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Created page with "'''Home * Engines * Chepla''' '''Chepla''',<br/> a private WinBoard compliant <ref>[http://wbec-ridderkerk.nl/html/part.htm Participants] WBEC|WBEC Ri..."
'''[[Main Page|Home]] * [[Engines]] * Chepla'''
'''Chepla''',<br/>
a private [[WinBoard]] compliant <ref>[http://wbec-ridderkerk.nl/html/part.htm Participants] [[WBEC|WBEC Ridderkerk]]</ref> chess engine by [[Mikael Bäckman]],
apparently a plain [[Fail-Soft|fail-soft]] [[Alpha-Beta|alpha-beta]] searcher <ref>[https://www.stmintz.com/ccc/index.php?id=316955 Is this a correct fail-soft?] by [[Mikael Bäckman]], [[CCC]], September 21, 2003</ref> with impressive search [[Depth|depths]] and [[Nodes per Second|nodes per second]],
while the former was caused by not using [[Recapture Extensions|recapture extensions]] and using [[Late Move Reductions|late move pruning]] <ref>[https://www.stmintz.com/ccc/index.php?id=490381 Re: pmess at cct] by [[Mikael Bäckman]], [[CCC]], February 28, 2006</ref>.
Chepla's [[Evaluation|evaluation]] is fast and simple, uses [[Lazy Evaluation|lazy evaluation]] and an [[Evaluation Hash Table|evaluation cache]] otherwise <ref>[https://www.stmintz.com/ccc/index.php?id=355224 Before I completely forget about this... Thanks to Scott Farrell] by [[Mikael Bäckman]], [[CCC]], March 17, 2004</ref>.
Chepla played the [[CCT6]], [[CCT7]] and [[CCT8]] [[CCT Tournaments|tournaments]].
=Selected Games=
[[CCT6]], round 8, [[MessChess]] - [[Chepla]] <ref>[http://www.vrichey.de/cct6/ CCT6 - PGN download] hosted by [[Volker Richey]]</ref> <ref>[https://www.stmintz.com/ccc/index.php?id=490035 pmess at cct] by [[Mridul Muralidharan]], [[CCC]], February 27, 2006</ref>
<pre>
[Event "CCT6"]
[Site "Internet Chess Club"]
[Date "2004.02.01"]
[Round "8"]
[White "MessChess"]
[Black "Chepla"]
[Result "0-1"]
1.e4 c5 2.c3 d6 3.d4 Nf6 4.Bd3 cxd4 5.cxd4 g6 6.Nc3 Bg7 7.f3 Nc6 8.Nge2 Bd7 9.O-O O-O 10.Be3 Qb6
11.Qd2 Qa5 12.Bc4 Rfc8 13.Rac1 Qd8 14.a3 Na5 15.Ba2 Nc4 16.Bxc4 Rxc4 17.Bg5 Rac8 18.b3 R4c6 19.d5
R6c7 20.Qe3 b5 21.b4 Rc4 22.Rfd1 Qc7 23.Nb1 Qb7 24.Rc3 Qa6 25.Rcd3 Rc2 26.Nd4 R2c7 27.Bh6 Bxh6
28.Qxh6 Qa4 29.Nb3 Nh5 30.Na5 f5 31.Qe3 f4 32.Qe1 Ng7 33.Rb3 e5 34.dxe6 Bxe6 35.Rbd3 Ne8 36.e5 d5
37.Rd4 g5 38.h4 h6 39.hxg5 hxg5 40.R4d3 Ng7 41.Nb3 Bf5 42.Nc5 Rxc5 43.bxc5 Bxd3 44.Rxd3 Qc4 45.Rc3
Qd4+ 46.Qf2 Qxe5 47.Rc1 Nf5 48.c6 Ne3 49.Qe1 Qe6 50.Qc3 Nc4 51.Qd4 Rxc6 52.Qxa7 Qe3+ 53.Qxe3 fxe3
