Another perft(7) challenge position

[sje]

Another perft(7) challenge position, this from Perft(14) work unit 413 (line 92,766):
[d]rnbq1b1r/ppppkppp/4pn2/8/1Q6/2PP4/PP2PPPP/RNB1KBNR b KQ - 2 4[/d]

One program says 3,016,077,677.

Another program says 3,016,055,832.

What does your program say?

[bob]

Another perft(7) challenge position, this from Perft(14) work unit 413 (line 92,766):
[d]rnbq1b1r/ppppkppp/4pn2/8/1Q6/2PP4/PP2PPPP/RNB1KBNR b KQ - 2 4[/d]

One program says 3,016,077,677.

Another program says 3,016,055,832.

What does your program say?

Crafty says the second one was right...

Crafty v25.1c

machine has 4 processors

White(1): rnbq1b1r/ppppkppp/4pn2/8/1Q6/2PP4/PP2PPPP/RNB1KBNR b KQ - 2 4
Black(1): perft 7
total moves=3016055832 time=94.63
Black(1):

[Robert Pope]

Same for Abbess:
perft 7: 3,016,055,832 nodes

[pkumar]

My engine gives:
D7 3016055832

[xmas79]

NGN says:

Code: Select all

fen rnbq1b1r/ppppkppp/4pn2/8/1Q6/2PP4/PP2PPPP/RNB1KBNR b KQ - 2 4
OK
perftfastmt 7
Time elapsed: 11.13300 seconds
Total leaf nodes: 3016055832
270.9M LNPS

[Michel]

GnuCheese: Perft(7)=3016055832 time=80.27s nps=647917

[brtzsnr]

Zurichess agrees with the second number

Code: Select all

$ go run perft.go --fen "rnbq1b1r/ppppkppp/4pn2/8/1Q6/2PP4/PP2PPPP/RNB1KBNR b KQ - 2 4" --max_depth 8
Searching FEN "rnbq1b1r/ppppkppp/4pn2/8/1Q6/2PP4/PP2PPPP/RNB1KBNR b KQ - 2 4"
depth        nodes   captures enpassant castles   promotions eval  KNps   elapsed
-----+------------+----------+---------+---------+----------+-----+------+-------
    1            3          0         0         0          0          49 61.715µs
    2          118          6         0         0          0        1384 85.258µs
    3         3022         87         0         0          0         131 23.053814ms
    4       113355       7658         0         0          0        4628 24.490962ms
    5      3007414     131775        32         0          0        9274 324.285563ms
    6    109477393    8886368       537     28312          0       34647 3.159824654s
    7   3016055832  174603538     70325         0          0       37464 1m20.506237628s

[Evert]

Jazz:

Code: Select all

setboard rnbq1b1r/ppppkppp/4pn2/8/1Q6/2PP4/PP2PPPP/RNB1KBNR b KQ - 2 4
 8♜ ♞ ♝ ♛   ♝   ♜ *
 7♟ ♟ ♟ ♟ ♚ ♟ ♟ ♟ 
 6        ♟ ♞     
 5                
 4  ♛             
 3    ♟ ♟         
 2♟ ♟     ♟ ♟ ♟ ♟ 
 1♜ ♞ ♝   ♚ ♝ ♞ ♜ 
  a b c d e f g h 
#0b (f)+>perft 7
 1          3  0.00    375000.00nps
 2        118  0.00   4538461.54nps
 3       3022  0.00  13371681.42nps
 4     113355  0.01  14986118.46nps
 5    3007414  0.16  18743036.99nps
 6  109477393  4.83  22679875.71nps
 7 3016055832 153.83  19606760.75nps

[Ajedrecista]

Hello Steven:

Here is the divided perft that confirms others' results:

Code: Select all

Intel Pentium D930 (3 GHz).
JetChess 1.0.0.0 (single core, 32-bit, hash = 256 MB).

rnbq1b1r/ppppkppp/4pn2/8/1Q6/2PP4/PP2PPPP/RNB1KBNR b KQ - 2 4

  1   c7-c5   888323498
  2   d7-d6   973582576
  3  ke7-e8  1154149758

Total:       3016055832

3,016,055,832 (move pathes after 7 half moves).

Time: 13.125 s (0:00:13.125).

Regards from Spain.

Ajedrecista.

[Henk]

Skipper3 agrees with Perft(5) = 3007414. Cost 25 seconds and I don't care.