Clemenz Opening

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This article uses algebraic notation to describe chess moves.
Clemenz Opening
Image:chess zhor 26.png
Image:chess zver 26.png a8 rd b8 nd c8 bd d8 qd e8 kd f8 bd g8 nd h8 rd Image:chess zver 26.png
a7 pd b7 pd c7 pd d7 pd e7 pd f7 pd g7 pd h7 pd
a6 b6 c6 d6 e6 f6 g6 h6
a5 b5 c5 d5 e5 f5 g5 h5
a4 b4 c4 d4 e4 f4 g4 h4
a3 b3 c3 d3 e3 f3 g3 h3 pl
a2 pl b2 pl c2 pl d2 pl e2 pl f2 pl g2 pl h2
a1 rl b1 nl c1 bl d1 ql e1 kl f1 bl g1 nl h1 rl
Image:chess zhor 26.png
Moves 1. h3
ECO A00
Origin Blackburne - Noa, London 1883
Named after Hermann Clemenz
Parent Irregular chess opening
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The Clemenz Opening is a chess opening described in algebraic chess notation as

1. h3

It is named after Hermann Clemenz (18461908), an Estonian player. It is considered an irregular opening, so it is classified under the A00 code in the Encyclopaedia of Chess Openings.

Like Anderssen's Opening, 1.a3, 1.h3 is a time-wasting move even though it does not do much harm either. It makes no claim on the central squares, nor does it aid the development of any piece. It also leads to a slight weakening of the king's side, albeit not as severely as Grob's Attack, 1.g4, or Barnes Opening, 1.f3. Since there is no need for White to make such a time-wasting move on the first move, it is among the rarest of the 20 possible first moves. Nevertheless, Michael Basman has experimented with 1.h3, usually following it up with 2.g4 (transposing to the Grob), or 2.a3 followed by a quick c4, a line which has been dubbed the "Creepy Crawly".

Black has a number of playable responses, the most common being 1...d5 and 1...e5, which stake out a claim for central space. Another response, 1...b6, intends to fianchetto a bishop to pressure white's weakened pawns, and forestall a White kingside expansion with g4. If White starts playing well after 1.h3, Black cannot expect any great advantage.

One of the weaker plausible responses by Black would be 1...f5, when White can play 2.d4, transposing to a sharp line against the Dutch Defense introduced by Korchnoi. White's idea is to play 3.g4!? even if it entails a pawn sacrifice (2.g4!? is also possible), one possible continuation being 2.d4 Nf6 3.g4!? fxg4 4.hxg4 Nxg4 5.Qd3 Nf6?? (5...g6! is forced) 6.Rxh7! Rxh7 7.Qg6#.

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