66.8M
positions
12.0M
practically solved
240.39T
engine nodes
1.9M
analyses
6,680
in queue
18
active workers
128
active cores
39.2M
nodes / sec
29.4
positions / min
57
proof number
3,835
disproof number
Root conquest: 0/20 first moves solved · 18.0% of tree positions solved · last 24h: 314,900 closures, 5.65T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 197 open obligations, of which 33 (16.8%) sit at or below dn 2, one unanswered question from falling over · 0 open nodes on impossible numbers · positions a visitor asked for close in 5.5h (median of 176) · measured at 2026-09-29 09:00 UTC
Closures by source, last 24h (314804 of 314850 labelled): USER 99.8% (314065) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (739) · last 7d (1735030 of 1735080): USER 97.5% (1691642) · FILL 0.5% (8795) · AUTO 1.8% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2528). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f6 2. Nc3 h6 … Rc8 11. Bb2 Nh6 12. Bxf6 Rb8 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … Rc8 11. Bb2 Nh6 12. Bxf6 Rc7 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … b5 11. O-O d5 12. Re1 Be7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … b5 11. O-O d5 12. Re1 Bg7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … b5 11. O-O d5 12. Re1 Bh6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
Play to explore drag a piece or click two squares
Keyboard move list
First moves from the starting position
| move | state | eval | visits | |
|---|---|---|---|---|
| g1f3 | unsolved | 1100 | 2 | |
| g1h3 | unsolved | 807 | 2 | |
| d2d4 | unsolved | 437 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| e2e3 | unsolved | 415 | 3 | |
| b1c3 | unsolved | 142 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -100 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| f2f3 | unsolved | -110 | 3 | |
| d2d3 | unsolved | -116 | 2 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -301 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -502 | 2 | |
| g2g4 | unsolved | -600 | 2 | |
| c2c4 | unsolved | -700 | 3 |
Contributors by engine nodes
Every position in this tree was searched by somebody's machine. Ties share a place, and the share is measured against everything the whole fleet searched in that window.
Last 24 hours
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | gannet 25.7% of the fleet | 1.45T | 3,434 |
| 2 | BManBJ 25.4% of the fleet | 1.44T | 10,556 |
| 3 | auranvesdranor 18.6% of the fleet | 1.05T | 8,004 |
| 4 | randomchampgamer 10.8% of the fleet | 608.12B | 4,977 |
| 5 | tenzink 9.7% of the fleet | 548.02B | 3,479 |
| 6 | RickEdinson 3.2% of the fleet | 182.90B | 1,187 |
| 7 | MoNiKaMaDnEsS 2.8% of the fleet | 158.59B | 1,206 |
| 8 | uipio 2.4% of the fleet | 137.24B | 493 |
| 9 | rhaxier 1.2% of the fleet | 66.09B | 448 |
| 10 | soothdest 0.2% of the fleet | 12.60B | 95 |
and 1 more.
11 accounts · 5.65T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.5% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.5% of the fleet | 37.18T | 310,298 |
| 3 | BManBJ 12.0% of the fleet | 28.84T | 199,488 |
| 4 | auranvesdranor 11.6% of the fleet | 27.82T | 200,674 |
| 5 | JackIV 4.2% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.2% of the fleet | 10.05T | 73,729 |
| 7 | RickEdinson 2.8% of the fleet | 6.68T | 44,257 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.30T | 27,771 |
| 9 | NeoArcturus 1.7% of the fleet | 4.09T | 16,758 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 25 more.
35 accounts · 240.53T nodes searched by the whole fleet.
Proposed campaigns
Anyone can put a line up and vote for it. The site owner decides which one the solver actually runs.
