Perft+Results

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This page contains detailed perft results for several positions that are useful for debugging, beginning with the start position. Captures, checkmates, and other information have been included along with the node counts (leaf nodes, excluding internal or interior nodes) or movepath enumerations. The move counters consider moves to the leaf positions only.

=Initial Position= Obviously, Perft(1) of the initial position is 20, Perft(2) 400. Data of Perft(10) up to Perft(13) was provided by Steven Edwards, generated by Symbolic.
 * [[image:http://webchess.freehostia.com/diag/chessdiag.php?fen=rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR%20w%20-%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000]] ||


 * > **Depth** ||> **Nodes** ||> **Captures** ||> **E.p.** ||> **Castles** ||> **Promotions** ||> **Checks** ||> **Checkmates** ||
 * = 0 ||> 1 ||> 0 ||> 0 ||> 0 ||> 0 ||> 0 ||> 0 ||
 * = 1 ||> 20 ||> 0 ||> 0 ||> 0 ||> 0 ||> 0 ||> 0 ||
 * = 2 ||> 400 ||> 0 ||> 0 ||> 0 ||> 0 ||> 0 ||> 0 ||
 * = 3 ||> 8,902 ||> 34 ||> 0 ||> 0 ||> 0 ||> 12 ||> 0 ||
 * = 4 ||> 197,281 ||> 1576 ||> 0 ||> 0 ||> 0 ||> 469 ||> 8 ||
 * = 5 ||> 4,865,609 ||> 82719 ||> 258 ||> 0 ||> 0 ||> 27351 ||> 347 ||
 * = 6 ||> 119,060,324 ||> 2812008 ||> 5248 ||> 0 ||> 0 ||> 809099 ||> 10828 ||
 * = 7 ||> 3,195,901,860 ||||||||||||  ||
 * = 8 ||> 84,998,978,956 ||||||||||||  ||
 * = 9 ||> 2,439,530,234,167 ||||||||||||  ||
 * = 10 ||> 69,352,859,712,417 ||||||||||||  ||
 * = 11 ||> 2,097,651,003,696,806 ||||||||||||  ||
 * = 12 ||> 62,854,969,236,701,747 |||||||||||| ||
 * = 13 ||> 1,981,066,775,000,396,239 ||||||||||||  ||
 * = 14 ||> 61,885,021,521,585,529,237 |||||||||||| ||
 * = 15 ||> 2,015,099,950,053,364,471,960 |||||||||||| ||

Perft 10

 * Perft(10) 20 draft 9 Positions
 * Perft(10) 400 draft 8 Positions

Perft 11

 * Perft(11) 20 draft 10 Positions
 * Perft(11) 400 draft 9 Positions

Perft 12

 * Perft(12) 20 draft 11 Positions
 * Perft(12) 400 draft 10 Positions

Perft 13

 * Perft(13) 20 draft 12 Positions
 * Perft(13) 400 draft 11 Positions

Summary
 =Position 2= also know as "Kiwipete" by Peter McKenzie
 * Initial Position Summary
 * Perft(15)
 * [[image:http://webchess.freehostia.com/diag/chessdiag.php?fen=r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R%20w%20-%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000]] ||

 =Position 3=
 * > **Depth** ||> **Nodes** ||> **Captures** ||> **E.p.** ||> **Castles** ||> **Promotions** ||> **Checks** ||> **Checkmates** ||
 * = 1 ||> 48 ||> 8 ||> 0 ||> 2 ||> 0 ||> 0 ||> 0 ||
 * = 2 ||> 2039 ||> 351 ||> 1 ||> 91 ||> 0 ||> 3 ||> 0 ||
 * = 3 ||> 97862 ||> 17102 ||> 45 ||> 3162 ||> 0 ||> 993 ||> 1 ||
 * = 4 ||> 4085603 ||> 757163 ||> 1929 ||> 128013 ||> 15172 ||> 25523 ||> 43 ||
 * = 5 ||> 193690690 ||> 35043416 ||> 73365 ||> 4993637 ||> 8392 ||> 3309887 ||> 30171 ||
 * [[image:http://webchess.freehostia.com/diag/chessdiag.php?fen=8/2p5/3p4/KP5r/1R3p1k/8/4P1P1/8%20w%20-%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000]] ||

