Hello Martin:
FWIW, here are JetChess perft counter results:
------------------------
First position:
[d]8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
1 Qf3-e4 1
2 Qf3-d5 1
3 Qf3-c6 1
4 Qf3*b7 1
5 Qf3-g4 1
6 Qf3-h5 1
7 Qf3-e2 1
8 Qf3-d1 1
9 Qf3-f4 1
10 Qf3-f5 1
11 Qf3-f6 1
12 Qf3-f7 1
13 Qf3-f8 1
14 Qf3-g3 1
15 Qf3-h3 1
16 Qf3-e3 1
17 Qf3-d3 1
18 Qf3-c3 1
19 Qf3-b3 1
20 Qf3-a3 1
21 Qf3-f2 1
22 Qf3-f1 1
23 Kg2-h2 1
24 Kg2-h3 1
25 Kg2-f1 1
26 Kg2-g1 1
27 Kg2*h1 1
Total: 27
27 (move pathes after 1 half move).
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
1 Qf3-e4 16
2 Qf3-d5 16
3 Qf3-c6 15
4 Qf3*b7 14
5 Qf3-g4 15
6 Qf3-h5 15
7 Qf3-e2 15
8 Qf3-d1 5
9 Qf3-f4 12
10 Qf3-f5 16
11 Qf3-f6 17
12 Qf3-f7 16
13 Qf3-f8 16
14 Qf3-g3 16
15 Qf3-h3 16
16 Qf3-e3 13
17 Qf3-d3 15
18 Qf3-c3 17
19 Qf3-b3 16
20 Qf3-a3 16
21 Qf3-f2 16
22 Qf3-f1 4
23 Kg2-h2 15
24 Kg2-h3 15
25 Kg2-f1 15
26 Kg2-g1 15
27 Kg2*h1 13
Total: 390
390 (move pathes after 2 half moves).
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
1 Qf3-e4 410
2 Qf3-d5 422
3 Qf3-c6 361
4 Qf3*b7 291
5 Qf3-g4 337
6 Qf3-h5 386
7 Qf3-e2 354
8 Qf3-d1 22
9 Qf3-f4 314
10 Qf3-f5 465
11 Qf3-f6 428
12 Qf3-f7 410
13 Qf3-f8 407
14 Qf3-g3 367
15 Qf3-h3 368
16 Qf3-e3 327
17 Qf3-d3 368
18 Qf3-c3 365
19 Qf3-b3 400
20 Qf3-a3 381
21 Qf3-f2 318
22 Qf3-f1 82
23 Kg2-h2 411
24 Kg2-h3 381
25 Kg2-f1 320
26 Kg2-g1 367
27 Kg2*h1 292
Total: 9354
9,354 (move pathes after 3 half moves).
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
1 Qf3-e4 5899
2 Qf3-d5 6608
3 Qf3-c6 5432
4 Qf3*b7 3953
5 Qf3-g4 4844
6 Qf3-h5 5551
7 Qf3-e2 4713
8 Qf3-d1 379
9 Qf3-f4 4250
10 Qf3-f5 6799
11 Qf3-f6 6427
12 Qf3-f7 6259
13 Qf3-f8 6299
14 Qf3-g3 5330
15 Qf3-h3 5519
16 Qf3-e3 4394
17 Qf3-d3 5033
18 Qf3-c3 5056
19 Qf3-b3 5880
20 Qf3-a3 5895
21 Qf3-f2 4107
22 Qf3-f1 1126
23 Kg2-h2 5836
24 Kg2-h3 5349
25 Kg2-f1 4573
26 Kg2-g1 5214
27 Kg2*h1 3442
Total: 134167
134,167 (move pathes after 4 half moves).