54.Rd1 Kf7 55.Kf1 Ke6 56.Rd3 Rc5 57.Nc3 Ke5 58.Ne2 Rc7 59.Nc3 d4 60.Nxb5 Rd7 61.g3 Rd5 62.a4 Nb2
63.Rb3 Nxa4 64.Ke2 Nc5 65.Rb1 Ne6 66.Na3 Rc5 67.Rb6 Kd5 68.Ra6 Rc8 69.Rb6 Ra8 70.Nb5 Ra4 71.Rd6+
Ke5 72.Rd7 Ra2+ 73.Ke1 g4 74.fxg4 Ke4 75.Ra7 Rc2 76.Nd6+ Kf3 77.Rf7+ Kxg3 78.Nf5+ Kxg4 79.Kd1 e2+
80.Kxc2 e1=Q 81.Kd3 Qc3+ 82.Ke4 Ng5+ 0-1
</pre>
=Forum Posts=
* [https://www.stmintz.com/ccc/index.php?id=316807 What does your engine play in this position?] by [[Mikael Bäckman]], [[CCC]], September 20, 2003
* [https://www.stmintz.com/ccc/index.php?id=316955 Is this a correct fail-soft?] by [[Mikael Bäckman]], [[CCC]], September 21, 2003 » [[Fail-Soft]]
* [https://www.stmintz.com/ccc/index.php?id=336036 Re: Endgame evaluation : Chepla -1.81] by [[Mikael Bäckman]], [[CCC]], December 14, 2003
* [https://www.stmintz.com/ccc/index.php?id=355224 Before I completely forget about this... Thanks to Scott Farrell] by [[Mikael Bäckman]], [[CCC]], March 17, 2004
* [https://www.stmintz.com/ccc/index.php?id=424222 Re: tough position] by [[Mikael Bäckman]], [[CCC]], May 04, 2005
=External Links=
* [https://en.wiktionary.org/wiki/che che - Wiktionary]
* [https://en.wiktionary.org/wiki/pla pla - Wiktionary]
=References=
<references />
'''[[Engines|Up one level]]'''
[[Category:Private]]
[[Category:WinBoard]]
[[Category:X86]]
[[Category:PC]]
[[Category:Windows]]
'''Chepla''',<br/>
a private [[WinBoard]] compliant <ref>[http://wbec-ridderkerk.nl/html/part.htm Participants] [[WBEC|WBEC Ridderkerk]]</ref> chess engine by [[Mikael Bäckman]],
apparently a plain [[Fail-Soft|fail-soft]] [[Alpha-Beta|alpha-beta]] searcher <ref>[https://www.stmintz.com/ccc/index.php?id=316955 Is this a correct fail-soft?] by [[Mikael Bäckman]], [[CCC]], September 21, 2003</ref> with impressive search [[Depth|depths]] and [[Nodes per Second|nodes per second]],
while the former was caused by not using [[Recapture Extensions|recapture extensions]] and using [[Late Move Reductions|late move pruning]] <ref>[https://www.stmintz.com/ccc/index.php?id=490381 Re: pmess at cct] by [[Mikael Bäckman]], [[CCC]], February 28, 2006</ref>.
Chepla's [[Evaluation|evaluation]] is fast and simple, uses [[Lazy Evaluation|lazy evaluation]] and an [[Evaluation Hash Table|evaluation cache]] otherwise <ref>[https://www.stmintz.com/ccc/index.php?id=355224 Before I completely forget about this... Thanks to Scott Farrell] by [[Mikael Bäckman]], [[CCC]], March 17, 2004</ref>.
Chepla played the [[CCT6]], [[CCT7]] and [[CCT8]] [[CCT Tournaments|tournaments]].
