64.9M
positions
11.6M
practically solved
232.94T
engine nodes
1.8M
analyses
7,411
in queue
10
active workers
64
active cores
22.5M
nodes / sec
18.4
positions / min
125
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 343,470 closures, 3.35T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 191 open obligations, of which 30 (15.7%) 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 2.7m (median of 193) · measured at 2026-09-27 23:00 UTC
Closures by source, last 24h (343470 of 343470 labelled): USER 99.5% (341610) · FILL 0.1% (477) · AUTO 0.3% (1085) · SOLVE 0.0% (0) · NONE 0.1% (298) · last 7d (1322391 of 1322391): USER 96.8% (1279795) · FILL 0.7% (8795) · AUTO 2.4% (32065) · SOLVE 0.0% (0) · NONE 0.1% (1736). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f6 2. Nc3 h6 … 11. b4 f5 12. Bb2 e5 13. a3 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f6 2. Nc3 h6 … 11. b4 f5 12. Bb2 e5 13. d4 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kf8 10. Bxh6 f4 11. h3 Kg8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Kf8 10. Bxh6 f4 11. h3 Ke8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Kf8 10. Bxh6 f4 11. h3 Kg7 (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 | 1025 | 2 | |
| g1h3 | unsolved | 820 | 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 36.1% of the fleet | 1.21T | 8,437 |
| 2 | auranvesdranor 26.5% of the fleet | 885.66B | 5,905 |
| 3 | tenzink 16.9% of the fleet | 567.15B | 3,623 |
| 4 | randomchampgamer 16.9% of the fleet | 566.74B | 4,438 |
| 5 | MoNiKaMaDnEsS 2.9% of the fleet | 98.75B | 664 |
| 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 · 3.35T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.7% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.41T | 305,461 |
| 3 | BManBJ 11.5% of the fleet | 26.79T | 184,220 |
| 4 | auranvesdranor 11.3% of the fleet | 26.30T | 189,063 |
| 5 | JackIV 4.3% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.0% of the fleet | 9.21T | 66,940 |
| 7 | RickEdinson 2.8% of the fleet | 6.50T | 43,070 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.14T | 26,565 |
| 9 | NeoArcturus 1.8% of the fleet | 4.09T | 16,756 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 23 more.
33 accounts · 233.09T 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 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … 7. c3 Qh4 8. g3 Qh5 9. Qf3
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qf3 - Sep 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … 12. f3 exf3 13. Kf2 Qf3 14. Ke1
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qf3 fxg3 10. Nf8 d5 11. Bb5 Nc6 12. f3 exf3 13. Kf2 Qf3 14. Ke1 - Sep 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … Nc6 12. f3 exf3 13. Kf2 Qf3
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qf3 fxg3 10. Nf8 d5 11. Bb5 Nc6 12. f3 exf3 13. Kf2 Qf3 - Sep 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … 11. Bb5 Nc6 12. f3 exf3 13. Kf2
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qf3 fxg3 10. Nf8 d5 11. Bb5 Nc6 12. f3 exf3 13. Kf2 - Sep 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … d5 11. Bb5 Nc6 12. f3 exf3
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qf3 fxg3 10. Nf8 d5 11. Bb5 Nc6 12. f3 exf3 - Sep 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … 10. Nf8 d5 11. Bb5 Nc6 12. f3
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qf3 fxg3 10. Nf8 d5 11. Bb5 Nc6 12. f3 - Sep 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … fxg3 10. Nf8 d5 11. Bb5 Nc6
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qf3 fxg3 10. Nf8 d5 11. Bb5 Nc6 - Sep 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … 9. Qf3 fxg3 10. Nf8 d5 11. Bb5
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qf3 fxg3 10. Nf8 d5 11. Bb5 - Sep 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … Qh5 9. Qf3 fxg3 10. Nf8 d5
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qf3 fxg3 10. Nf8 d5 - Sep 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … 8. g3 Qh5 9. Qf3 fxg3 10. Nf8
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qf3 fxg3 10. Nf8 - Sep 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … Qh4 8. g3 Qh5 9. Qf3 fxg3
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qf3 fxg3 - Sep 27 23:08 Solved: BLACK_WIN via MATE_PVview
1. Nh3 f5 2. d4 h6 … 7. c3 Qh4 8. g3 Qh5 9. Qg4
1. Nh3 f5 2. d4 h6 3. Ng5 e5 4. e3 e4 5. h3 f4 6. Nh7 Bb4 7. c3 Qh4 8. g3 Qh5 9. Qg4