Troitzky, 1930.

[Ajedrecista]

Hello:

I was searching a thematic composition of 1930 and I finally found it. Here it is:

http://www.yacpdb.org/?id=281057

[d]n7/8/P2p4/8/1p6/7p/N3B1k1/4K3 w - -

Solution:

1. Bc4 Nc7 (1... Nb6 2. a7) 2. a7 h2 3. a8=Q+ $1 3...
Nxa8 4. Bd5+ Kg1 5. Bh1 $1 5... Nb6 (5... Kxh1 6. Kf2)
(5... b3 6. Nc1 b2 7. Ne2+ Kxh1 8. Kf2 b1=Q 9. Ng3#)
6. Nc1 Nd5 7. Ne2+ Kxh1 8. Kf2 Nf4 9. Ng3# 1-0

Black can delay its lose with 4.- ..., Kg3.

I have tried several top engines and none of them have found Bc4 with short analysis (around three minutes each in an old Dual core of year 2006). I want to ask if longer analysis in faster hardware would find the key move.

I want to note the excellent web Yet another chess problem database, which was unknown to me until now.

Regards from Spain.

Ajedrecista.

[jdart]

Arasan, latest build, with 5-man tablebases:

Code: Select all

 "Troitzky, 1930" bm Bc4
1       0.00    Nxb4    +1.62   119
2       0.00    Bf1+    +1.58   402
2       0.00    Bf1+    +1.58   913
3       0.00    Bc4     +1.38   1976
3       0.00    Bc4     +1.38   2156
4       0.00    Bc4     +1.05   2714
5       0.02    Bc4     +1.05   3669
6       0.02     --     +0.68   5895
6       0.02    Bc4     +0.44   10644
7       0.03    Bd3     +0.38   21689
7       0.03    Bd3     +0.38   22693
8       0.05    Bf1+!   +0.75   43246
8       0.05    Bf1+    +0.84   46292
9       0.05    Bf1+    +0.84   58015
10      0.07    Bf1+    +0.92   76698
11      0.08    Bf1+    +0.96   104132
12      0.11    Bf1+    +0.88   159687
13      0.16    Bf1+    +0.96   273127
14      0.22    Bf1+    +0.88   408345
15      0.30    Bf1+    +0.88   595210
16      0.49    Bf1+    +0.88   1128359
17      0.71    Bf1+    +1.00   1731010
18      1.10    Bf1+    +0.96   2887580
19      1.57    Bf1+    +0.96   4385030
20      2.47    Bf1+    +0.88   7217345
21      4.75    Bf1+    +1.06   15126324
22      9.49    Bf1+    +0.94   30937976
23      22.83   Bf1+    +0.94   78216525
24      29.08   Bf1+    +0.94   99961566
25      39.44   Bf1+    +1.04   137058972
26      88.60   Bc4!    +1.41   316337315
26      163.60  Bc4!    +2.17   594292272
26      205.99  Bc4     +3.41   740426191
27      267.02  Bc4     +3.41   959292483
3.61M nodes/second.
0 tablebase probes, 0 tablebase hits
80535 splits, average thread usage=3.73
result: Bc4     score: +3.41            ++ solved in 88.60 sec. (316.34M nodes)
Bc4 Nc7 a7 b3 Nc3 b2 Bd5+ Kg1 Be4 d5 Nxd5 b1=Q+ Bxb1 h2 Nxc7 h1=Q a8=Q Qh4+ Kd1
Qd4+ Kc1 Qf4+ Kb2 Qxc7 Qg8+ Kf2 Bg6 Qe5+ Kb1 Qg3 Ka2 Ke1 Ka1 Kf2 Kb1 Kg1

solution times:
         0      1      2      3      4      5      6      7      8      9

   0 |        88.60

correct : 1/1
nodes to solution : 316.34M
depth to solution : 25.00
time to solution  : 88.60 sec.
test complete

--Jon

[ernest]

I have tried several top engines and none of them have found Bc4 with short analysis

