as ...
   Sep-04-16 Baku Olympiad (2016) (replies)
roentgenium: For those who like their tactics, Caruana-Peralta from move 30 is a sight to behold, with more removal of defenders, forks, zwichenzugs, overworked pieces, pins and skewers than you can poke a stick at. These guys are seriously on another level.
   Aug-17-16 Horst Beer vs Grob, 1966 (replies)
roentgenium: Like some of the other kibitzers here, I was able to find 32...Rxf2 and correctly evaluate the two key variations 33.Rxf2 and 33.Rxe5 as wins for Black, but missed the easy win at the last hurdle, failing to see 36...Bc4+! So I guess it's a pass mark, but not full marks for me ...
   Aug-02-16 V Stepovoj vs E Chasovnikova, 1996 (replies)
roentgenium: I was at first wondering why Black did not play 10...e5 , but then I noticed that this would also be a good candidate for an early week tactical puzzle, with 11.Qc3! winning material, for example: 11...exf4 12.Qxg7 Qf6 13.Qxf6 Nxf6 14.Nc7+ with maybe 15.Rc1 to ensure the Knight ...
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