66.1M
positions
11.8M
practically solved
237.42T
engine nodes
1.8M
analyses
5,389
in queue
14
active workers
96
active cores
28.8M
nodes / sec
23.3
positions / min
83
proof number
3,835
disproof number
Root conquest: 0/20 first moves solved · 17.9% of tree positions solved · last 24h: 247,441 closures, 4.51T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 197 open obligations, of which 32 (16.2%) 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 4.5h (median of 34) · measured at 2026-09-28 22:00 UTC
Closures by source, last 24h (247422 of 247422 labelled): USER 99.8% (246838) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (584) · last 7d (1565665 of 1565684): USER 97.2% (1522485) · FILL 0.6% (8795) · AUTO 2.0% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2320). 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 … 14. Be2 g5 15. e4 g4 16. Bh6 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f5 2. e3 e6 … 14. Be2 g5 15. e4 g4 16. Bc1 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 f6 2. e4 e6 … Bf7 19. c3 Nd7 20. b3 a5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f6 … Bc5 11. d4 Rf8 12. dxc5 Rg8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f6 … Bc5 11. d4 Rf8 12. dxc5 Rf7 (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 | 786 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 436 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| 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 | BManBJ 31.5% of the fleet | 1.42T | 10,641 |
| 2 | auranvesdranor 23.5% of the fleet | 1.06T | 8,171 |
| 3 | randomchampgamer 12.9% of the fleet | 580.73B | 4,672 |
| 4 | tenzink 12.4% of the fleet | 559.00B | 3,291 |
| 5 | gannet 10.0% of the fleet | 449.79B | 788 |
| 6 | uipio 7.0% of the fleet | 317.54B | 1,518 |
| 7 | bricerichmond 1.7% of the fleet | 77.47B | 107 |
| 8 | rhaxier 0.8% of the fleet | 34.84B | 197 |
| 9 | soothdest 0.3% of the fleet | 12.60B | 95 |
| 10 | NeoArcturus <0.1% of the fleet | 142.6M | 2 |
10 accounts · 4.52T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.0% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.96T | 308,675 |
| 3 | BManBJ 11.9% of the fleet | 28.18T | 194,616 |
| 4 | auranvesdranor 11.5% of the fleet | 27.34T | 197,062 |
| 5 | JackIV 4.2% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.1% of the fleet | 9.78T | 71,529 |
| 7 | RickEdinson 2.7% of the fleet | 6.50T | 43,070 |
| 8 | MoNiKaMaDnEsS 1.7% of the fleet | 4.14T | 26,565 |
| 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 · 237.53T 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 28 22:38 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nc3 a6 … Bc5 11. c3 Rf8 12. dxc5 e5
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Be7 10. d4 Bc5 11. c3 Rf8 12. dxc5 e5 - Sep 28 22:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Re7 15. Qf8 Re8 16. Qd6 f5
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Be7 10. d4 Bc5 11. c3 Rf8 12. dxc5 e5 13. b4 Re8 14. Qf7 Re7 15. Qf8 Re8 16. Qd6 f5 - Sep 28 22:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 14. Qf7 Re7 15. Qf8 Re8 16. Qd6
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Be7 10. d4 Bc5 11. c3 Rf8 12. dxc5 e5 13. b4 Re8 14. Qf7 Re7 15. Qf8 Re8 16. Qd6 - Sep 28 22:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Re8 14. Qf7 Re7 15. Qf8 Re8
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Be7 10. d4 Bc5 11. c3 Rf8 12. dxc5 e5 13. b4 Re8 14. Qf7 Re7 15. Qf8 Re8 - Sep 28 22:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 13. b4 Re8 14. Qf7 Re7 15. Qf8
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Be7 10. d4 Bc5 11. c3 Rf8 12. dxc5 e5 13. b4 Re8 14. Qf7 Re7 15. Qf8 - Sep 28 22:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … e5 13. b4 Re8 14. Qf7 Re7
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Be7 10. d4 Bc5 11. c3 Rf8 12. dxc5 e5 13. b4 Re8 14. Qf7 Re7 - Sep 28 22:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 12. dxc5 e5 13. b4 Re8 14. Qf7
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Be7 10. d4 Bc5 11. c3 Rf8 12. dxc5 e5 13. b4 Re8 14. Qf7 - Sep 28 22:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Rf8 12. dxc5 e5 13. b4 Re8
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Be7 10. d4 Bc5 11. c3 Rf8 12. dxc5 e5 13. b4 Re8 - Sep 28 22:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 11. c3 Rf8 12. dxc5 e5 13. b4
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Be7 10. d4 Bc5 11. c3 Rf8 12. dxc5 e5 13. b4 - Sep 28 22:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Re6 14. cxd5 Kc7 15. Qd7 Kb8
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Bc5 10. d4 Rf8 11. dxc5 e5 12. c4 Re8 13. Qf5 Re6 14. cxd5 Kc7 15. Qd7 Kb8 - Sep 28 22:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … 13. Qf5 Re6 14. cxd5 Kc7 15. Qd7
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Bc5 10. d4 Rf8 11. dxc5 e5 12. c4 Re8 13. Qf5 Re6 14. cxd5 Kc7 15. Qd7 - Sep 28 22:38 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 a6 … Re8 13. Qf5 Re6 14. cxd5 Kc7
1. Nf3 f6 2. Nc3 a6 3. Ng5 d6 4. Nd5 e6 5. Nxc7 h6 6. Nh7 Rxh7 7. e3 d5 8. Qg4 O-O-O 9. Qg6 Bc5 10. d4 Rf8 11. dxc5 e5 12. c4 Re8 13. Qf5 Re6 14. cxd5 Kc7