SMP luck?
On 1st try, Houdini on old dualcore:

n7/8/P2p4/8/1p6/7p/N3B1k1/4K3 w - - 0 1
Analysis by Houdini 3 w32 Nlm:
........
1.Bh5
+/= (0.60 !) Depth: 21/50 00:00:04 16487kN, tb=5
1.Bh5 b3 2.Nc3 h2 3.Ke2 Kg1 4.Bf3 h1Q 5.Bxh1 Kxh1 6.Kd3 Kg2 7.Kc4 b2 8.Kb3 d5 9.Kxb2 d4 10.Nd1 Kf3 11.Kb3 Nb6 12.Kb4 Nc8 13.Kc5 d3 14.Kd4 d2 15.Kd3 Kf4 16.Kxd2 Ke4 17.Kc3 Kd5 18.Kb4 Kc6 19.Ka5 Nd6 20.Ne3 Nb7+ 21.Kb4 Kb6
+/= (0.60) Depth: 21/50 00:00:05 17365kN, tb=5
1.Bh5 b3 2.Nc3 h2 3.Ke2 Kg1 4.Bf3 h1Q 5.Bxh1 Kxh1 6.Kd3 Kg2 7.Kc4 b2 8.Kb3 d5 9.Kxb2 d4 10.Nd1 Kf3 11.Kb3 Nb6 12.Kb4 Nc8 13.Kc5 d3 14.Kd4 d2 15.Kd3 Kf4 16.Kxd2 Ke4 17.Kc3 Kd5 18.Kb4 Kc6 19.Ka5 Nd6 20.Ne3 Nb7+ 21.Kb4 Kb6
+/= (0.60) Depth: 22/50 00:00:05 19879kN, tb=12
1.Bc4
+/= (0.68 !) Depth: 22/50 00:00:09 31038kN, tb=27
1.Bc4
+/- (0.82 !) Depth: 22/50 00:00:09 31955kN, tb=29
1.Bc4
+/- (1.17 !) Depth: 22/50 00:00:09 32213kN, tb=29
1.Bc4 Nc7 2.a7 h2 3.a8Q+ Nxa8 4.Bd5+ Kg3 5.Bxa8 b3 6.Nc1 b2 7.Ne2+ Kg4 8.Nc3 Kf4 9.Kd2 Kg3 10.Ke3 Kg4 11.Be4 Kg3 12.Bf3 Kh4 13.Kf2 Kg5 14.Kg3 Kf5 15.Kxh2 Ke5 16.Kg3 Kd4 17.Nb5+ Kc5 18.Na3 Kb4 19.Nb1
+- (1.48) Depth: 22/50 00:00:09 32602kN, tb=29
1.Bc4
+- (1.56 !) Depth: 22/50 00:00:09 33201kN, tb=29
1.Bc4
+- (1.72 !) Depth: 22/50 00:00:09 33612kN, tb=29
1.Bc4
+- (2.08 !) Depth: 22/50 00:00:09 34164kN, tb=29
1.Bc4
+- (2.96 !) Depth: 22/50 00:00:10 36511kN, tb=29
1.Bc4 Nc7 2.a7 h2 3.a8Q+ Nxa8 4.Bd5+ Kg3 5.Bxa8 b3 6.Nc3 Kf4 7.Kd2 Kg3 8.Nd1 Kf4 9.Kc3 Kg3 10.Kxb3 Kf4 11.Bh1 Kg4 12.Kc2 Kf4 13.Kd2 Kf5 14.Ke3 Ke5 15.Nf2 Kf5 16.Kf3 d5 17.Kg2 d4 18.Kxh2 Kf4 19.Kg2 Ke3 20.Kg3
+- (3.79) Depth: 22/52 00:00:12 41907kN, tb=29
1.Bc4
+- (3.95 !) Depth: 22/52 00:00:13 46620kN, tb=34
1.Bc4 Nc7 2.a7 h2 3.a8Q+ Nxa8 4.Bd5+ Kg3 5.Bxa8 b3 6.Nc3 Kf4 7.Kd2 Kg3 8.Nd1 Kf4 9.Kc3 Kg3 10.Kxb3 Kf4 11.Bh1 Kg4 12.Kc2 Kf4 13.Kd3 Kg3 14.Ke3 Kg4 15.Kf2 Kf4 16.Ne3 Kg5 17.Kg2
+- (3.89) Depth: 22/52 00:00:13 47331kN, tb=34
1.Bc4
+- (4.06 !) Depth: 22/52 00:00:14 51663kN, tb=39
1.Bc4 Nc7 2.a7 h2 3.a8Q+ Nxa8 4.Bd5+ Kg3 5.Bxa8 b3 6.Nc3 Kf4 7.Kd2 Kg3 8.Nd1 Kf4 9.Kc3 Kg3 10.Kxb3 Kf4 11.Bh1 Kg4 12.Kc2 Kf4 13.Kd2 Kg3 14.Ke3 Kg4 15.Nc3 Kf5 16.Kf2 Ke5 17.Kg3 Kd4 18.Nd1 d5 19.Kxh2 Ke5 20.Kg3 d4 21.Kf2
+- (4.37) Depth: 22/52 00:00:16 57029kN, tb=50
1.Bc4
+- (4.55 !) Depth: 23/53 00:00:18 63781kN, tb=57
1.Bc4
+- (4.91 !) Depth: 23/54 00:00:21 75142kN, tb=79
1.Bc4 Nc7 2.a7 h2 3.a8Q+ Nxa8 4.Bd5+ Kg3 5.Bxa8 b3 6.Nc3 Kf4 7.Kd2 Ke5 8.Kd3 b2 9.Kc2 Kd4 10.Kxb2 Kd3 11.Bd5 Kd2 12.Be4 Ke3 13.Kc2 Kd4 14.Kd2 Ke5 15.Ke3 Kf6 16.Bh1 Ke5 17.Kf2 Kd4 18.Nd5 Ke5 19.Kg3 Kf5 20.Kxh2 Ke5 21.Kg3 Kf5 22.Kf3 Ke5 23.Ke3 Ke6 24.Be4 Ke5
+- (5.23) Depth: 23/55 00:00:24 87078kN, tb=92