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
1 Qf3-e4 138960
2 Qf3-d5 155852
3 Qf3-c6 121304
4 Qf3*b7 83809
5 Qf3-g4 107489
6 Qf3-h5 119826
7 Qf3-e2 103674
8 Qf3-d1 1258
9 Qf3-f4 102071
10 Qf3-f5 158339
11 Qf3-f6 145979
12 Qf3-f7 143477
13 Qf3-f8 136666
14 Qf3-g3 113119
15 Qf3-h3 118792
16 Qf3-e3 102035
17 Qf3-d3 110892
18 Qf3-c3 105554
19 Qf3-b3 126624
20 Qf3-a3 120367
21 Qf3-f2 86114
22 Qf3-f1 20972
23 Kg2-h2 126411
24 Kg2-h3 111919
25 Kg2-f1 85841
26 Kg2-g1 106717
27 Kg2*h1 68598
Total: 2922659
2,922,659 (move pathes after 5 half moves).
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
1 Qf3-e4 2043067
2 Qf3-d5 2400718
3 Qf3-c6 1875494
4 Qf3*b7 1179900
5 Qf3-g4 1577369
6 Qf3-h5 1789106
7 Qf3-e2 1498385
8 Qf3-d1 23534
9 Qf3-f4 1460575
10 Qf3-f5 2379999
11 Qf3-f6 2202790
12 Qf3-f7 2189457
13 Qf3-f8 2117195
14 Qf3-g3 1616046
15 Qf3-h3 1769424
16 Qf3-e3 1446800
17 Qf3-d3 1613799
18 Qf3-c3 1540867
19 Qf3-b3 1920057
20 Qf3-a3 1851273
21 Qf3-f2 1205034
22 Qf3-f1 321529
23 Kg2-h2 1841479
24 Kg2-h3 1616605
25 Kg2-f1 1189022
26 Kg2-g1 1506314
27 Kg2*h1 783792
Total: 42959630
42,959,630 (move pathes after 6 half moves).
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
1 Qf3-e4 44252259
2 Qf3-d5 51796142
3 Qf3-c6 39893873
4 Qf3*b7 24406651
5 Qf3-g4 33595491
6 Qf3-h5 37403885
7 Qf3-e2 31348692
8 Qf3-d1 97895
9 Qf3-f4 32503481
10 Qf3-f5 51405304
11 Qf3-f6 47637692
12 Qf3-f7 47023255
13 Qf3-f8 44057526
14 Qf3-g3 33558958
15 Qf3-h3 36392227
16 Qf3-e3 31633575
17 Qf3-d3 33779341
18 Qf3-c3 31914699
19 Qf3-b3 39645781
20 Qf3-a3 36734943
21 Qf3-f2 25046125
22 Qf3-f1 6136738
23 Kg2-h2 37846214
24 Kg2-h3 32303239
25 Kg2-f1 22440757
26 Kg2-g1 30357266
27 Kg2*h1 15585287
Total: 898797296
898,797,296 (move pathes after 7 half moves).
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
1 Qf3-e4 679398792
2 Qf3-d5 818211933
3 Qf3-c6 636311309
4 Qf3*b7 362615718
5 Qf3-g4 513893076
6 Qf3-h5 581538175
7 Qf3-e2 479915024
8 Qf3-d1 1942029
9 Qf3-f4 479826230
10 Qf3-f5 801569459
11 Qf3-f6 743662006
12 Qf3-f7 738633069
13 Qf3-f8 698864140
14 Qf3-g3 501420741
15 Qf3-h3 560378434
16 Qf3-e3 466204810
17 Qf3-d3 519668407
18 Qf3-c3 491717592
19 Qf3-b3 623626109
20 Qf3-a3 581173372
21 Qf3-f2 373707786
22 Qf3-f1 104168822
23 Kg2-h2 584042362
24 Kg2-h3 495811901
25 Kg2-f1 314299765
26 Kg2-g1 439912431
27 Kg2*h1 183502917
Total: 13776016409
13,776,016,409 (move pathes after 8 half moves).
