80.4M
positions
15.5M
practically solved
290.89T
engine nodes
2.2M
analyses
3,359
in queue
3
active workers
22
active cores
12.0M
nodes / sec
4.6
positions / min
82
proof number
4,106
disproof number
Root conquest: 0/20 first moves solved · 19.3% of tree positions solved · last 24h: 264,956 closures, 4.48T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 219 open obligations, of which 41 (18.7%) 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 1.5h (median of 21) · measured at 2026-10-10 03:00 UTC
Closures by source, last 24h (264956 of 264956 labelled): USER 100.0% (264912) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (44) · last 7d (1668839 of 1668839): USER 99.0% (1652143) · FILL 0.1% (2071) · AUTO 0.7% (11952) · SOLVE 0.0% (0) · NONE 0.2% (2673). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. e4 e6 … Re8 24. Bxd6 e5 25. c4 Rb8 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … e5 24. Rfe1 Rb8 25. Rac1 Kg8 (User) · 512.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. e4 e6 … 24. Rfe1 Kh7 25. Rac1 Rb8 26. b4 (User) · 128.0M nodes · RickEdinson-MSI-atomicdb
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 | 1094 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 379 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -73 | 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 | Torom 42.1% of the fleet | 1.89T | 12,733 |
| 2 | BManBJ 30.7% of the fleet | 1.38T | 8,572 |
| 3 | randomchampgamer 14.9% of the fleet | 669.12B | 4,559 |
| 4 | RickEdinson 9.9% of the fleet | 441.51B | 2,664 |
| 5 | MoNiKaMaDnEsS 2.4% of the fleet | 107.50B | 662 |
| 6 | soothdest <0.1% of the fleet | 8.0M | 17 |
6 accounts · 4.48T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 31.0% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 15.3% of the fleet | 44.61T | 311,548 |
| 3 | tenzink 14.7% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.9% of the fleet | 17.03T | 124,542 |
| 6 | RickEdinson 3.9% of the fleet | 11.31T | 75,241 |
| 7 | JackIV 3.5% of the fleet | 10.06T | 67,859 |
| 8 | Torom 3.2% of the fleet | 9.26T | 68,482 |
| 9 | gannet 2.5% of the fleet | 7.24T | 46,848 |
| 10 | MoNiKaMaDnEsS 2.2% of the fleet | 6.31T | 42,670 |
and 25 more.
35 accounts · 290.94T 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 · 17 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 22 proposals · see every proposal
Milestones
- Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Ne8 13. Qd2 Rc6 14. Qh6 Kg8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Rc8 10. Nc3 Kf8 11. Bb5 Rc4 12. Bxh6 Ne8 13. Qd2 Rc6 14. Qh6 Kg8 - Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … Rc7 20. Be7 Rxb7 21. Bf8 d5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 e5 8. Ne6 Be7 9. Nxc7 Bd8 10. c3 Ba5 11. Bb5 Kf8 12. dxe5 Bb6 13. f4 Be3 14. Be8 Bd2 15. Kf1 Kg8 16. Qa4 b5 17. Qa6 Rc8 18. Bg6 Rh6 19. Qb7 