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ChessBrainVB,
an open source chess engine by Roger Zuehlsdorf, written in Visual Basic to run under 32-bit Windows, first announced and released in September 2015 ^[1]. The common source subset could either compiled using Visual Basic 6.0 to create a Winboard compliant executable - or, albeit about 15 times slower, may be interpreted by Visual Basic for Applications to run under Microsoft Office applications, that is Word, Excel, or PowerPoint, along with an own GUI based on Windows Forms.

ChessBrainVB was intially based on the source code of LarsenVB by Luca Dormio, which in turn was inspired by the C program Faile 0.6 by Adrien M. Regimbald. Still using the 10x12 mailbox board representation, ChessBrainVB's search ^[2] and evaluation subsequently improved influenced by ideas from open source programs such as CuckooChess, Sjeng, Protector and Stockfish combined with own ideas ^[3].

Screenshot

ChessBrainVBA [4]

Features

^[5].

Board Representation

• 10x12 Board
• Piece-Lists

Search

• Iterative Deepening
• Aspiration Windows
• Principal Variation Search
• Transposition Table
• Move Ordering
  Hash Move
  Internal Iterative Deepening
  In Check
  Countermove Heuristic
  Counter Moves History
  Killer Heuristic
  MVV/LVA
  Piece-Square Tables
  SEE
• Selectivity
  Check Extensions
  Futility Pruning
  Mate Distance Pruning
  Null Move Pruning
  Late Move Reductions
  Razoring
• Quiescence Search

Evaluation

• Tapered Eval
• Material
• Piece-Square Tables
• Center Control
• Mobility
  Trapped Pieces
  Rooks on (Semi) Open Files
• Pawn Structure
  Backward Pawn
  Doubled Pawn
  Isolated Pawn
  Phalanx
• Passed Pawns
• King Safety
  Pawn Shelter
  Pawn Storm
  Square Control
• Tempo

See also

• Brain
• Chess Brain
• ChessBrain

Forum Posts

• My new exotic engine: ChessBrainVB for OfficeVBA (1950 ELO) by Roger Zuehlsdorf, CCC, September 20, 2015
• ChessBrainVB V2.0 released (WB 2600 ELO, Office VBA 2100ELO) by Roger Zuehlsdorf, CCC, February 24, 2016
• ChessBrain VB 3.02 - release by Norbert Raimund Leisner, CCC, December 12, 2016
• ChessBrain VB 3.20 released by Norbert Raimund Leisner, CCC, March 13, 2017
• ChessBrainVB 3.30 released by Norbert Raimund Leisner, CCC, June 06, 2017
• ChessBrainVB 3.31 (WB-Engine) release by Norbert Raimund Leisner, CCC, June 17, 2017
• WinBoard 4.8.0 and ChessBrainVB by Norbert Raimund Leisner, CCC, June 17, 2017

External Links

• GitHub - RZulu54/ChessBrainVB: Chess engine with GUI for Excel / Word VBA - plus VB6 (Visual Basic 6) edition as winboard engine
• ChessBrainVB 3.20 in CCRL 40/4

References

1. ^ My new exotic engine: ChessBrainVB for OfficeVBA (1950 ELO) by Roger Zuehlsdorf, CCC, September 20, 2015
2. ^ ChessBrainVB/Search.bas at master · RZulu54/ChessBrainVB · GitHub
3. ^ ChessBrainVB/ChessBrainVB_Notes.txt at master · RZulu54/ChessBrainVB · GitHub
4. ^ ChessBrainVB/ChessBrainVBA_Screenshot.jpg at master · RZulu54/ChessBrainVB · GitHub
5. ^ Featuresbased on V3.31 · RZulu54/ChessBrainVB@870f735 · GitHub

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