Natwarlal

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Natwarlal, a Chess Engine Communication Protocol compliant open source chess engine by Pallav Nawani, written in C++ and released under the MIT license. Natwarlal played the CCT9 with respectable 4/7. The name of the engine was inspired by Mithilesh Kumar Srivastava, better known as Natwarlal, a Indian con man known for having repeatedly "sold" the Taj Mahal, the Red Fort, and the Rashtrapati Bhavan and also the Parliament House of India along with its 545 sitting members. He was a living-legend in his lifetime and a legend even after his death.

=Features=

Board Representation

 * 0x88
 * Piece-Lists

Search

 * Iterative Deepening
 * Aspiration Windows
 * NegaScout
 * Transposition Table
 * Zobrist Hashing
 * Move Ordering
 * Hash Move
 * Internal Iterative Deepening
 * MVV/LVA
 * Static Exchange Evaluation
 * Mate Killers
 * Selectivity
 * Botvinnik-Markoff Extension
 * Check Extensions
 * Mate Threat Extensions
 * One Reply Extensions
 * Passed Pawn Extensions
 * Recapture Extensions
 * Late Move Reductions
 * Null Move Pruning
 * Futility Pruning
 * See Pruning
 * Quiescence Search

Evaluation

 * Material
 * Bishop Pair
 * Piece-Square Tables
 * Mobility
 * Rooks on (Semi) Open Files
 * Rook on 7th Rank
 * Pawn Structure
 * Pawn Hash Table
 * Backward Pawn
 * Doubled Pawn
 * Isolated Pawn
 * Passed Pawn
 * King Safety
 * Castling Rights
 * Pawn Shield
 * King Piece Tropism
 * King close to open or half-open files

=Selected Games= CCT9, Natwarlal - Berta [Event "CCT9"] [Site "Internet Chess Club"] [Date "2007.02.18"] [Round "?"] [White "Natwarlal"] [Black "Berta"] [Result "1-0"] 1.e4 e6 2.Nf3 d5 3.Nc3 Nf6 4.exd5 exd5 5.d4 c6 6.Bd3 Be7 7.O-O O-O 8.Re1 Bg4 9.h3 Bh5 10.Bf4 Bd6 11.Be5 Bb4 12.Bf5 Nfd7 13.Bf4 Bxc3 14.bxc3 Nb6 15.Rb1 N8d7 16.Qd3 Nf6 17.Bg5 h6 18.Bh4 g6 19.Ne5 Qd6 20.a4 Rae8 21.Qg3 Re7 22.Re3 Rd8 23.Rb4 Kf8 24.a5 gxf5 25.axb6 a5 26.Ra4 Ne4 27.Qf4 Ng5 28.Bxg5 hxg5 29.Qxg5 f6 30.Qxh5 fxe5 31.Rg3 Rf7 32.Rg6 Qxg6 33.Qxg6 exd4 34.cxd4 Ra8 35.f4 Rg7 36.Qxf5 Kg8 37.Qe6 Kh7 38.f5 Rf8 39.Rxa5 Rfg8 40.g4 Rf8 41.f6 Rgf7 42.g5 Kg6 43.Ra3 c5 44.Rf3 Kh7 45.g6 Kh8 46.gxf7 Ra8 47.Qxd5 Ra1 48.Kf2 Rf1 49.Kxf1 cxd4 50.Qh5#

=Forum Posts=

2004

 * New chess engine by Pallav Nawani, Winboard Forum, March 16, 2004
 * Natwarlal V0.03 by Pallav Nawani, Winboard Forum, May 29, 2004
 * Just released Natwarlal v0.04 by Pallav Nawani, Winboard Forum, July 01, 2004
 * Natwarlal v0.05 by Pallav Nawani, Winboard Forum, July 12, 2004
 * With big hash Natwarlal v0.06 searches pretty fast... by Dann Corbit, Winboard Forum, September 24, 2004
 * Natwarlal V0.07 by Pallav Nawani, Winboard Forum, September 26, 2004
 * Natwarlal V0.08 by Pallav Nawani, Winboard Forum, October 10, 2004
 * Natwarlal v0.09 by Pallav Nawani, Winboard Forum, October 31, 2004

2005

 * Natwarlal 0.06....a tactical monster! by Dr.Wael Deeb, Winboard Forum, February 04, 2005
 * Natwarlal v0.10 by Pallav Nawani, Winboard Forum, February 28, 2005
 * Natwarlal v0.11 by Pallav Nawani, Winboard Forum, March 06, 2005
 * Natwarlal Remarks by Marc D, CCC, March 15, 2005
 * Re: New Engine classifications by Pallav Nawani, Winboard Forum, April 08, 2005
 * Re: copying evaluation of other programs by Pallav Nawani, Winboard Forum, May 12, 2005
 * Re: copying evaluation of other programs by Pallav Nawani, Winboard Forum, May 13, 2005
 * Re: how much open source code did you read and understand? by Pallav Nawani, Winboard Forum, June 30, 2005
 * Re: Piece-list representation by Pallav Nawani, Winboard Forum, July 17, 2005

=External Links=

Chess Engine

 * Pallav's Domain - Natwarlal
 * Index of /chess/engines/Jim Ablett/NATWARLAL by Jim Ablett, hosted by Kirill Kryukov
 * Mac Chess Engines Repository hosted by Julien Marcel
 * Natwarlal 0.14 in CCRL 40/15

Misc

 * from Wikipedia
 * Mr. Natwarlal from Wikipedia
 * Raja Natwarlal from Wikipedia

=References= Up one Level