Endgame Tablebases Online
6-men endgame analysis free for everyone
  

News

October 25, 2024

11 years after the last update, I thought I should clarify that the project is over and this page is no longer maintained. The project of distributing Nalimov's 6-piece tablebases over the eMule network was successful and has accomplished all its goals. Now both the Nalimov's format and eMule network are no longer widely used. I am keeping this page online purely as a piece of history.

September 27, 2013

Please be sure to verify the downloaded Syzygybases using the following checksums:

These checksums were provided by Joshua Shriver in a single file, I divided them into 4 files for convenience.

Note that md5sum from GnuWin32 Coreutils package computes wrong checksums. You need another build of md5sum, e.g., from Cygwin, or a different checksummer, such as fsum. Simply copy the md5 file into the corresponding Syzygybases directory and run "fsum -c Syzygybases-WDL-3-4-5.md5" (example).

September 14, 2013

Syzygybases is a new promising tablebase format developed by Ronald de Man. The main differences from Nalimov's format:

  • Syzygybases take 50 moves rule into account.
  • Probing code is distributed under permissive license (Nalimov's probing code can only be used under Nalimov's permission, which is hard to impossible to obtain).
  • Syzygybases include WDL (win/draw/loss) tables for fast access during search, as well as separate DTZ (distance to zeroing the 50 move counter) tables for finding the winning line.
  • Syzygybase are about 7 times smaller than Nalimov's tablebases (161 GB vs 1.2 TB).
  • Generating complete syzygybases for up to 6 pieces takes less than a month on a PC with 16 GB or RAM.

The generator source, probing code source and documentation are available on github: https://github.com/syzygy1/tb. As a proof of concept Ronald incorporated the probing code into Stockfish engine: https://github.com/syzygy1/Stockfish.

A few days ago Joshua Shriver started seeding the complete set of 3-4-5-6-piece Syzygybases on bittorrent (as well as hosting the tracker): http://oics.olympuschess.com/tracker/index.php. Already it looks like downloading might be faster than generating, and it will still get faster as more people join.

Still early days, but this could well become the standard tablebase format for the next decade of computer chess.

(Older news are archived here).

Introduction

Many chess enthusiasts would like to do 6-men endgame analysis, but no one wants to host 1 TB of files for download. So we have to help ourselves. This page is an attempt to organize a persistent online availability of the whole set of Nalimov 6-men tablebases. This project depends solely on chess lovers community, it's up to us to choose if we will download any tablebases for free, or if we will have to buy them on DVD from Chessbase etc..

If you are not sure what endgame tablebases are or how to use them, you can learn the basics from Wikipedia or from Aaron Tay's EGTB Guide.

eMule

We use eDonkey and KAD networks, and eMule software for sharing the tablebase files, so if you want to download them you will have to install eMule (or aMule if you use Mac or Linux). If you are new to eMule please take a look at the tutorial, and official help pages. Here you can learn how to set up eMule behind a firewall or router.

Some hints about configuring eMule the best way by our eMule expert Thomas: Thread 1, Thread 2. If you will have any questions or problems, please ask at EGTB forum. Good luck!

Please keep sharing the files after you downloaded them.

3-4-5 men bases

Just in case you don't have them, you should download and install all 3-4-5 men tables before even thinking of using 6-men tables. You can get them from Bob Hyatt, Chesslib Norm Pruitt (also FTP) or Joshua Shriver, but you might as well try using eMule and download them by these links:

6-men endgame tablebases

All files in this section are "emulecollections" - simple text files containing one or several ed2k links. Paste those links into your eMule and it will start trying to download the files.

Smileys show 'spread status' of each tablebase:
bachin stepper motor 424015a work  – Super-shared tablebase – All files have 10 full sources (peers with complete files).
bachin stepper motor 424015a work  – Well-shared tablebase – At least 3 full sources exist.
bachin stepper motor 424015a work  – At least one full source exist - a recently shared base, not spread yet.
bachin stepper motor 424015a work  – Tablebase disappeared from the network. It was available for some while, but now the original releaser disconnected before anyone else could get the files. If you have any sets marked with this smiley, please share them online!
bachin stepper motor 424015a work  – Tablebase was never released yet.
If you notice that some tablebase is spread more, or less, than stated here, please drop me email and I'll update this page.

The download order is completely up to you. A few things that you may consider:
1. It's good to get small bases before trying the big ones. The best start would be KNNKNN and KBBKBB.
2. It's better to get pawnless bases before getting those with pawns, to avoid the possible "incomplete tablebase problem".
3. You will have better experience if you start with bases which are already shared by many people (bachin stepper motor 424015a work and bachin stepper motor 424015a work).
4. You may like to download tablebases by "importance" order, which is based on statistics of occurrance of each ending in real games. Several such lists exist: by Dieter Bürßner, Nelson Hernandez, and Peter Kasinski.
5. You may like to first download tablebases for endgames where longer checkmates are possible.

