A novelty on move 2, the earliest in chess history?!

Alexander Ipatov interview

World Junior Champion Alexander Ipatov interviewed

The 2018 Spring Chess Classic was an exciting event by the STL Chess Club, comprised of two 10 player round robins. The A group was won by GM Jeffery Xiong who scored 6,5/10 and with the ELO gain will return to the world top 100 players. (replay the games with analysis here)

One of the most interesting games of the round occurred in round 8 between GM Samuel Shankland and GM Alexander Ipatov. Shankland opened with 1.d4 and everyone thought there must have been a transmission error when Ipatov’s reply was reported as 1…Na6. However, the move was correct and it was about to get stranger. 2.c4 was met by 2…e5. GM Ipatov twitted after the game, “after 10 mins of creative over-the-board brainstorming of what to play against the always well-prepared Sam Shankland, I played a novelty as early as move 2. My 17 million game database confirms that! [...] Mega+Engine+Correspondence databases all in one!”

The game continued for 39 moves and finished in a draw. Scroll down to replay with analysis.

Nelson Hernandez on the move 2 novelty by GM Ipatov

Top Chess Engine Championship’s in-house openings chief, Nelson Hernandez, using his considerably larger “Catobase” commented on Shankland – Ipatov, “Traditionally, the word ‘novelty’ has only applied to new positions obtained by titled players. By that definition GM Ipatov is absolutely correct; his opening has never been seen in human tournament play at any level. However, a looser definition which takes into account sources of games that have traditionally not constituted “chess theory”–engine games, games between club players, games played on Internet servers by anonymous nicks–reveals that at least six games have achieved the unusual position after 2…e5.

1. FICS between PlayerA, rated 1972, and PlayerB, rated 2051, 0-1, 2012.09.05
2. FICS between PlayerA, rated 2034, and PlayerB, rated 2075, 0-1, 2012.11.09
3. FICS between PlayerA, rated 2042, and PlayerB, rated 2256, 0-1, 2013.03.17
4. Komodo 9.02 vs Komodo 9.1, 1/2-1/2, 2015.07.19
5. Komodo 9.02 vs Komodo 9.1, 1-0, 2015.07.19
6. Komodo 9.02 vs Komodo 9.1, 1-0, 2015.07.20

Three such games were seen on FICS between nicks rated over 2000 during 2012 and 2013. Three more games were played between two versions of the Komodo (which in 2015 hit major headlines) as part of an opening book test. Interestingly, when humans were playing on FICS the black players scored 3-0–possibly an indication that the unorthodox opening rattled the white players. Conversely, when engines were playing, the disadvantage black was conceding with these moves resulted in a 2.5-0.5 edge for white. Shock tactics don’t work so well against engines!”

More: GM Ipatov on Twitter / Chat and discussion with Nelson Hernandez

Replay Shankland – Ipatov with analysis