65.1M
positions
11.6M
practically solved
233.67T
engine nodes
1.8M
analyses
9,074
in queue
10
active workers
64
active cores
8.8M
nodes / sec
18.9
positions / min
125
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 269,633 closures, 3.40T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 192 open obligations, of which 30 (15.6%) 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 23.2m (median of 122) · measured at 2026-09-28 03:00 UTC
Closures by source, last 24h (269633 of 269633 labelled): USER 99.4% (267916) · FILL 0.2% (477) · AUTO 0.4% (1085) · SOLVE 0.0% (0) · NONE 0.1% (155) · last 7d (1355306 of 1355306): USER 96.9% (1312690) · FILL 0.6% (8795) · AUTO 2.4% (32065) · SOLVE 0.0% (0) · NONE 0.1% (1756). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 e6 2. e3 g6 … 21. g4 Rg8 22. g5 Ng6 23. Kg2 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 21. g4 Rg8 22. g5 Ng6 23. Rg3 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kf8 12. c4 bxc4 13. Na3 d5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kf8 12. c4 bxc4 13. Na3 Ke8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Kf8 12. c4 bxc4 13. Na3 Kg8 (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 | 1002 | 2 | |
| g1h3 | unsolved | 810 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 183 | 2 | |
| c2c3 | unsolved | 19 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -100 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| f2f3 | unsolved | -110 | 2 | |
| 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 | BManBJ 38.6% of the fleet | 1.31T | 9,460 |
| 2 | auranvesdranor 25.9% of the fleet | 879.48B | 6,223 |
| 3 | randomchampgamer 16.3% of the fleet | 554.86B | 4,361 |
| 4 | tenzink 16.2% of the fleet | 550.41B | 3,519 |
| 5 | MoNiKaMaDnEsS 2.4% of the fleet | 80.69B | 569 |
| 6 | soothdest 0.5% of the fleet | 17.08B | 132 |
| 7 | rhaxier <0.1% of the fleet | 1.66B | 13 |
| 8 | bricerichmond <0.1% of the fleet | 700.3M | 6 |
8 accounts · 3.40T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.6% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.50T | 305,995 |
| 3 | BManBJ 11.6% of the fleet | 27.03T | 186,001 |
| 4 | auranvesdranor 11.3% of the fleet | 26.48T | 190,455 |
| 5 | JackIV 4.3% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.0% of the fleet | 9.29T | 67,567 |
| 7 | RickEdinson 2.8% of the fleet | 6.50T | 43,070 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.14T | 26,565 |
| 9 | NeoArcturus 1.7% of the fleet | 4.09T | 16,756 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 23 more.
33 accounts · 233.68T 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 28 03:11 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 g6 … Kf7 9. Be8 Kg8 10. Bxg6 Kh7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. Be8 Kg8 10. Bxg6 Kh7 - Sep 28 03:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 9. Be8 Kg8 10. Bxg6 Kh7 11. g4
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. Be8 Kg8 10. Bxg6 Kh7 11. g4 - Sep 28 03:11 MATE_RECERTIFIEDview
1. Nf3 f6 2. e4 e6 … Ka7 29. R8c7 Kb8 30. Ra7 Rg8
1. Nf3 f6 2. e4 e6 3. Nc3 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 Kd8 13. f6 g5 14. h3 d6 15. g4 b6 16. h4 Ba6 17. Bxa6 Rc8 18. Rc1 Kc7 19. f7 Kb8 20. h5 Ne7 21. c4 a5 22. a3 a4 23. c5 Rc6 24. cxd6 b5 25. O-O e5 26. Rc8 Kb7 27. Rfc1 Bc5 28. dxc5 Ka7 29. R8c7 Kb8 30. Ra7 Rg8 - Sep 28 03:11 MATE_RECERTIFIEDview
1. Nf3 f6 2. Nc3 g6 … h3 18. g3 g5 19. Qf8 Kh7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. d4 Bg7 10. c4 f5 11. O-O Bf6 12. e4 Rg8 13. Bd7 Kg7 14. Bh6 Kh8 15. exf5 Rf8 16. Bxf8 h4 17. Qf3 h3 18. g3 g5 19. Qf8 Kh7 - Sep 28 03:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Bh6 13. Qh5 Kh8 14. Qf7 Bxe3
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. Be8 Kg8 10. Bxg6 f5 11. g4 Kh7 12. gxh5 Bh6 13. Qh5 Kh8 14. Qf7 Bxe3 - Sep 28 03:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 12. gxh5 Bh6 13. Qh5 Kh8 14. Qf7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. Be8 Kg8 10. Bxg6 f5 11. g4 Kh7 12. gxh5 Bh6 13. Qh5 Kh8 14. Qf7 - Sep 28 03:11 MATE_RECERTIFIEDview
1. d4 c6 2. Nc3 f6 … Kf7 23. Rf8 Kg7 24. Qe7 Kg6
1. d4 c6 2. Nc3 f6 3. Nf3 e6 4. g4 Nh6 5. e4 f5 6. exf5 d5 7. Bd3 Qg5 8. Nxg5 Nd7 9. Qf3 Nf6 10. Bg6 Kd8 11. Be8 b6 12. Qe2 Bd6 13. Nxd5 Ne4 14. f3 Ba6 15. c4 g5 16. fxe4 Rf8 17. Bf7 Rxf7 18. O-O e5 19. Rf8 Ke7 20. Re8 Kd7 21. Rd8 Ke7 22. dxe5 Kf7 23. Rf8 Kg7 24. Qe7 Kg6 - Sep 28 03:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Kh7 12. gxh5 Bh6 13. Qh5 Kh8
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. Be8 Kg8 10. Bxg6 f5 11. g4 Kh7 12. gxh5 Bh6 13. Qh5 Kh8 - Sep 28 03:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 11. g4 Kh7 12. gxh5 Bh6 13. Qh5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. Be8 Kg8 10. Bxg6 f5 11. g4 Kh7 12. gxh5 Bh6 13. Qh5 - Sep 28 03:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … f5 11. g4 Kh7 12. gxh5 Bh6
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. Be8 Kg8 10. Bxg6 f5 11. g4 Kh7 12. gxh5 Bh6 - Sep 28 03:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … 10. Bxg6 f5 11. g4 Kh7 12. gxh5
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. Be8 Kg8 10. Bxg6 f5 11. g4 Kh7 12. gxh5 - Sep 28 03:11 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 g6 … Kg8 10. Bxg6 f5 11. g4 Kh7
1. Nf3 f6 2. Nc3 g6 3. Nd5 e6 4. Nxc7 d6 5. Ng5 h6 6. Nh7 Rxh7 7. e3 h5 8. Bb5 Kf7 9. Be8 Kg8 10. Bxg6 f5 11. g4 Kh7