[zullil]

Hello:

I was searching a thematic composition of 1930 and I finally found it. Here it is:

[d]n7/8/P2p4/8/1p6/7p/N3B1k1/4K3 w - -


I have tried several top engines and none of them have found Bc4 with short analysis
Regards from Spain.

Ajedrecista.

Critter-1.6a (8 threads, 4 GB hash, 5-man GTBs):

Code: Select all

19/43+ 00:07   52777K   7011K  +0.99 Bc4 b3 Bd5+ Kg3 Bxb3 h2 Bd5 Nc7 Bb7 d5
19/43+ 00:07   54629K   7060K  +1.28 Bc4 b3 Bd5+ Kg3 Bxb3 h2 Bd5 Nc7 Bb7 d5
19/49+ 00:08   58001K   7191K  +1.70 Bc4 b3 Bd5+ Kg3 Bxb3 h2 Bd5 Nc7 Bb7 d5
19/49  00:08   63571K   7374K  +2.26 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kh3 Bxa8 b3 Nc3 Kg3 Bh1 b2 Bd5 Kg4 Kd2 Kg3 Kc2 Kf2 Kxb2 Kg1 Ne2+ Kf2 Nd4 Kg1 Nf3+ Kg2 Ng5+ Kg3 Kc3 Kf4 Nf7 Kg3 Kd4 Kf2 Bh1 Kg1
20/49  00:08   66750K   7474K  +2.26 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kh3 Bxa8 b3 Nc3 Kg3 Bh1 b2 Bd5 Kg4 Kd2 Kg3 Kc2 Kf2 Kxb2 Kg1 Ne2+ Kf2 Nd4 Kg1 Nf3+ Kg2 Ng5+ Kg3 Kc3 Kf4 Nf7 Kg3 Kd4 Kf2 Bh1 Kg1
21/49+ 00:10   80848K   7922K  +2.40 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kh3 Bxa8 b3 Nc3 Kg3 Bh1 b2 Bd5 Kg4 Kd2 Kg3 Kc2 Kf2 Kxb2 Kg1 Ne2+ Kf2 Nd4 Kg1 Nf3+ Kg2 Ng5+ Kg3 Kc3 Kf4 Ne6+ Ke3 Nd4 Kf2 Kd2 Kg1 Nf5 Kf2 Bh1 Kg1
21/52  00:11   91834K   8168K  +2.51 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kh3 Bxa8 b3 Nc3 b2 Kd2 Kg3 Ke2 Kf4 Kd1 Ke3 Kc2 b1=Q+ Nxb1 Kf2 Nc3 Ke3 Bh1 Kf2 Bd5 Kg1 Ne2+ Kf2 Nf4 Ke3 Nh3 Kd4 Bh1 Ke3 Kc3 Ke2 Kd4 Kf1 Kd3 Ke1 Kc3 Ke2
22/52+ 00:13  119316K   8773K  +2.67 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kh3 Bxa8 b3 Nc3 b2 Kd2 Kg3 Ke2 Kf4 Kd2 Ke5 Kc2 b1=Q+ Kxb1 Kd4 Kc2 Ke3 Bd5 Kf2 Kd2 Kg1 Ne2+ Kf2 Bh1 d5 Bxd5 Kf1 Kd3 Kf2 Bh1
22/52  00:15  139710K   9018K  +2.81 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kh3 Bxa8 b3 Nc3 b2 Kd2 d5 Bxd5 Kg3 Ke2 Kf4 Bh1 Kg3 Ke3 Kg4 Kd3 Kg3 Ne4+ Kg4 Kc2 Kf4 Kxb2 Ke3 Kc2 Ke2 Nc3+ Kf2 Be4 Ke3 Bd5 Kf2 Kd2 Kf1 Ne2 Kf2 Kd3 Kf1 Bh1 Kf2 Kd2
23/52+ 00:20  195628K   9652K  +2.98 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kh3 Bxa8 b3 Nc3 b2 Kd2 d5 Bxd5 Kg3 Ke2 Kf4 Bh1 Kg3 Ke3 Kg4 Kd3 Kg3 Ne4+ Kg4 Kc2 Kf4 Kxb2 Ke3 Kc2 Ke2 Nc3+ Kf2 Be4 Ke3 Bd5 Kf4 Kd3 Kg4 Ne2
