104.4M
positions
22.2M
practically solved
385.81T
engine nodes
2.9M
analyses
394
in queue
active workers
92
active cores
73.0M
nodes / sec
28.9
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.3% of tree positions solved · last 24h: 122,920 closures, 2.55T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 201 open obligations, of which 37 (18.4%) 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 6.3m (median of 43) · measured at 2026-11-01 05:00 UTC
Closures by source, last 24h (122920 of 122920 labelled): USER 99.8% (122655) · FILL 0.2% (231) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (34) · last 7d (1252283 of 1252283): USER 97.9% (1226032) · FILL 0.8% (9572) · AUTO 1.3% (16193) · SOLVE 0.0% (0) · NONE 0.0% (486). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing all workers
- 1. Nf3 f6 2. e4 e6 … 11. a4 h5 12. g3 Be7 13. Qd5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 f6 2. e4 e6 … 13. b4 g4 14. h4 Rxa2 15. c4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … 11. a4 h5 12. g3 Be7 13. Ne5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Qc5 11. a4 Qxc4 12. Nh4 h5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nd4 Nc6 … a6 11. Nc3 Bb4 12. Bb5 Kf7 (User) · 128.0M nodes · moonbeam
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 | 1107 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 437 | 3 | |
| e2e4 | unsolved | 410 | 2 | |
| d2d4 | unsolved | 405 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -59 | 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 | BManBJ 64.5% of the fleet | 1.64T | 6,534 |
| 2 | RickEdinson 17.6% of the fleet | 446.90B | 3,012 |
| 3 | gannet 10.5% of the fleet | 267.75B | 2,076 |
| 4 | MoNiKaMaDnEsS 7.1% of the fleet | 179.49B | 1,154 |
| 5 | soothdest 0.4% of the fleet | 10.22B | 64 |
5 accounts · 2.55T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.4% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.4% of the fleet | 78.93T | 532,081 |
| 3 | Torom 13.1% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.1% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.1% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.5% of the fleet | 21.32T | 139,773 |
| 7 | randomchampgamer 5.1% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.2% of the fleet | 12.54T | 86,740 |
| 9 | JackIV 2.6% of the fleet | 10.06T | 67,859 |
| 10 | gannet 1.9% of the fleet | 7.50T | 48,924 |
and 25 more.
35 accounts · 385.98T 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 · 18 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 23 proposals · see every proposal
Milestones
- Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … g6 11. O-O-O Bg7 12. Qe4 Qe7
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Qd3 b5 5. Bf4 c5 6. Qd2 e5 7. Bg5 hxg5 8. Ng5 f5 9. dxe5 f4 10. Qd3 g6 11. O-O-O Bg7 12. Qe4 Qe7 - Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … g6 11. O-O-O Bg7 12. Qe4 Kf8
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Qd3 b5 5. Bf4 c5 6. Qd2 e5 7. Bg5 hxg5 8. Ng5 f5 9. dxe5 f4 10. Qd3 g6 11. O-O-O Bg7 12. Qe4 Kf8 - Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … Bg7 12. Qe4 Kd7 13. Qe8 Kc7
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Qd3 b5 5. Bf4 c5 6. Qd2 e5 7. Bg5 hxg5 8. Ng5 f5 9. dxe5 f4 10. Qd3 g6 11. O-O-O Bg7 12. Qe4 Kd7 13. Qe8 Kc7 - Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … 11. O-O-O Bg7 12. Qe4 Kd7 13. Qe8
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Qd3 b5 5. Bf4 c5 6. Qd2 e5 7. Bg5 hxg5 8. Ng5 f5 9. dxe5 f4 10. Qd3 g6 11. O-O-O Bg7 12. Qe4 Kd7 13. Qe8 - Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 d5 2. Nc3 h6 … g6 11. O-O-O Bg7 12. Qe4 Kd7
1. Nh3 d5 2. Nc3 h6 3. d4 e6 4. Qd3 b5 5. Bf4 c5 6. Qd2 e5 7. Bg5 hxg5 8. Ng5 f5 9. dxe5 f4 10. Qd3 g6 11. O-O-O Bg7 12. Qe4 Kd7 - Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … d5 15. Re7 Kf8 16. Re8 Kf7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 axb5 9. Qe2 Qa5 10. Qc4 Qc5 11. a4 h5 12. a5 Bh6 13. a6 bxa6 14. Ra7 d5 15. Re7 Kf8 16. Re8 Kf7 - Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 14. Ra7 d5 15. Re7 Kf8 16. Re8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 axb5 9. Qe2 Qa5 10. Qc4 Qc5 11. a4 h5 12. a5 Bh6 13. a6 bxa6 14. Ra7 d5 15. Re7 Kf8 16. Re8 - Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … bxa6 14. Ra7 d5 15. Re7 Kf8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 axb5 9. Qe2 Qa5 10. Qc4 Qc5 11. a4 h5 12. a5 Bh6 13. a6 bxa6 14. Ra7 d5 15. Re7 Kf8 - Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 13. a6 bxa6 14. Ra7 d5 15. Re7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 axb5 9. Qe2 Qa5 10. Qc4 Qc5 11. a4 h5 12. a5 Bh6 13. a6 bxa6 14. Ra7 d5 15. Re7 - Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Bh6 13. a6 bxa6 14. Ra7 d5
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 axb5 9. Qe2 Qa5 10. Qc4 Qc5 11. a4 h5 12. a5 Bh6 13. a6 bxa6 14. Ra7 d5 - Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … Qxc6 17. Re7 Kf8 18. Re8 Kf7
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 axb5 9. Qe2 Qa5 10. Qc4 Qc5 11. a4 h5 12. a5 Bh6 13. a6 bxa6 14. Ra7 Qc7 15. Qc5 d6 16. Qc6 Qxc6 17. Re7 Kf8 18. Re8 Kf7 - Nov 01 05:46 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 16. Qc6 Qxc6 17. Re7 Kf8 18. Re8
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O g6 7. h3 a6 8. Kh1 axb5 9. Qe2 Qa5 10. Qc4 Qc5 11. a4 h5 12. a5 Bh6 13. a6 bxa6 14. Ra7 Qc7 15. Qc5 d6 16. Qc6 Qxc6 17. Re7 Kf8 18. Re8