 =Position 4= Or mirrored (with the same perft results): r2q1rk1/pP1p2pp/Q4n2/bbp1p3/Np6/1B3NBn/pPPP1PPP/R3K2R b KQ - 0 1 ||
 * > **Depth** ||> **Nodes** ||> **Captures** ||> **E.p.** ||> **Castles** ||> **Promotions** ||> **Checks** ||> **Checkmates** ||
 * = 1 ||> 14 ||> 1 ||> 0 ||> 0 ||> 0 ||> 2 ||> 0 ||
 * = 2 ||> 191 ||> 14 ||> 0 ||> 0 ||> 0 ||> 10 ||> 0 ||
 * = 3 ||> 2812 ||> 209 ||> 2 ||> 0 ||> 0 ||> 267 ||> 0 ||
 * = 4 ||> 43238 ||> 3348 ||> 123 ||> 0 ||> 0 ||> 1680 ||> 17 ||
 * = 5 ||> 674624 ||> 52051 ||> 1165 ||> 0 ||> 0 ||> 52950 ||> 0 ||
 * = 6 ||> 11030083 ||> 940350 ||> 33325 ||> 0 ||> 7552 ||> 452473 ||> 2733 ||
 * = 7 ||> 178633661 ||> 14519036 ||> 294874 ||> 0 ||> 140024 ||> 12797406 ||> 87 ||
 * [[image:http://webchess.freehostia.com/diag/chessdiag.php?fen=r3k2r/Pppp1ppp/1b3nbN/nP6/BBP1P3/q4N2/Pp1P2PP/R2Q1RK1%20w%20kq%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000]] ||
 * r3k2r/Pppp1ppp/1b3nbN/nP6/BBP1P3/q4N2/Pp1P2PP/R2Q1RK1 w kq - 0 1

 =Position 5= This position was discussed on Talkchess and caught bugs in engines several years old at depth 3 and was also reported wrong here, hopefully now corrected with the results given by Steven Edwards, July 18, 2015
 * > **Depth** ||> **Nodes** ||> **Captures** ||> **E.p.** ||> **Castles** ||> **Promotions** ||> **Checks** ||> **Checkmates** ||
 * = 1 ||> 6 ||> 0 ||> 0 ||> 0 ||> 0 ||> 0 ||> 0 ||
 * = 2 ||> 264 ||> 87 ||> 0 ||> 6 ||> 48 ||> 10 ||> 0 ||
 * = 3 ||> 9467 ||> 1021 ||> 4 ||> 0 ||> 120 ||> 38 ||> 22 ||
 * = 4 ||> 422333 ||> 131393 ||> 0 ||> 7795 ||> 60032 ||> 15492 ||> 5 ||
 * = 5 ||> 15833292 ||> 2046173 ||> 6512 ||> 0 ||> 329464 ||> 200568 ||> 50562 ||
 * = 6 ||> 706045033 ||> 210369132 ||> 212 ||> 10882006 ||> 81102984 ||> 26973664 ||> 81076 ||
 * [[image:http://webchess.freehostia.com/diag/chessdiag.php?fen=rnbq1k1r/pp1Pbppp/2p5/8/2B5/8/PPP1NnPP/RNBQK2R%20w%20KQ%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000]] ||

 =Position 6= An alternative Perft given by Steven Edwards
 * > **Depth** ||> **Nodes** ||
 * = 1 ||> 44 ||
 * = 2 ||> 1,486 ||
 * = 3 ||> 62,379 ||
 * = 4 ||> 2,103,487 ||
 * = 5 ||> 89,941,194 ||
 * [[image:http://webchess.freehostia.com/diag/chessdiag.php?fen=r4rk1/1pp1qppp/p1np1n2/2b1p1B1/2B1P1b1/P1NP1N2/1PP1QPPP/R4RK1%20w%20-%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000]] ||


 * > **Depth** ||> **Nodes** ||
 * = 0 ||> 1 ||
 * = 1 ||> 46 ||
 * = 2 ||> 2,079 ||
 * = 3 ||> 89,890 ||
 * = 4 ||> 3,894,594 ||
 * = 5 ||> 164,075,551 ||
 * = 6 ||> 6,923,051,137 ||
 * = 7 ||> 287,188,994,746 ||
 * = 8 ||> 11,923,589,843,526 ||
 * = 9 ||> 490,154,852,788,714 ||

=Forum Posts=

2000 ...