23/52+ 00:25  255416K  10064K  +3.25 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kh3 Bxa8 b3 Nc3 b2 Kd2 d5 Bxd5 Kg3 Ke2 Kf4 Bh1 Kg3 Ke3 Kg4 Kd3 Kg3 Ne4+ Kg4 Kc2 Kf4 Kxb2 Ke3 Kc2 Ke2 Kc3 Kf1 Kd4 Kg1 Ng3 Kf2 Nf5 Kg1
23/54  00:31  327177K  10247K  +3.50 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kg3 Bxa8 b3 Nc3 b2 Bd5 Kf4 Kd2 Kg3 Kc2 Kf2 Kxb2 Kg1 Ne2+ Kf2 Nd4 Kg1 Nf3+ Kg2 Ng5+ Kg3 Bh1 Kh4 Nf3+ Kh3 Kc2 Kg3 Kd3 Kf2 Kd4 Kg3 Ke3 d5 Nd4 Kg4 Bxd5 Kg3 Nf5+ Kh3
24/54+ 00:45  479669K  10615K  +3.72 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kg3 Bxa8 b3 Nc3 b2 Bd5 Kf4 Kd2 Kg3 Kc2 Kf2 Kxb2 Kg1 Ne2+ Kf2 Nd4 Kg1 Nf3+ Kg2 Ng5+ Kg3 Bh1 Kg4 Nf3 Kh3 Kc2 Kg3 Kd3 Kf2 Kd4 Kg3 Ke3 d5 Nd4 Kg4 Bxd5 Kg3 Nf5+ Kh3
24/54+ 01:00  656425K  10847K  +4.05 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kg3 Bxa8 b3 Nc3 b2 Bd5 Kf4 Kd2 Kg3 Kc2 Kf2 Kxb2 Kg1 Ne2+ Kf2 Nd4 Kg1 Nf3+ Kg2 Ng5+ Kg3 Bh1 Kg4 Nf3 Kh3 Kc2 Kg3 Kd3 Kf2 Kd4 Kg3 Ke3 d5 Nd4 Kg4 Bxd5 Kg3 Nf5+ Kh3 Kf2
24/60+ 01:25  946412K  11110K  +4.54 Bc4 Nc7 a7 h2 a8=B+ Nxa8 Bd5+ Kg3 Bxa8 b3 Nc3 b2 Bd5 Kf4 Kd2 Kg3 Kc2 Kf2 Kxb2 Kg1 Ne2+ Kf2 Nd4 Kg1 Nf3+ Kg2 Ng5+ Kg3 Bh1 Kg4 Nf3 Kh3 Kc2 Kg3 Kd3 Kf2 Kd4 Kg3 Ke3 d5 Nd4 Kg4 Bxd5 Kg3 Nf5+ Kh3 Nd4 Kg3
24/67  02:06    1423M  11294K  +5.11 Bc4 Nc7 a7 h2 a8=B+ Kg3 Bh1 Ne8 Nxb4 Nf6 Bcd5 Ng4 Nc6 Ne5 Nd4 Kf4 Kf1 Ng4 Bdf3 Nf6 Kf2 Ke5 Nc6+ Ke6 Nb4 Ke5 Kg2 Kd4 Kxh2 Kc4 Nc6 d5 Kg3 d4 Be2+ Kc3 Ne5 Kd2 Kf2
25/67+ 03:09    2156M  11365K  +5.42 Bc4 Nc7 a7 h2 a8=B+ Kg3 Bh1 Ne8 Nxb4 Nf6 Bcd5 Ng4 Nc6 Ne5 Nd4 Kf4 Kf1 Ng4 Bdf3 Nf6 Kf2 Ke5 Nc6+ Ke6 Nb4 Ke5 Kg2 Kd4 Kxh2 Kc4 Nc6 d5 Kg3 d4 Be2+ Kc3 Ne5 Kd2 Kf2 Kc3
25/67  03:19    2256M  11309K  +5.42 Bc4 Nc7 a7 h2 a8=Q+ Nxa8 Bd5+ Kg3 Bxa8 b3 Nc3 Kf4 Nd1 Ke5 Bh1 Kd4 Ke2 Kc4 Kd2 d5 Ke3 Kc5 Kd3 Kd6 Kd4 Ke7 Bxd5 Kf6 Kc3 Ke5 Bh1 Kf4 Kxb3 Kg3 Kc2 Kh3 Kd2 Kg3 Nc3 Kf4 Kd3 Kg5 Ke3 Kh4 Kd2 Kg3 Ke2 Kg4 Bf3+ Kf4 Be4 Ke5 Ke3 Kf6 Kd3 Ke5 Ke3
26/67  03:51    2631M  11350K  +5.42 Bc4 Nc7 a7 h2 a8=Q+ Nxa8 Bd5+ Kg3 Bxa8 b3 Nc3 Kf4 Nd1 Ke5 Bh1 Kd4 Ke2 Kc4 Kd2 d5 Ke3 Kc5 Kd3 Kd6 Kd4 Ke6 Kc3 Kf5 Ne3+ Kf4 Nf1 b2 Kxb2 d4 Nxh2 Kg3 Nf1+ Kf2 Nd2 d3 Kc3 Ke2 Be4

