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Woodpusher (Computer)

Number of games in database: 19
Years covered: 2004 to 2011
Overall record: +1 -14 =4 (15.8%)*
   * Overall winning percentage = (wins+draws/2) / total games.

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C70 Ruy Lopez (2 games)
A04 Reti Opening (2 games)


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WOODPUSHER (COMPUTER)
(born 1989) United Kingdom

[what is this?]

Its author is John Hamlen. Woodpusher is a small chess program (< 64K) of conventional design. It uses an iterative deepening alpha-beta search with PVS and aspiration window enhancements. The first version of Woodpusher was born in 1989 as part of a university project looking into null-move search techniques by utilizing a database of attacks from and to all the squares on the board (maintained by using CHESS 4.5's bit-board implementation). Such data structures are used for both generating moves and making positional evaluations. Woodpusher's position evaluation intends to include true measures of mobility rather than relying on piece-square evaluations.

https://www.chessprogramming.org/Wo...

Last updated: 2018-12-19 09:33:52

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 page 1 of 1; 19 games  PGN Download 
Game  ResultMoves YearEvent/LocaleOpening
1. Woodpusher vs Falcon  0-1732004World Computer Chess ChampionshipA09 Reti Opening
2. Woodpusher vs IsiChess  ½-½592004World Computer Chess ChampionshipA12 English with b3
3. Deep Junior vs Woodpusher  1-0512004World Computer Chess ChampionshipC70 Ruy Lopez
4. Woodpusher vs Movei  ½-½732004World Computer Chess ChampionshipA15 English
5. Deep Sjeng vs Woodpusher  1-0482004World Computer Chess ChampionshipC70 Ruy Lopez
6. FIBChess vs Woodpusher 0-1432004World Computer Chess ChampionshipD04 Queen's Pawn Game
7. Woodpusher vs Crazy Bishop  ½-½542004World Computer Chess ChampionshipE06 Catalan, Closed, 5.Nf3
8. ParSOS vs Woodpusher 1-0482004World Computer Chess ChampionshipE12 Queen's Indian
9. Woodpusher vs Diep  0-1302004World Computer Chess ChampionshipA04 Reti Opening
10. Shredder vs Woodpusher  1-0412004World Computer Chess ChampionshipC41 Philidor Defense
11. Woodpusher vs Jonny  ½-½952004World Computer Chess ChampionshipA13 English
12. Rookie vs Woodpusher 1-0552011World Computer Chess ChampionshipC45 Scotch Game
13. Woodpusher vs The Baron 0-1432011World Computer Chess ChampionshipE20 Nimzo-Indian
14. HIARCS vs Woodpusher 1-0332011World Computer Chess ChampionshipA01 Nimzovich-Larsen Attack
15. Woodpusher vs Shredder  0-1382011World Computer Chess ChampionshipE91 King's Indian
16. Booot vs Woodpusher  1-0452011World Computer Chess ChampionshipC11 French
17. Junior vs Woodpusher 1-0272011World Computer Chess ChampionshipB33 Sicilian
18. Woodpusher vs Jonny 0-1272011World Computer Chess ChampionshipA04 Reti Opening
19. Woodpusher vs Pandix 0-1442011World Computer Chess ChampionshipC54 Giuoco Piano
 page 1 of 1; 19 games  PGN Download 
  REFINE SEARCH:   White wins (1-0) | Black wins (0-1) | Draws (1/2-1/2) | Woodpusher wins | Woodpusher loses  

Kibitzer's Corner
Nov-20-09  ILikeFruits: my friend...
call me...
woodpusher...
when can...
i break 1000...
comments...
Nov-20-09  WhiteRook48: Woody?
Nov-20-09  Buttinsky: Whoosh Puter
Nov-26-11  brucejavier: Wooden spoon
Nov-27-11  King Death: < brucejavier: Wooden spoon >

A fitting name anyway! If <Woody> hadn't been there, <Rookie> woulda taken it down instead.

Nov-27-11  Marmot PFL: It could sell well at Chrismas if people are looking for a computer they can beat.
Nov-30-11  rapidcitychess: Indeed a Woodpusher...
Dec-02-11  whiteshark: Chess programmer is <John Hamlen>, UK.

<Description given in 1995:>

Woodpusher is a small chess program (< 64K) of conventional design. It uses an iterative deepening alpha-beta search with PVS and aspiration window enhancements. The first version of Woodpusher was born in 1989 as part of a university project looking into null-move search techniques. True to it's origins, this new version of the program still uses the null-move throughout the search to recognize threats and to forward prune branches of the search tree. A database of attacks from and to all the squares on the board is maintained by using CHESS 4.5's bit-board implementation. These data structures are used for both generating moves and making positional evaluations. Woodpusher's position evaluation is maintained almost entirely incrementally while making and un-making moves during the search, with very little work done at the terminal nodes. The evaluation is therefore necessarily simple, but does include true measures of mobility rather than relying on piece-square evaluations.

Source: http://www.grappa.univ-lille3.fr/ic...

Dec-20-14  mrandersson: Woodpusher played a bad 2011 computer championship as we can see. The thing is this version was in fact quite a few years old. This same verison(all be it on a lower spec laptop/pc)was the same as the 2004 one.

It entered the 2011 comp as a exercise to see how much engines have got better over the number of years.

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