Perft Results

Edit 24 86 …
Home * Board Representation * Move Generation * Perft * Results

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 [1] .
external image RNBQKBNR%20w%20-%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000
rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1

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
 [2]
13
 1,981,066,775,000,396,239
14
 61,885,021,521,585,529,237
 [3]
15
 2,015,099,950,053,364,471,960
 [4]

Perft 10


Perft 11


Perft 12


Perft 13


Summary


Position 2

also know as "Kiwipete" by Peter McKenzie [5]
external image R3K2R%20w%20-%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000
r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq -

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

Position 3

external image 8%20w%20-%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000
8/2p5/3p4/KP5r/1R3p1k/8/4P1P1/8 w - -

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
 [6] 674624
 52051
 1165
 0
 0
 52950
 0
6
 11030083
 940350
 33325
 0
 7552
 452473
 2733
7
 178633661
 14519036
 294874
 0
 140024
 12797406
 87

Position 4

external image 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
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
 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

Position 5

This position was discussed on Talkchess [7] and caught bugs in engines several years old at depth 3 [8] and was also reported wrong here [9], hopefully now corrected with the results given by Steven Edwards, July 18, 2015 [10]
external image RNBQK2R%20w%20KQ%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000
rnbq1k1r/pp1Pbppp/2p5/8/2B5/8/PPP1NnPP/RNBQK2R w KQ - 1 8

Depth
 Nodes
1
 44
2
 1,486
3
 62,379
4
 2,103,487
5
 89,941,194

Position 6

An alternative Perft given by Steven Edwards [11] [12]
external image R4RK1%20w%20-%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000
r4rk1/1pp1qppp/p1np1n2/2b1p1B1/2B1P1b1/P1NP1N2/1PP1QPPP/R4RK1 w - - 0 10

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 ...

2010 ...

2015 ...

2016
2017

External Links


References

  1. ^ Perft FEN data by Steven Edwards, CCC, November 18, 2012
  2. ^ Perft(12) count confirmed by Steven Edwards, CCC, April 25, 2011
  3. ^ Re: yet another attempt on Perft(14) by Ankan Banerjee, CCC, September 09, 2016
  4. ^ Re: perft(15) by Ankan Banerjee, CCC, August 25, 2017
  5. ^ kiwipete perft position by Russell Reagan, CCC, January 04, 2003
  6. ^ Impossible perft question by Andy Duplain, CCC, August 01, 2013
  7. ^ REPORT: wrong perft result by qperft by Jesús Muñoz, CCC, February 14, 2012
  8. ^ Re: REPORT: wrong perft result by qperft by Julien MARCEL, CCC, February 14, 2012
  9. ^ Re: Correction of my error by Eugene Kotlov, CCC, July 17, 2015
  10. ^ Re: Correction of my error by Steven Edwards, CCC, July 18, 2015
  11. ^ An altenative perft() initial FEN by Steven Edwards, CCC, July 11, 2013
  12. ^ Some perft() results for that alternative test position by Steven Edwards, CCC, August 26, 2013

What links here?

Page Date Edited
Albert Bertilsson Jun 6, 2017
Alexandru Mosoi Jan 8, 2018
Chess960 Sep 27, 2016
Engine Testing Feb 1, 2018
Guidance for Creating New Pages Dec 15, 2014
Initial Position Apr 14, 2018
Initial Position Summary Nov 21, 2012
Jonathan Warkentin Jun 29, 2014
Move Generation Jan 29, 2018
Perft Sep 26, 2017
Perft Results Feb 10, 2018
Perft(10) 20 draft 9 Positions Nov 21, 2012
Perft(10) 400 draft 8 Positions Nov 21, 2012
Perft(11) 20 draft 10 Positions Nov 21, 2012
Perft(11) 400 draft 9 Positions Nov 21, 2012
Perft(12) 20 draft 11 Positions Nov 21, 2012
Perft(12) 400 draft 10 Positions Nov 21, 2012
Perft(13) 20 draft 12 Positions Nov 21, 2012
Perft(13) 400 draft 11 Positions Nov 21, 2012
Peter McKenzie Jan 7, 2016
Reinhard Scharnagl Apr 9, 2016
Rolf C. Smith Aug 25, 2014
Russell Reagan Aug 31, 2013
Sharper Jun 6, 2017
Steven Edwards Aug 26, 2017

Up one level