=Selected Games=
[[CCT6]], round 8, [[MessChess]] - [[Chepla]] <ref>[http://www.vrichey.de/cct6/ CCT6 - PGN download] hosted by [[Volker Richey]]</ref> <ref>[https://www.stmintz.com/ccc/index.php?id=490035 pmess at cct] by [[Mridul Muralidharan]], [[CCC]], February 27, 2006</ref>
<pre>
[Event "CCT6"]
[Site "Internet Chess Club"]
[Date "2004.02.01"]
[Round "8"]
[White "MessChess"]
[Black "Chepla"]
[Result "0-1"]
1.e4 c5 2.c3 d6 3.d4 Nf6 4.Bd3 cxd4 5.cxd4 g6 6.Nc3 Bg7 7.f3 Nc6 8.Nge2 Bd7 9.O-O O-O 10.Be3 Qb6
11.Qd2 Qa5 12.Bc4 Rfc8 13.Rac1 Qd8 14.a3 Na5 15.Ba2 Nc4 16.Bxc4 Rxc4 17.Bg5 Rac8 18.b3 R4c6 19.d5
R6c7 20.Qe3 b5 21.b4 Rc4 22.Rfd1 Qc7 23.Nb1 Qb7 24.Rc3 Qa6 25.Rcd3 Rc2 26.Nd4 R2c7 27.Bh6 Bxh6
28.Qxh6 Qa4 29.Nb3 Nh5 30.Na5 f5 31.Qe3 f4 32.Qe1 Ng7 33.Rb3 e5 34.dxe6 Bxe6 35.Rbd3 Ne8 36.e5 d5
37.Rd4 g5 38.h4 h6 39.hxg5 hxg5 40.R4d3 Ng7 41.Nb3 Bf5 42.Nc5 Rxc5 43.bxc5 Bxd3 44.Rxd3 Qc4 45.Rc3
Qd4+ 46.Qf2 Qxe5 47.Rc1 Nf5 48.c6 Ne3 49.Qe1 Qe6 50.Qc3 Nc4 51.Qd4 Rxc6 52.Qxa7 Qe3+ 53.Qxe3 fxe3
54.Rd1 Kf7 55.Kf1 Ke6 56.Rd3 Rc5 57.Nc3 Ke5 58.Ne2 Rc7 59.Nc3 d4 60.Nxb5 Rd7 61.g3 Rd5 62.a4 Nb2
63.Rb3 Nxa4 64.Ke2 Nc5 65.Rb1 Ne6 66.Na3 Rc5 67.Rb6 Kd5 68.Ra6 Rc8 69.Rb6 Ra8 70.Nb5 Ra4 71.Rd6+
Ke5 72.Rd7 Ra2+ 73.Ke1 g4 74.fxg4 Ke4 75.Ra7 Rc2 76.Nd6+ Kf3 77.Rf7+ Kxg3 78.Nf5+ Kxg4 79.Kd1 e2+
80.Kxc2 e1=Q 81.Kd3 Qc3+ 82.Ke4 Ng5+ 0-1
</pre>
=Forum Posts=
* [https://www.stmintz.com/ccc/index.php?id=316807 What does your engine play in this position?] by [[Mikael Bäckman]], [[CCC]], September 20, 2003
* [https://www.stmintz.com/ccc/index.php?id=316955 Is this a correct fail-soft?] by [[Mikael Bäckman]], [[CCC]], September 21, 2003 » [[Fail-Soft]]
* [https://www.stmintz.com/ccc/index.php?id=336036 Re: Endgame evaluation : Chepla -1.81] by [[Mikael Bäckman]], [[CCC]], December 14, 2003
* [https://www.stmintz.com/ccc/index.php?id=355224 Before I completely forget about this... Thanks to Scott Farrell] by [[Mikael Bäckman]], [[CCC]], March 17, 2004
* [https://www.stmintz.com/ccc/index.php?id=424222 Re: tough position] by [[Mikael Bäckman]], [[CCC]], May 04, 2005
=External Links=
* [https://en.wiktionary.org/wiki/che che - Wiktionary]
* [https://en.wiktionary.org/wiki/pla pla - Wiktionary]
=References=
<references />
'''[[Engines|Up one level]]'''
[[Category:Private]]
[[Category:WinBoard]]
[[Category:X86]]
[[Category:PC]]
[[Category:Windows]]
