Results

Puzzles

The share of Lichess puzzles that the engine solves under each limit.

Puzzles


20,000 nodesverified - 1,000,000 puzzles	93.3%93.3% to 93.4%	2466	25,445	nodes 20000
20,000 nodes, 200,000 puzzles (base of the techniques)verified - 200,000 puzzles	93.4%93.3% to 93.5%	2468	25,458	nodes 20000
50 ms per moveverified - 1,000,000 puzzles	96.2%96.1% to 96.2%	2633	87,336	movetime 50
Depth 6verified - 1,000,000 puzzles	92.8%92.7% to 92.8%	2440	11,086	depth 6

Run details

Every result has a run. A run records the engine commit and the hash of the binary, the machine, the settings, the data that it used, the commit of this framework, and the conditions when it ran. Select a run in a table to open its details.

20,000 nodessolved 93.3%

Result
Solved	93.3% (93.3% to 93.4%)
First move	95.7%
Puzzle rating	2466
Mean nodes	25,445
Puzzles	1,000,000
Limit	nodes 20000
Run
Run	20261018T152925Z-puzzles-1d60cea0
Protocol	puzzles version 2
Grade	verified Made from a clean state.
Started	2026-10-18T15:29:25Z
Limits	items: 1000000 limit: {'nodes': 20000} options: {'Hash': 16, 'Threads': 1} workers: 28
Engine
Commit	1851d6012c88
Binary	7f83e651ee5e45a40d59fa69de6af48ca6f62c56aa0a31c0e30a561213eb9b9a
Name	Meridian 1.0.0
Data
Dataset	lichess-puzzles-sample 506b1f835374
Machine
CPU	13th Gen Intel(R) Core(TM) i9-13900HX, 32 logical CPUs
Kernel	7.0.0-38-generic
Framework
Commit	a0b7d32da5aa
State	clean
Conditions
Power source	ac
Governor	powersave
Load at start	1.74365234375

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20,000 nodes, 200,000 puzzles (base of the techniques)solved 93.4%

Result
Solved	93.4% (93.3% to 93.5%)
First move	95.8%
Puzzle rating	2468
Mean nodes	25,458
Puzzles	200,000
Limit	nodes 20000
Run
Run	20261018T194649Z-puzzles-65e441ed
Protocol	puzzles version 2
Grade	verified Made from a clean state.
Started	2026-10-18T19:46:49Z
Limits	items: 200000 limit: {'nodes': 20000} options: {'Hash': 16, 'Threads': 1} workers: 28
Engine
Commit	1851d6012c88
Binary	7f83e651ee5e45a40d59fa69de6af48ca6f62c56aa0a31c0e30a561213eb9b9a
Name	Meridian 1.0.0
Data
Dataset	lichess-puzzles-sample 506b1f835374
Machine
CPU	13th Gen Intel(R) Core(TM) i9-13900HX, 32 logical CPUs
Kernel	7.0.0-38-generic
Framework
Commit	4b41d6414940
State	clean
Conditions
Power source	ac
Governor	powersave
Load at start	4.85888671875

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50 ms per movesolved 96.2%

Result
Solved	96.2% (96.1% to 96.2%)
First move	97.6%
Puzzle rating	2633
Mean nodes	87,336
Puzzles	1,000,000
Limit	movetime 50
Run
Run	20261018T173114Z-puzzles-7a3c11c3
Protocol	puzzles version 2
Grade	verified Made from a clean state.
Started	2026-10-18T17:31:14Z
Limits	items: 1000000 limit: {'movetime': 50} options: {'Hash': 16, 'MoveOverhead': 0, 'Threads': 1} workers: 16
Engine
Commit	1851d6012c88
Binary	7f83e651ee5e45a40d59fa69de6af48ca6f62c56aa0a31c0e30a561213eb9b9a
Name	Meridian 1.0.0
Data
Dataset	lichess-puzzles-sample 506b1f835374
Machine
CPU	13th Gen Intel(R) Core(TM) i9-13900HX, 32 logical CPUs
Kernel	7.0.0-38-generic
Framework
Commit	4b41d6414940
State	clean
Conditions
Power source	ac
Governor	powersave
Load at start	0.74267578125

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Depth 6solved 92.8%

Result
Solved	92.8% (92.7% to 92.8%)
First move	95.6%
Puzzle rating	2440
Mean nodes	11,086
Puzzles	1,000,000
Limit	depth 6
Run
Run	20261018T160546Z-puzzles-5a108ba8
Protocol	puzzles version 2
Grade	verified Made from a clean state.
Started	2026-10-18T16:05:46Z
Limits	items: 1000000 limit: {'depth': 6} options: {'Hash': 16, 'Threads': 1} workers: 28
Engine
Commit	1851d6012c88
Binary	7f83e651ee5e45a40d59fa69de6af48ca6f62c56aa0a31c0e30a561213eb9b9a
Name	Meridian 1.0.0
Data
Dataset	lichess-puzzles-sample 506b1f835374
Machine
CPU	13th Gen Intel(R) Core(TM) i9-13900HX, 32 logical CPUs
Kernel	7.0.0-38-generic
Framework
Commit	a0b7d32da5aa
State	clean
Conditions
Power source	ac
Governor	powersave
Load at start	8.6376953125

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