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
1 Qf3-e4 14121497680
2 Qf3-d5 16912831764
3 Qf3-c6 13095468820
4 Qf3*b7 7354886931
5 Qf3-g4 10591111014
6 Qf3-h5 11829340293
7 Qf3-e2 9761516479
8 Qf3-d1 7743493
9 Qf3-f4 10210708624
10 Qf3-f5 16591304499
11 Qf3-f6 15471611915
12 Qf3-f7 15239601790
13 Qf3-f8 14238403577
14 Qf3-g3 10229529752
15 Qf3-h3 11353583884
16 Qf3-e3 9794154338
17 Qf3-d3 10568629839
18 Qf3-c3 9979277108
19 Qf3-b3 12579228547
20 Qf3-a3 11510736023
21 Qf3-f2 7665402220
22 Qf3-f1 1997500610
23 Kg2-h2 11660507736
24 Kg2-h3 9693913965
25 Kg2-f1 5989115732
26 Kg2-g1 8820377379
27 Kg2*h1 3666868008
Total: 280934852020
280,934,852,020 (move pathes after 9 half moves).
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
1 Qf3-e4 229051918319
2 Qf3-d5 279913009105
3 Qf3-c6 219025117242
4 Qf3*b7 117591776369
5 Qf3-g4 171218402338
6 Qf3-h5 193577642122
7 Qf3-e2 158744542570
8 Qf3-d1 164182745
9 Qf3-f4 157427397766
10 Qf3-f5 271783797498
11 Qf3-f6 253632232167
12 Qf3-f7 250905997217
13 Qf3-f8 235729250880
14 Qf3-g3 162724064213
15 Qf3-h3 184037916652
16 Qf3-e3 151196637763
17 Qf3-d3 172788014801
18 Qf3-c3 163426496951
19 Qf3-b3 208299912413
20 Qf3-a3 191480280026
21 Qf3-f2 122607502461
22 Qf3-f1 37023130162
23 Kg2-h2 192714491938
24 Kg2-h3 160300032793
25 Kg2-f1 86594354892
26 Kg2-g1 132955498297
27 Kg2*h1 46248557504
Total: 4551162157204
4,551,162,157,204 (move pathes after 10 half moves).
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
1 Qf3-e4 4639240576627
2 Qf3-d5 5643850258030
3 Qf3-c6 4408578155286
4 Qf3*b7 2352954475738
5 Qf3-g4 3451130305535
6 Qf3-h5 3870284702050
7 Qf3-e2 3167251824222
8 Qf3-d1 703637654
9 Qf3-f4 3255840729546
10 Qf3-f5 5486343980658
11 Qf3-f6 5148457931823
12 Qf3-f7 5054982106848
13 Qf3-f8 4724108757950
14 Qf3-g3 3268935659958
15 Qf3-h3 3678391789721
16 Qf3-e3 3103067435753
17 Qf3-d3 3455087808740
18 Qf3-c3 3273555340342
19 Qf3-b3 4145011419201
20 Qf3-a3 3778864861725
21 Qf3-f2 2470715600826
22 Qf3-f1 709187300245
23 Kg2-h2 3782089600933
24 Kg2-h3 3098518454062
25 Kg2-f1 1666255902064
26 Kg2-g1 2654869996046
27 Kg2*h1 927271888594
Total: 91215550500177
91,215,550,500,177 (move pathes after 11 half moves).
Code: Select all
8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7
perft( 1) = 27
perft( 2) = 390
perft( 3) = 9,354
perft( 4) = 134,167
perft( 5) = 2,922,659
perft( 6) = 42,959,630
perft( 7) = 898,797,296
perft( 8) = 13,776,016,409
perft( 9) = 280,934,852,020
perft(10) = 4,551,162,157,204
perft(11) = 91,215,550,500,177
------------------------
Second position:
[d]8/6kR/8/8/8/bq6/1rqqqqqq/K1nqnbrq b - - 0 1
Code: Select all
8/6kR/8/8/8/bq6/1rqqqqqq/K1nqnbrq b - - 0 1
1 qc2*h7 1
2 qh2*h7 1
3 kg7*h7 1
4 kg7-f6 1
5 kg7-g6 1
6 kg7-f8 1
7 kg7-g8 1
Total: 7
7 (move pathes after 1 half move).