Rc7 20. Be7 Rxb7 21. Bf8 d5 - Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 f6 2. e4 e6 … Rc8 26. Rf8 Ke6 27. Rf6 Kd7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. d4 Nc6 6. Bb5 h5 7. c3 Nh6 8. Ne5 fxe5 9. Bg5 Qf6 10. f4 Ng4 11. f5 Qxg5 12. Qxh5 g5 13. h3 Bg7 14. fxe6 g4 15. Rf1 Bf6 16. O-O-O gxh3 17. e5 Rh1 18. exf6 d6 19. Rxh1 Kf7 20. Re1 Kg6 21. Re8 b6 22. g3 Bg4 23. Rg8 Kf7 24. Ba6 Na5 25. c4 Rc8 26. Rf8 Ke6 27. Rf6 Kd7 - Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f6 … Bb4 20. O-O Bxd2 21. Qg8 Kg6
1. Nf3 d6 2. Ng5 f6 3. Na3 h6 4. Nb5 e6 5. Nh7 Be7 6. Nxc7 Rxh7 7. e3 f5 8. Bb5 Kf8 9. Bd7 Bd8 10. b3 Bg5 11. Bb2 Kg8 12. Qg4 e5 13. Qc4 d5 14. Qb5 Rf8 15. Ba3 Kh7 16. Bc8 Bh4 17. g3 h5 18. Bxf8 Be7 19. Qe8 Bb4 20. O-O Bxd2 21. Qg8 Kg6 - Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 d6 … e5 18. Rc1 Kf8 19. Rc7 h3
1. Nf3 f6 2. Nc3 d6 3. Nb5 e6 4. Ng5 h6 5. Nh7 Be7 6. Nxc7 Rxh7 7. e3 f5 8. Bb5 Kf8 9. Be8 Kg8 10. c4 h5 11. Bg6 b6 12. Qa4 Rf8 13. Qe8 Kh8 14. Qxe7 h4 15. c5 bxc5 16. b3 Kg8 17. Bb2 e5 18. Rc1 Kf8 19. Rc7 h3 - Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 a6 … g5 20. Q1b4 Kf7 21. Qe7 Kg6
1. Nf3 f6 2. Nc3 a6 3. Ne5 d6 4. Nf7 Qd7 5. Nd5 e6 6. Nxc7 a5 7. e3 b5 8. Nxh8 d5 9. Bxb5 Rb8 10. d4 Bb4 11. c3 Bf8 12. b4 a4 13. b5 h5 14. b6 Ra8 15. Qc2 f5 16. Qb1 Bb4 17. b7 Rd8 18. b8=Q Rc8 19. cxb4 g5 20. Q1b4 Kf7 21. Qe7 Kg6 - Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f6 … Bg5 16. Be3 Bxe3 17. Qe6 Rxe8
1. Nf3 d6 2. Ng5 f6 3. Na3 h6 4. Nb5 e6 5. Nh7 Rxh7 6. Nxc7 f5 7. e4 Be7 8. d4 g6 9. Bb5 Kf8 10. Be8 a6 11. c3 fxe4 12. g3 Kg8 13. Qf3 Kh8 14. d5 e5 15. Qg4 Bg5 16. Be3 Bxe3 17. Qe6 Rxe8 - Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … axb5 16. Qb5 Kg8 17. Qd7 g6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 e5 8. Ne6 Be7 9. Nxc7 Bd8 10. c3 Ba5 11. Bb5 Kf8 12. Bh6 Rxh6 13. exf5 e4 14. f4 a6 15. Qe2 axb5 16. Qb5 Kg8 17. Qd7 g6 - Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nd4 d6 … Rxe8 14. Bf8 Bh6 15. Bg7 Bxe3
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 g6 7. e3 Bg7 8. Bb5 Ke7 9. d4 d5 10. Qf3 Kf8 11. b3 Ne7 12. Ba3 Kg8 13. Be8 Rxe8 14. Bf8 Bh6 15. Bg7 Bxe3 - Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f5 … g4 20. Qd7 Kg6 21. Qh7 Kg5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 a5 11. Bb5 f4 12. h3 e6 13. Qd2 Kg7 14. Bd7 Ne8 15. Nc3 Kf6 16. Qe2 Kg7 17. Qb5 g5 18. e5 Rc8 19. Bxc8 g4 20. Qd7 Kg6 21. Qh7 Kg5 - Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 d6 … Ke8 10. Qc6 Kf7 11. Qd7 Be7
1. Nf3 f6 2. Nc3 d6 3. Nd5 e6 4. Nxc7 Nh6 5. h3 Ng4 6. hxg4 Kf7 7. c3 Rb8 8. Qa4 b5 9. Qe4 Ke8 10. Qc6 Kf7 11. Qd7 Be7 - Oct 10 03:54 MATE_RECERTIFIEDview
1. Nf3 d6 2. Ng5 f6 … Kg8 12. b4 Kh8 13. Qa4 Bd8
1. Nf3 d6 2. Ng5 f6 3. Na3 h6 4. Nb5 e6 5. Nh7 Be7 6. Nxc7 Rxh7 7. e3 h5 8. Bb5 Kf8 9. c4 Rb8 10. Be8 a6 11. Bg6 Kg8 12. b4 Kh8 13. Qa4 Bd8