[Ajedrecista]

Hello again:

I have tried several top engines and none of them have found Bc4 with short analysis

SMP luck?

It must be SMP variance, luck or whatever it is called. Now, Houdini found Bc4 in around a minute:

Code: Select all

[...]

 20/60	01:05	  86.052.519	1.344.000	+2,26	Be2c4 Na8c7 a6a7 h3h2 a7a8Q+ Nc7xa8 Bc4d5+ Kg2g3 Bd5xa8 b4b3 Na2c1 b3b2 Nc1e2+ Kg3h4 Ne2c3 Kh4g3 Ke1e2 Kg3f4 Ke2d3 Kf4g3 Kd3c2 Kg3f2 Kc2xb2 Kf2g1 Nc3e2+ Kg1f2 Ne2d4 Kf2g1 Nd4f3+ Kg1g2 Nf3g5+ Kg2g3 Kb2c3 Kg3f2 Ba8d5 Kf2g3 Kc3d4 Kg3f2 Bd5h1 Kf2g1
 21/60	01:06	  87.214.698	1.345.000	+2,26	Be2c4 Na8c7 a6a7 h3h2 a7a8Q+ Nc7xa8 Bc4d5+ Kg2g3 Bd5xa8 b4b3 Na2c1 b3b2 Nc1e2+ Kg3h4 Ne2c3 Kh4g3 Ke1e2 Kg3f4 Ke2d3 Kf4g3 Kd3e3 Kg3g4 Ke3d2 Kg4g3 Kd2e1 Kg3f4 Ke1d2 Kf4g3 Kd2e1
 22/60	01:07	  88.946.106	1.345.000	+2,26	Be2c4 Na8c7 a6a7 h3h2 a7a8Q+ Nc7xa8 Bc4d5+ Kg2g3 Bd5xa8 b4b3 Na2c1 b3b2 Nc1e2+ Kg3h4 Ne2c3 Kh4g3 Ke1e2 Kg3f4 Ke2d3 Kf4g3 Kd3e3 Kg3g4 Ke3d2 Kg4g3 Kd2e1 Kg3f4 Ke1d2 Kf4g3 Kd2e1
 23/60	01:10	  93.322.652	1.348.000	+2,26	Be2c4 Na8c7 a6a7 h3h2 a7a8Q+ Nc7xa8 Bc4d5+ Kg2g3 Bd5xa8 b4b3 Na2c1 b3b2 Nc1e2+ Kg3h4 Ne2c3 Kh4g3 Ke1e2 Kg3f4 Ke2d3 Kf4g3 Kd3e3 Kg3g4 Ba8h1 Kg4h3 Bh1f3 Kh3g3 Bf3a8 Kg3g4