 * [|kiwipete perft position] by Russell Reagan, CCC, January 04, 2003 » Peter McKenzie, Kiwipete
 * [|perft results (how accurate is accurate enough ?)] by Roman Hartmann, CCC, September 23, 2004

2010 ...

 * [|REPORT: wrong perft result by qperft] by Jesús Muñoz, CCC, February 14, 2012 » Position 5
 * [|Perft and en_passant] by Harald Lüßen, CCC, September 11, 2012 » En passant
 * [|Perft(14) estimates thread] by Steven Edwards, CCC, February 26, 2013
 * [|Perft(15) estimates thread] by Steven Edwards, CCC, April 10, 2013
 * [|An altenative perft initial FEN] by Steven Edwards, CCC, July 11, 2013
 * [|Impossible perft question] by Andy Duplain, CCC, August 01, 2013 » Position 3
 * [|Wide open perft] by Steven Edwards, CCC, August 18, 2013
 * [|Perft(14) revisited] by Steven Edwards, CCC, August 08, 2014
 * [|Perft(14) Weekly Status Report] by Steven Edwards, CCC, August 24, 2014
 * [|Perft(14) verification] by Steven Edwards, CCC, December 28, 2014

2015 ...
> [|Re: yet another attempt on Perft(14)] by Ankan Banerjee, CCC, September 09, 2016 > [|Re: perft(15)] by Ankan Banerjee, CCC, August 25, 2017
 * [|Perft(14) Weekly Status Reports for 2015] by Steven Edwards, CCC, January 04, 2015
 * [|Perft for various positions] by Alexandru Mosoi, CCC, January 17, 2015
 * [|Some Chess960/FRC positions to be confirmed] by Reinhard Scharnagl, CCC, February 09, 2015 » Chess960
 * [|kiwipete perft position] by Henk van den Belt, CCC, March 26, 2015 » Kiwipete
 * [|Perft(14) Weekly Status Reports for 2016] by Steven Edwards, CCC, December 29, 2015
 * 2016**
 * [|A perft(7) challenge position] by Steven Edwards, CCC, April 07, 2016
 * [|Another perft(7) challenge position] by Steven Edwards, CCC, April 13, 2016
 * [|Perft(7) challenge position #3] by Steven Edwards, CCC, April 20, 2016
 * [|Perft(7) challenge position #4] by Steven Edwards, CCC, April 25, 2016
 * [|Perft(7) challenge position #5] by Steven Edwards, CCC, April 25, 2016
 * [|Another perft(7) challenge] by Steven Edwards, CCC, May 08, 2016
 * [|Perft(7) challenge position #6] by Steven Edwards, CCC, May 10, 2016
 * [|Perft(7) 64 bit hash mismatch set 8] by Steven Edwards, CCC, May 22, 2016
 * [|Twenty-nine perft(7) mismatches from work unit 528] by Steven Edwards, CCC, July 25, 2016
 * [|yet another attempt on Perft(14)] by Ankan Banerjee, CCC, August 13, 2016
 * [|Two perft(7) mismatches from work unit 571] by Steven Edwards, CCC, September 04, 2016
 * 2017**
 * [|perft(15)] by Ankan Banerjee, CCC, August 25, 2017 » Perft(15)

=External Links=
 * [|µ-Max Dowload Page - qperft] by Harm Geert Muller
 * [|perft-random.epd] by Marcel van Kervinck
 * [|Crafty Command Documentation] by Robert Hyatt, see Crafty perft
 * [|Sharper - Perft calculation] by Albert Bertilsson
 * [|Distributed Perft Project] by Albert Bertilsson
 * [|perft, divide, debugging a move generator] from ROCE by Roman Hartmann
 * [|Perft], search the CCC Archives
 * [|chess, number of games, sequences related to (start)] from the [|On-Line Encyclopedia of Integer Sequences]
 * [|Statistics on chess games] by François Labelle
 * [|Perft - sample test positions] used by Numpty chess
 * [|PerfT] by Reinhard Scharnagl

=References= =What links here?= include component="backlinks" page="Perft Results" limit="60"
 * Up one level**