104.4M
positions
22.2M
practically solved
385.81T
engine nodes
2.9M
analyses
297
in queue
active workers
92
active cores
71.3M
nodes / sec
30.5
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.3% of tree positions solved · last 24h: 122,556 closures, 2.58T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 201 open obligations, of which 37 (18.4%) 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 6.3m (median of 43) · measured at 2026-11-01 05:00 UTC
Closures by source, last 24h (122556 of 122556 labelled): USER 99.8% (122290) · FILL 0.2% (231) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (35) · last 7d (1252666 of 1252666): USER 97.9% (1226414) · FILL 0.8% (9572) · AUTO 1.3% (16193) · SOLVE 0.0% (0) · NONE 0.0% (487). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing all workers
- 1. Nf3 f6 2. Nd4 Nc6 … Kf8 11. g3 h5 12. h3 e5 (User) · 128.0M nodes · acornwood
- 1. e4 d6 2. Nh3 f5 … Nf6 13. Qc3 Kf7 14. g4 Nd5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. e4 d6 2. Nh3 f5 … Nf6 13. Qc3 Kf7 14. g4 Bg7 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. e4 d6 2. Nh3 f5 … Nf6 13. Qc3 Kf7 14. g4 e6 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nd4 Nc6 … h5 12. h3 e5 13. f4 e4 (User) · 128.0M nodes · moonbeam
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 | 1107 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 437 | 3 | |
| e2e4 | unsolved | 410 | 2 | |
| d2d4 | unsolved | 405 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -59 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -260 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -514 | 2 | |
| g2g4 | unsolved | -604 | 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 | BManBJ 63.6% of the fleet | 1.64T | 6,542 |
| 2 | RickEdinson 17.4% of the fleet | 447.54B | 3,017 |
| 3 | gannet 12.0% of the fleet | 308.58B | 2,395 |
| 4 | MoNiKaMaDnEsS 6.6% of the fleet | 170.89B | 1,101 |
| 5 | soothdest 0.4% of the fleet | 10.22B | 64 |
5 accounts · 2.58T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.5% of the fleet | 78.95T | 532,187 |
| 3 | Torom 13.1% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.1% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.1% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.5% of the fleet | 21.32T | 139,808 |
| 7 | randomchampgamer 5.1% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.2% of the fleet | 12.54T | 86,740 |
| 9 | JackIV 2.6% of the fleet | 10.06T | 67,859 |
| 10 | gannet 2.0% of the fleet | 7.54T | 49,243 |
and 25 more.
35 accounts · 386.04T 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 · 18 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 5 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 4 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 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
Showing the 6 most voted of 23 proposals · see every proposal
Milestones
- Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Bxb3 20. Kd2 d3 21. Ke1 d2
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 Rb8 19. Rb3 Bxb3 20. Kd2 d3 21. Ke1 d2 - Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 19. Rb3 Bxb3 20. Kd2 d3 21. Ke1
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 Rb8 19. Rb3 Bxb3 20. Kd2 d3 21. Ke1 - Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Rb8 19. Rb3 Bxb3 20. Kd2 d3
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 Rb8 19. Rb3 Bxb3 20. Kd2 d3 - Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 18. Re3 Rb8 19. Rb3 Bxb3 20. Kd2
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 Rb8 19. Rb3 Bxb3 20. Kd2 - Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Kf8 18. Re3 Rb8 19. Rb3 Bxb3
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 Rb8 19. Rb3 Bxb3 - Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 17. Bg6 Kf8 18. Re3 Rb8 19. Rb3
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 Rb8 19. Rb3 - Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … f4 17. Bg6 Kf8 18. Re3 Rb8
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 Rb8 - Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 16. Rhe1 f4 17. Bg6 Kf8 18. Re3
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 - Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 27. Kg1 Re1 28. Kh2 Rh1 29. Kg3
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 Rb8 19. Rb3 Bxb3 20. Kd2 d3 21. Ke1 d2 22. Kf1 Rb1 23. c3 Rxd1 24. Bc2 Rh5 25. g4 Re5 26. h4 f3 27. Kg1 Re1 28. Kh2 Rh1 29. Kg3 - Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … f3 27. Kg1 Re1 28. Kh2 Rh1
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 Rb8 19. Rb3 Bxb3 20. Kd2 d3 21. Ke1 d2 22. Kf1 Rb1 23. c3 Rxd1 24. Bc2 Rh5 25. g4 Re5 26. h4 f3 27. Kg1 Re1 28. Kh2 Rh1 - Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 26. h4 f3 27. Kg1 Re1 28. Kh2
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 Rb8 19. Rb3 Bxb3 20. Kd2 d3 21. Ke1 d2 22. Kf1 Rb1 23. c3 Rxd1 24. Bc2 Rh5 25. g4 Re5 26. h4 f3 27. Kg1 Re1 28. Kh2 - Nov 01 05:59 Solved: BLACK_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Re5 26. h4 f3 27. Kg1 Re1
1. Nh3 d5 2. Nc3 h6 3. d4 b5 4. Qd3 e5 5. Bg5 hxg5 6. Ng5 f5 7. dxe5 d4 8. O-O-O Ba3 9. bxa3 Nf6 10. Nf7 Qd6 11. Nxd6 Ng4 12. e3 Na6 13. Nxb5 Nxe3 14. Bb5 c6 15. Bd3 Be6 16. Rhe1 f4 17. Bg6 Kf8 18. Re3 Rb8 19. Rb3 Bxb3 20. Kd2 d3 21. Ke1 d2 22. Kf1 Rb1 23. c3 Rxd1 24. Bc2 Rh5 25. g4 Re5 26. h4 f3 27. Kg1 Re1