[...]

 31/63	17:48	1.499.057.190	1.405.000	+6,13	Be2c4 Na8c7 a6a7 h3h2 a7a8Q+ Nc7xa8 Bc4d5+ Kg2g3 Bd5xa8 b4b3 Na2c3 b3b2 Ba8h1 Kg3f4 Ke1d2 Kf4g3 Nc3e4+ Kg3f4 Kd2c2 Kf4e3 Kc2xb2 Ke3d3 Kb2b3 d6d5 Ne4g5 Kd3e3 Ng5h3 d5d4 Nh3g5 d4d3 Ng5f3 Ke3f2 Kb3c3 Kf2e2 Nf3xh2 d3d2 Bh1f3+ Ke2e1 Kc3c2 Ke1f2 Bf3d1 Kf2g2 Nh2g4 Kg2g3 Kc2xd2 Kg3f4 Kd2d3 Kf4f5 Kd3d4 Kf5g6 Kd4e5 Kg6g7 Ke5e6 Kg7g6 Ke6e7 Kg6g7
 32/64	23:04	1.977.280.037	1.430.000	+6,13	Be2c4 Na8c7 a6a7 h3h2 a7a8Q+ Nc7xa8 Bc4d5+ Kg2g3 Bd5xa8 b4b3 Na2c3 b3b2 Ba8h1 Kg3f4 Ke1d2 Kf4g3 Nc3e4+ Kg3f4 Kd2c2 Kf4e3 Kc2xb2 Ke3d3 Kb2b3 d6d5 Ne4g5 Kd3e3 Ng5h3 d5d4 Nh3g5 d4d3 Ng5f3 Ke3f2 Kb3c3 Kf2e2 Nf3xh2 d3d2 Bh1f3+ Ke2e1 Kc3c2 Ke1f2 Bf3d1 Kf2g2 Nh2g4 Kg2g3 Kc2xd2 Kg3f4 Kd2d3 Kf4f5 Kd3d4 Kf5g6 Kd4e5 Kg6g7 Ke5e6 Kg7g6 Ke6e7 Kg6g7 Ng4e5 Kg7h8 Ne5g6+ Kh8g7
 32/69	30:00	2.625.580.810	1.460.000	+6,13	Be2c4 Na8c7 a6a7 h3h2 a7a8Q+ Nc7xa8 Bc4d5+ Kg2g3 Bd5xa8 b4b3 Na2c3 b3b2 Ba8h1 Kg3f4 Ke1d2 Kf4g3 Nc3e4+ Kg3f4 Kd2c2 Kf4e3 Kc2xb2 Ke3e2 Kb2c2 Ke2e3 Kc2c3 d6d5 Ne4g5 d5d4+ Kc3b2 Ke3f2 Ng5f3 d4d3 Kb2c3 d3d2 Kc3xd2 Kf2f1 Kd2c2 Kf1f2 Kc2d3 Kf2f1 Kd3e4 Kf1f2 Ke4d4 Kf2f1 Kd4e5 Kf1f2 Ke5f4 Kf2e2 Nf3xh2 Ke2d2 Kf4e5

I stopped the analysis after half an hour. There were 21,330 TB hits to the full set of Gaviota TB.

Regards from Spain.

Ajedrecista.