- Should be easiest proof for nf3 e51. Nf3 e5 2. e4proposed by quasa · 16 votes
- Pls nh4 is more solvable than c31. Nf3 f6 2. e4 e6 3. Nc3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. d4 g6 7. Nh4proposed by 67king · 6 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 3 votes
- Let's solve Qc8 in 2N Nh6 mainline and/or use it as a benchmark1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Bg4 11. Bh3 Qc8 12. Bh6proposed by soothdest · 3 votes
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Sep 29 09:37 Solved: WHITE_WIN via MINIMAXview
1. Nh3 f6 2. Nc3 h6 … Rc8 11. Bb2 Nh6 12. Bxf6 Rc6
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 - Sep 29 09:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … Kg8 20. Qe5 axb4 21. Rc8 Ne8
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 13. Qf3 Rc4 14. d4 Rc3 15. Qg3 Rd3 16. cxd3 a5 17. Qg5 Ng4 18. f3 Nf6 19. Rc1 Kg8 20. Qe5 axb4 21. Rc8 Ne8 - Sep 29 09:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … 19. Rc1 Kg8 20. Qe5 axb4 21. Rc8
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 13. Qf3 Rc4 14. d4 Rc3 15. Qg3 Rd3 16. cxd3 a5 17. Qg5 Ng4 18. f3 Nf6 19. Rc1 Kg8 20. Qe5 axb4 21. Rc8 - Sep 29 09:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … Nf6 19. Rc1 Kg8 20. Qe5 axb4
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 13. Qf3 Rc4 14. d4 Rc3 15. Qg3 Rd3 16. cxd3 a5 17. Qg5 Ng4 18. f3 Nf6 19. Rc1 Kg8 20. Qe5 axb4 - Sep 29 09:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … 18. f3 Nf6 19. Rc1 Kg8 20. Qe5
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 13. Qf3 Rc4 14. d4 Rc3 15. Qg3 Rd3 16. cxd3 a5 17. Qg5 Ng4 18. f3 Nf6 19. Rc1 Kg8 20. Qe5 - Sep 29 09:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … Ng4 18. f3 Nf6 19. Rc1 Kg8
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 13. Qf3 Rc4 14. d4 Rc3 15. Qg3 Rd3 16. cxd3 a5 17. Qg5 Ng4 18. f3 Nf6 19. Rc1 Kg8 - Sep 29 09:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … 17. Qg5 Ng4 18. f3 Nf6 19. Rc1
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 13. Qf3 Rc4 14. d4 Rc3 15. Qg3 Rd3 16. cxd3 a5 17. Qg5 Ng4 18. f3 Nf6 19. Rc1 - Sep 29 09:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … a5 17. Qg5 Ng4 18. f3 Nf6
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 13. Qf3 Rc4 14. d4 Rc3 15. Qg3 Rd3 16. cxd3 a5 17. Qg5 Ng4 18. f3 Nf6 - Sep 29 09:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … 16. cxd3 a5 17. Qg5 Ng4 18. f3
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 13. Qf3 Rc4 14. d4 Rc3 15. Qg3 Rd3 16. cxd3 a5 17. Qg5 Ng4 18. f3 - Sep 29 09:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … Rd3 16. cxd3 a5 17. Qg5 Ng4
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 13. Qf3 Rc4 14. d4 Rc3 15. Qg3 Rd3 16. cxd3 a5 17. Qg5 Ng4 - Sep 29 09:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … 15. Qg3 Rd3 16. cxd3 a5 17. Qg5
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 13. Qf3 Rc4 14. d4 Rc3 15. Qg3 Rd3 16. cxd3 a5 17. Qg5 - Sep 29 09:37 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 h6 … Rc3 15. Qg3 Rd3 16. cxd3 a5
1. Nh3 f6 2. Nc3 h6 3. Nd5 e6 4. e3 Na6 5. Nxc7 Bc5 6. Bb5 Kf8 7. b4 Be7 8. Bxa6 h5 9. Nf4 g6 10. h3 Rc8 11. Bb2 Nh6 12. Bxf6 Rc6 13. Qf3 Rc4 14. d4 Rc3 15. Qg3 Rd3 16. cxd3 a5