73.0M
positions
13.6M
practically solved
261.02T
engine nodes
2.0M
analyses
11,738
in queue
14
active workers
85
active cores
6.8M
nodes / sec
24.7
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.6% of tree positions solved · last 24h: 344,590 closures, 4.30T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 78 over 201 open obligations, of which 33 (16.4%) 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 2.5h (median of 111) · measured at 2026-10-02 18:00 UTC
Closures by source, last 24h (344507 of 344542 labelled): USER 99.7% (343403) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.3% (1104) · last 7d (2918190 of 2918238): USER 98.4% (2872957) · FILL 0.3% (8795) · AUTO 1.1% (32065) · SOLVE 0.0% (0) · NONE 0.1% (4373). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f5 2. e3 e6 … a5 10. h3 Kh8 11. Bxc6 Ra7 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f5 2. e3 e6 … a5 10. h3 Kh8 11. Bxc6 Rad8 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nh3 f5 2. e3 e6 … a5 10. h3 Kh8 11. Bxc6 Rab8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Ne5 fxe5 … 24. a4 Bc2 25. f4 g4 26. Bxd6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. Ne5 fxe5 … 24. Be7 Bd1 25. a4 g5 26. f5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-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 | 1101 | 2 | |
| g1h3 | unsolved | 725 | 2 | |
| e2e3 | unsolved | 488 | 3 | |
| d2d4 | unsolved | 439 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 121 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -305 | 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 34.8% of the fleet | 1.50T | 11,596 |
| 2 | auranvesdranor 23.1% of the fleet | 990.69B | 7,607 |
| 3 | tenzink 14.7% of the fleet | 633.40B | 4,708 |
| 4 | randomchampgamer 14.5% of the fleet | 624.62B | 4,870 |
| 5 | RickEdinson 10.3% of the fleet | 441.58B | 3,277 |
| 6 | MoNiKaMaDnEsS 2.5% of the fleet | 105.86B | 829 |
| 7 | soothdest 0.1% of the fleet | 5.48B | 51 |
| 8 | quasa <0.1% of the fleet | 384.0M | 3 |
8 accounts · 4.30T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 34.6% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.0% of the fleet | 39.29T | 325,443 |
| 3 | BManBJ 13.0% of the fleet | 33.83T | 238,144 |
| 4 | auranvesdranor 12.0% of the fleet | 31.27T | 227,046 |
| 5 | randomchampgamer 4.6% of the fleet | 12.12T | 90,190 |
| 6 | JackIV 3.9% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.0% of the fleet | 7.90T | 52,905 |
| 8 | gannet 2.8% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.17T | 34,516 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 261.17T 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 4 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
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Oct 02 18:53 Solved: WHITE_WIN via MINIMAXview
1. Na3 e5 2. Nf3 Qg5 … d5 8. Ra6 Bd6 9. Rc6 h6
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 - Oct 02 18:53 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Rxb5 15. Re8 exd4 16. Qa4 Kc7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 10. e4 Bc5 11. d4 Bb4 12. c3 f5 13. Rc8 Kd7 14. Bb5 Rxb5 15. Re8 exd4 16. Qa4 Kc7 - Oct 02 18:53 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 14. Bb5 Rxb5 15. Re8 exd4 16. Qa4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 10. e4 Bc5 11. d4 Bb4 12. c3 f5 13. Rc8 Kd7 14. Bb5 Rxb5 15. Re8 exd4 16. Qa4 - Oct 02 18:53 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Kd7 14. Bb5 Rxb5 15. Re8 exd4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 10. e4 Bc5 11. d4 Bb4 12. c3 f5 13. Rc8 Kd7 14. Bb5 Rxb5 15. Re8 exd4 - Oct 02 18:53 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 13. Rc8 Kd7 14. Bb5 Rxb5 15. Re8
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 10. e4 Bc5 11. d4 Bb4 12. c3 f5 13. Rc8 Kd7 14. Bb5 Rxb5 15. Re8 - Oct 02 18:53 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … f5 13. Rc8 Kd7 14. Bb5 Rxb5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 10. e4 Bc5 11. d4 Bb4 12. c3 f5 13. Rc8 Kd7 14. Bb5 Rxb5 - Oct 02 18:53 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 12. c3 f5 13. Rc8 Kd7 14. Bb5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 10. e4 Bc5 11. d4 Bb4 12. c3 f5 13. Rc8 Kd7 14. Bb5 - Oct 02 18:53 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Bb4 12. c3 f5 13. Rc8 Kd7
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 10. e4 Bc5 11. d4 Bb4 12. c3 f5 13. Rc8 Kd7 - Oct 02 18:53 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 11. d4 Bb4 12. c3 f5 13. Rc8
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 10. e4 Bc5 11. d4 Bb4 12. c3 f5 13. Rc8 - Oct 02 18:53 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … Bc5 11. d4 Bb4 12. c3 f5
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 10. e4 Bc5 11. d4 Bb4 12. c3 f5 - Oct 02 18:53 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … 10. e4 Bc5 11. d4 Bb4 12. c3
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 10. e4 Bc5 11. d4 Bb4 12. c3 - Oct 02 18:53 Solved: WHITE_WIN via MATE_PVview
1. Na3 e5 2. Nf3 Qg5 … h6 10. e4 Bc5 11. d4 Bb4
1. Na3 e5 2. Nf3 Qg5 3. Nxg5 d6 4. Nb5 f6 5. Nxc7 b5 6. a4 Rb8 7. axb5 d5 8. Ra6 Bd6 9. Rc6 h6 10. e4 Bc5 11. d4 Bb4