Code: Select all
8/6kR/8/8/8/bq6/1rqqqqqq/K1nqnbrq b - - 0 1
1 qc2*h7 0
2 qh2*h7 0
3 kg7*h7 0
4 kg7-f6 13
5 kg7-g6 13
6 kg7-f8 13
7 kg7-g8 13
Total: 52
52 (move pathes after 2 half moves).
Code: Select all
8/6kR/8/8/8/bq6/1rqqqqqq/K1nqnbrq b - - 0 1
1 qc2*h7 0
2 qh2*h7 0
3 kg7*h7 0
4 kg7-f6 1173
5 kg7-g6 1134
6 kg7-f8 1150
7 kg7-g8 1136
Total: 4593
4,593 (move pathes after 3 half moves).
Code: Select all
8/6kR/8/8/8/bq6/1rqqqqqq/K1nqnbrq b - - 0 1
1 qc2*h7 0
2 qh2*h7 0
3 kg7*h7 0
4 kg7-f6 12875
5 kg7-g6 12407
6 kg7-f8 12568
7 kg7-g8 12418
Total: 50268
50,268 (move pathes after 4 half moves).
Code: Select all
8/6kR/8/8/8/bq6/1rqqqqqq/K1nqnbrq b - - 0 1
1 qc2*h7 0
2 qh2*h7 0
3 kg7*h7 0
4 kg7-f6 1203890
5 kg7-g6 1130012
6 kg7-f8 1161600
7 kg7-g8 1138882
Total: 4634384
4,634,384 (move pathes after 5 half moves).
Code: Select all
8/6kR/8/8/8/bq6/1rqqqqqq/K1nqnbrq b - - 0 1
1 qc2*h7 0
2 qh2*h7 0
3 kg7*h7 0
4 kg7-f6 12918613
5 kg7-g6 12129128
6 kg7-f8 12434860
7 kg7-g8 12202759
Total: 49685360
49,685,360 (move pathes after 6 half moves).
Code: Select all
8/6kR/8/8/8/bq6/1rqqqqqq/K1nqnbrq b - - 0 1
1 qc2*h7 0
2 qh2*h7 0
3 kg7*h7 0
4 kg7-f6 1257041566
5 kg7-g6 1160039868
6 kg7-f8 1204915549
7 kg7-g8 1181183228
Total: 4803180211
4,803,180,211 (move pathes after 7 half moves).
Code: Select all
8/6kR/8/8/8/bq6/1rqqqqqq/K1nqnbrq b - - 0 1
1 qc2*h7 0
2 qh2*h7 0
3 kg7*h7 0
4 kg7-f6 13231048562
5 kg7-g6 12207734928
6 kg7-f8 12669010038
7 kg7-g8 12429964013
Total: 50537757541
50,537,757,541 (move pathes after 8 half moves).
Code: Select all
8/6kR/8/8/8/bq6/1rqqqqqq/K1nqnbrq b - - 0 1
1 qc2*h7 0
2 qh2*h7 0
3 kg7*h7 0
4 kg7-f6 1330980120571
5 kg7-g6 1212934307577
6 kg7-f8 1276610769146
7 kg7-g8 1255748211784
Total: 5076273409078
5,076,273,409,078 (move pathes after 9 half moves).
Code: Select all
8/6kR/8/8/8/bq6/1rqqqqqq/K1nqnbrq b - - 0 1
perft(1) = 7
perft(2) = 52
perft(3) = 4,593
perft(4) = 50,268
perft(5) = 4,634,384
perft(6) = 49,685,360
perft(7) = 4,803,180,211
perft(8) = 50,537,757,541
perft(9) = 5,076,273,409,078
------------------------
Regards from Spain.
Ajedrecista.