The opening achieves nothing in terms of development or control of the center and it makes no attempt to exploit white’s first move advantage. By playing in the center and gaining a slight lead in development black can try to exploit the fact that white has wasted time with 1.h2, bit there is no refutation. The Clemenz is probably best described as indifferent.
Nevertheless, IM Michael Basman has experimented with it and sometimes follows it up with 2.g4 as in the Grob Attaxk (1.g4) or 2.a3 followed by a quick c2–c4, a line that has been dubbed the Creepy Crawly or the Global Opening.
The 1990 Great Britain Championship was held in Eastbourne anf was won by James Plaskeyy with a 9-1 score.
The participants in this game were: Michael Basman (2370) who finished wit a 6-4 score which left him tied for places 22-32 (out of 74) and Niall Carton (2220) who scored 5-5 and tied for places 46-51.
Michael Basman–Niall Carton1–0A00British Chamo, EastbourneEastbourne ch-GB1990Stocjfish 17
A00: Clemenz/Anderssen Opening 1.h3 The Clemenz Opening. e5 Here are the top four Stockfish replies. All result in complete equality, so there appears to be no refutation to white's strange beginning. 1...e5 2.e4 f6 3.c3 b4 4.a3 a5 5.f3 0-0 6.e2 e8 7.b4 b6 8.0-0 d5 9.d3 c6 10.g5 d4 1...d5 2.d4 c5 3.e3 f6 4.f3 g6 5.b5+ d7 6.e2 g7 7.0-0 0-0 8.c3 f5 9.bd2 c7 10.a4 c8 1...f6 2.d4 d5 3.f4 c5 4.e3 b6 5.c3 xb2 6.b5 a6 7.b1 xa2 8.a1 b2 9.b1 a2 White can repeat moves with 10.Ra1 or play 10.dxc5. Either way the evaluation is 0.00 1...c5 2.e4 g6 3.f3 c6 4.c4 g7 5.c3 e6 6.d4 d5 7.exd5 exd5 8.b3 cxd4 9.cxd4 ge7 10.0-0 e6 2.a3 The Clemenz Opening is combined with the Anderssen Opening (1.a3). 2.c3 d5 3.d4 f6 4.dxe5 fxe5 5.e4 f6 6.e3 Black is slightly better. Prohaszka,P (2331)-Pilgaard,K (2415) Budapest FS09 GM 2005 2...g6 A novelty, but any reasonable move is playable. 2...a5 Weird. It makes no sense, but the position remains equal. 3.c4 c6 4.c3 g6 5.g4 h5 6.gxh5 xh5 Black is a wee but better. Basman,M (2365)-Quinn,M BCF-ch 79th Plymouth 1992 (2) 2...f5 3.g4 d5 4.gxf5 xf5 5.d3 f6 6.g2 c5 B;ack is better. Kaplan,A (2146)-Djokic,M (2192) Titled Tue, chess.com INT 2023 3.d4 g7 4.dxe5 c6 5.c3 xe5 6.e4 Even with offbeat opening general pronciples are still valids. With this move whte stakes a claim in the center d6 7.f3 xf3+ 8.xf3 In spite of his bizarre opening play white ha incurred no disadvantage. e6 9.e2 h6 10.e3 e7 11.d1 a6 12.0-0 c6 13.g3 h5 Black is taking the wrong approach and ends up leaving his K in the center too long...a violation of general principles. 13...xc3 is superior. 14.bxc3 e7 15.b1 0-0-0 with about equal chances. 14.f4 White is more active. h4 Black could still have played in the note to the last move. After this his troubles multiply. 15.f2 His best tey was still 15...Bxc3 d7 16.d5 The N is destined to do some damage. e6 17.c4 White has two good plans. This advance on the Q-side and the advance of the f-Pawn. d7 17...xd5 18.cxd5 e7 19.d4 xd4 20.xd4 followed by f5 when white's attack will prove decisive. 18.b4 Can black castle out of trouble? Let's see. f5 18...0-0 19.f5 ...ripping the guts out of black's position. xd5 19...gxf5 20.exf5 xf5 21.xf5 xf5 22.xf5 Black has lost a piece. 20.exd5 b8 20...e7 21.f6 21.f6 h8 22.d4 and white is winning. 18...0-0-0 19.b1 e7 20.b5 a5 21.fd1 xd5 22.cxd5 and if black tried to stop the advance of white's b-Pawn with... b6 wite wins with... 23.xb6 cxb6 24.xb6 b7 25.xa5 The K has to flee. d7 26.b6 e8 27.a4 19.exf5 xf5 20.f3 Also good was the immediate 20.c5 f8 21.c5 e8 21...dxc5 22.xc5+ f7 23.b6 22.cxd6 cxd6 23.b6 c7 24.c4 e7 Losing a piece, but his position was hopeless anyway. 25.fe1 d4 26.xd4 Black resigned. 1–0
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