# Space

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**Space**,

a loosely defined evaluation feature related to square control, in particular center control considered by piece placement dependent on pawn structure. A player controlling more squares than the other is said to have a spatial advantage ^{[2]}. Tarrasch's concept of force, space and time ^{[3]} and their equivalence (to some extend) is considered by material (force), piece placement and center control (space) and roughly by mobility (space and time).

## Contents

# Implementations

Some programs have explicit evaluation terms concerning space. For instance, Stockfish defines a space area bonus by the number of safe squares for minor pieces on the central four files on ranks 2 to 4, counting twice if on a rearspan of an own pawn. The space area bonus is multiplied by a weight, determined by the number of own pieces minus number of open files ^{[4]}. Toga II 3.0 gives a non-linear bonus for pieces on the opponent half of the board - the more the better ^{[5]}. Senpai 2.0 considers space by the "glorified" pawn chain piece-square tables ^{[6]}.

# See also

- Center Control
- Development
- Distance
- Direction
- Mobility
- Pawn Chain
- Piece-Square Tables
- Search Space
- Space-Time Tradeoff
- Square Control
- Tempo

# Blog & Forum Posts

- Space and the Attack by Bryan Smith, Chess.com, December 08, 2011,
- Space by James Stripes, ChessSkill Blog, June 22, 2013
- Calculating space by Shawn Chidester, CCC, August 07, 2016

- Re: Calculating space by Pawel Koziol, CCC, August 08, 2016

# External Links

## Space in Chess

## Chess in Space

- Chess in Space - NASA 1970 First Chess Experiments from Carolus Chess » Daly CP
- Chess in Space: Houston, we have a checkmate, ChessBase News, August 29, 2008
- NASA - First Earth vs. Space Chess Match Ends – Earth Wins by Greg Chamitoff, December 16, 2009

## Space elsewhere

- space - Wiktionary
- Space from Wikipedia
- Space (disambiguation) from Wikipedia
- Space (mathematics) from Wikipedia
- Euclidean space from Wikipedia

- Space (punctuation) from Wikipedia
- Khôra from Wikipedia
- Space rock from Wikipedia
- Spacetime from Wikipedia
- Address space from Wikipedia
- Calculating Space from Wikipedia » Konrad Zuse
- Memory space from Wikipedia » Memory
- Mental space from Wikipedia
- Outer space from Wikipedia
- Search space from Wikipedia » Search Space
- State space from Wikipedia

# References

- ↑ Image of (1 + 1)-dimensional anti-de Sitter space embedded in flat (1 + 2)-dimensional space. The t1- and t2-axes lie in the plane of rotational symmetry, and the x1-axis is normal to that plane. The embedded surface contains closed timelike curves circling the x1 axis, though these can be eliminated by "unrolling" the embedding (more precisely, by taking the universal cover) - Description from Anti-de Sitter space from Wikipedia - Image "Hyperboloid of one Sheet" by Krishnavedala, May 23, 2011, CC BY-SA 3.0, Wikimedia Commons
- ↑ Glossary of chess - Space
- ↑ Siegbert Tarrasch (
**1931**).*Das Schachspiel*. Die Eröffnung I. Allgemeiner Teil Die Kräfte, Der Raum, Die Zeit (German) - ↑ Stockfish Evaluation Guide Space area, Space
- ↑ Re: Calculating space by Pawel Koziol, CCC, August 08, 2016
- ↑ Senpai – Chess Programming