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Member since Jan-08-06 · Last seen Jun-07-23
I mainly compose chess problems these days. Please visit to see a selection of my compositions.

This problem first appeared in The Problemist Supplement, July 2009.

Mark Thornton (after Tibor Orban). Dedicated to Etienne Dupuis, author of Euclide, a program for solving and composing proof games.

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Position after White's 7th move. How did the game go?

It is based on this famous problem by Tibor Orban, Die Schwalbe, 1976 (Commended)

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Position after Black's 4th move. How did the game go?

Solution to Orban's Problem: 1. e4 e6 2. Bb5 Ke7! 3. Bxd7 c6 4. Be8 Kxe8

Solution to my problem: 1. Nh3 d5 2. Nf4 Bg4 3. Nxd5 Bxe2 4. Nxe7 Bb5! 5. Bxb5+ Kxe7 6. Be8 Kxe8 7. O-O

White's 7th move rules out the following possibilities: 1. Nh3 d5 2. Nf4 Bg4 3. Nxd5 Bxe2 4. Nxe7 <Bxf1> 5. Kxf1/Rxf1 Kxe7/Bxe7/Nxe7 6. Ke1/Rh1 Ke8/Bf8/Ng8

>> Click here to see MarkThornton's game collections.

   MarkThornton has kibitzed 2608 times to chessgames   [more...]
   Apr-11-21 I Popov vs Kovalenko, 2015
MarkThornton: did Black lose on time?
   Nov-18-20 T H Tylor vs C H Alexander, 1938 (replies)
MarkThornton: And here is an article about Theodore Tylor:
   Aug-02-20 B Annakov vs I Ibragimov, 1993
MarkThornton: 34...Nd5 allows a nice finish, but 34...Nh7 is not much better: 35.Bc4+ Kh8 36.e6 and Black's game looks hopeless.
   May-10-20 Shulman vs The World, 2007
MarkThornton: I have just found this remarkable game, in which a World Champion defeated his immediate predecessor: Kramnik vs Anand, 2008 . It was played not long after this game - was Anand aware of Shulman vs The World?
   Apr-19-19 R Palme vs A Rankis, 1946 (replies)
MarkThornton: White is clearly winning in the final position, so the result given, a draw, is suspect.
   Jun-03-17 I Nikolic vs G Arsovic, 1989 (replies)
MarkThornton: At the 1992 British Chess Championships, in Plymouth, my Rd 8 game lasted for 14.25 hours and 165 moves: I won early in the 6th session. The game reached the endgame of KQ+RP v KQ on move 65, and finished precisely 100 moves later. At the time, someone researched whether it ...
   May-30-17 Korchnoi vs Yudasin, 1994
MarkThornton: After 51...Rxa6, Korchnoi looks to be in trouble, but the Great Defender survived against the odds yet again...
   May-30-17 S Atalik vs G Mohr, 2001
MarkThornton: THe last P capture of the game is on move 87
   May-30-17 K Spraggett vs P Dias, 2001
MarkThornton: BLack's last P is captured on move 47
   May-30-17 G Schories vs P S Leonhardt, 1905
MarkThornton: BLack's last P is captured by 46.Kxe4
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