Igel

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Igel, an UCI compliant open source chess engine by Volodymyr Shcherbyna licensed under the GPL, initially based on GreKo 2018.01 by Vladimir Medvedev.

=Features=

Board Representation

 * Magic Bitboards

Search

 * Lazy SMP
 * Fail Soft Alpha-Beta with Principal Variation Search
 * Extensions and Reductions
 * Variable Aspiration Windows
 * Transposition Table
 * Null Move Pruning with variable R
 * Futility Pruning
 * Late Move Pruning
 * Eval Pruning (a.k.a. static null move)
 * Internal Iterative Deepening in PV-Nodes

Evaluation

 * Material Evaluation
 * Piece-Square Tables
 * Mobility
 * Tapered Eval
 * Pawn Hash Table
 * Passed Pawns Eval
 * Strong Squares (B, N)
 * King Safety

Misc

 * Endgame Tablebases

=Selected Games= Igel 1.8.1 x64 vs. chess22k 1.12 x64, March 11, 2018 by TCEC [Event "TCEC Season 16 - Qualification League"] [Site "http://tcec.chessdom.com"] [Date "2019.07.17"] [Round "9.2"] [White "Igel 1.8.1"] [Black "chess22k 1.12"] [Result "1-0"] [BlackElo "3518"] [ECO "A04"] [GameDuration "01:24:21"] [GameEndTime "2019-07-17T23:28:38.483 W. Europe Standard Time"] [GameStartTime "2019-07-17T22:04:17.414 W. Europe Standard Time"] [Opening "Reti opening"] [PlyCount "302"] [Termination "adjudication"] [TerminationDetails "TCEC win rule"] [TimeControl "1800+5"] [WhiteElo "3245"]

1.Nf3 e6 2.c4 b6 3.Nc3 Bb7 4.e4 c5 5.Be2 Nc6 6.d4 cxd4 7.Nxd4 Qb8 8.O-O Nf6 9.Nc2 Bd6 10.f4 e5 11.f5 Nd4 12.Bd3 Nxc2 13.Bxc2 h6 14.Bd2 Bc5+ 15.Kh1 O-O 16.Qe1 Kh7 17.Nd5 Bxd5 18.cxd5 Bd4 19.Rb1 Rh8 20.Bd3 b5 21.Rf3 Qb6 22.Qh4 a6 23.b3 Rac8 24.Rbf1 b4 25.Bc4 a5 26.Bd3 Bc3 27.Be3 Bd4 28.Bg5 Rc3 29.Bd2 Rc7 30.Rh3 Kg8 31.g4 Rh7 32.Qg3 Rc8 33.Qf3 Qd8 34.Rg3 Qb6 35.Rg2 Rh8 36.Re2 Bc3 37.Bc1 Bd4 38.Qh3 d6 39.Bd2 Bc3 40.Be3 Bd4 41.Rc1 Rxc1+ 42.Bxc1 Nd7 43.Bc4 Qc5 44.Bd2 Nf6 45.Qf3 a4 46.Bc1 a3 47.Rc2 Bc3 48.Be3 Qc7 49.Bf2 Qe7 50.Bh4 Qd8 51.Bd3 Qd7 52.Rg2 Qe7 53.Bb5 Qb7 54.Be2 Kf8 55.Bd3 Ke7 56.Bf2 Nd7 57.Qh3 Rg8 58.Bc4 Rc8 59.Rg1 f6 60.Rb1 Bd4 61.Be1 Kf8 62.Qf1 Nc5 63.Qf3 Qb6 64.Qe2 Nb7 65.Rd1 Nd8 66.h3 Nf7 67.Rd3 Qa5 68.h4 Qb6 69.Bd2 Rb8 70.Rf3 Qb7 71.Qh2 Ke7 72.Rf1 Qc7 73.Qg3 Qb6 74.Bc1 Rc8 75.Rf3 Bc3 76.Qh2 Qd4 77.Qe2 Kf8 78.Rd3 Qa7 79.Qg2 Bd4 80.Bd2 Rb8 81.Rf3 Qe7 82.Rf1 Kg8 83.Qf3 Kh8 84.Rc1 Kh7 85.Bd3 Kg8 86.Qh3 Qa7 87.Kg2 Qe7 88.Qh2 Kh7 89.Kh1 Kg8 90.Qg3 Qd7 91.Rc4 Bc5 92.Kg2 Qb7 93.Rc2 Qe7 94.Rc1 Bd4 95.Kh2 Bc5 96.Qh3 Qd8 97.Kh1 Bd4 98.Qf1 Qe7 99.Qe2 Qd7 100.Rc4 Bc5 101.Rc2 Qb7 102.Rc1 Qd7 103.Qf3 Qb7 104.Rc4 Rf8 105.Rc2 Rb8 106.Qh3 Bd4 107.Rc4 Bc5 108.Be1 Qb6 109.Rc2 Rc8 110.Be2 Qd8 111.Bc4 Ba7 112.Qg3 Qb6 113.Kh2 Qb7 114.Rg2 Bd4 115.Bd2 Kf8 116.Bc1 Qc7 117.Re2 Rb8 118.g5 hxg5 119.hxg5 fxg5 120.Bxg5 Nxg5 121.Qxg5 Qe7 122.Qh5 Kg8 123.Kh1 Qf7 124.Qh3 Qe7 125.Rg2 Rf8 126.Bb5 Rf6 127.Rg4 Bf2 128.Rg5 Bd4 129.Rh5 Rh6 130.Rxh6 gxh6 131.Qxh6 Qg7 132.Qxg7+ Kxg7 133.Kg2 Kf6 134.Kf3 Kg5 135.Ke2 Bc3 136.Kd3 Kf6 137.Bc6 Bd4 138.Kc4 Bc5 139.Bd7 Kf7 140.Kb5 Ke7 141.Be6 Kf6 142.Kc6 Kg5 143.Kc7 Kf6 144.Kd7 Bg1 145.Kxd6 Bb6 146.Kd7 Ba5 147.d6 Bb6 148.Ke8 Ba5 149.d7 Kg7 150.Ke7 Kh6 151.f6 Kh5 1-0

=Forum Posts=

2018

 * Introducing Igel 0.8 engine by Volodymyr Shcherbyna, CCC, July 03, 2018

=External Links=

Chess Engine

 * Igel Home Page
 * CCRL 40/40 Igel
 * CCRL 40/4 Igel

Misc

 * Igel from Wikipedia.de
 * Erinaceidae from Wikipedia
 * Hedgehog from Wikipedia
 * Hedgehog (chess) from Wikipedia

=References= Up one Level