[ Sorted by piece value: P⇒N⇒B⇒R⇒Q  |  Sorted by alphabet: B⇒N⇒P⇒Q⇒R ]

4+2 without pawns

  • All –  80 sets, 110 GB in 164 files (tbs | md5)

4+2 with pawns

  • All –  95 sets, 512 GB in 1234 files (tbs | md5)

3+3 without pawns

  • All –  55 sets, 95 GB in 130 files (tbs | md5)

3+3 with pawns

  • All –  65 sets, 429 GB in 984 files (tbs | md5)

Motor 424015a Work - Bachin Stepper

Bachin Stepper Motor 424015A high-performance NEMA 17 bipolar stepper motor frequently used in precision automation equipment like 3D printers (e.g., Creality Ender and CR-10 series) and CNC machines

. It operates by converting electrical pulses into discrete mechanical steps, allowing for highly accurate positioning without a feedback loop. Core Specifications Model Type 42-40 (NEMA 17) Step Angle 1.8 raised to the composed with power per step (200 steps per full 360 raised to the composed with power Phase/Wiring 2-Phase / 4-Wire Bipolar Max Current ~1.0A (Recommended VREF ~1.38V) Holding Torque Approx. 0.4 N.M Shaft Shape Often features a "D" shaft for secure gear/pulley mounting How It Works Pulse Conversion stepper driver

sends rapid bursts of electricity (pulses) to the motor's internal coils. Magnetic Interaction

: Each pulse energizes a pair of stator coils, creating a magnetic field that attracts the rotor's magnetized teeth, pulling it exactly 1.8 raised to the composed with power Position Holding

: Unlike standard DC motors, the 424015A maintains its position when the current stops, using "holding torque" to prevent unwanted movement. Microstepping : Most drivers used with this motor (like those found in Creality 3D printers

) progressively change current levels to allow for "micro-steps," making the motion smoother and quieter than full steps. Typical Applications

Stepper Motor Working Principle: Pulse-Driven Rotation Explained

Title: The Silent Giant: Understanding the Bachin 424015A Stepper Motor

In the burgeoning world of DIY CNC machines, automated camera sliders, and desktop robotics, the NEMA 17 stepper motor is the undisputed king. It is the engine of the maker movement. But within the vast sea of generic silver canisters, specific model numbers stand out for their reliability and torque. One such workhorse is the Bachin 424015A.

While it may look like just another metal brick to the uninitiated, the 424015A represents a specific balance of physics and engineering that makes it ideal for precision movement. Let’s take a closer look at what makes this motor tick—and why it might be the missing link in your next project.

Where you might find related technical information:

Since no direct paper exists, you can find relevant technical information by searching for documents on stepper motor control that apply to this type of motor (NEMA 17, bipolar, 4-wire). Useful search terms include:

While "Bachin" is a specific brand, these motors follow the standard NEMA 17 42-40 form factor (42mm flange, 40mm body length). Step Angle: 1.8∘1.8 raised to the composed with power (200 steps per revolution).

Rated Current: Typically 1.0A to 1.5A per phase. For similar 42-40 models, 1A is standard for safe operation.

Holding Torque: Approximately 40-45 N·cm (56-64 oz·in), depending on the specific internal winding.

Shaft Type: Usually a D-shaft for better grip on pulleys or couplers. Phase Resistance: Typically around 2. Wiring Guide bachin stepper motor 424015a work

This is a 4-wire bipolar stepper motor. To connect it to a driver like an A4988 or DRV8825, you must identify the two coil pairs. Coil Identification: Phase A: Usually Black and Green wires. Phase B: Usually Red and Blue wires.

Testing for Pairs: If your wire colors differ, use a multimeter to check for continuity. Two wires that show low resistance (e.g., ) belong to the same coil.

Direction Control: If the motor spins in the wrong direction, simply swap the wires of one phase (e.g., swap the Black and Green wires). STEPPING MOTOR 103-H5210-4240 Flange size 42 mm. Nema 17

Bachin Stepper Motor 424015A is a compact, high-precision hybrid stepping motor frequently used in DIY desktop CNC machines and laser engravers. It operates on the principle of converting digital electrical pulses into discrete mechanical shaft rotations, allowing for precise open-loop position control without the need for expensive feedback sensors. eu.aspina-group.com Key Specifications & Features The "42" in its designation typically refers to its

frame size (42mm x 42mm), making it a standard choice for 3D printers and small-scale robotics. www.rta.it Precise Increments : As a standard stepper, it typically moves in steps of 1.8 raised to the composed with power

(200 steps per revolution), though it can be micro-stepped by a driver for even finer resolution. Holding Torque

: It is designed to provide high torque at low speeds, which is essential for maintaining the position of a laser head or cutting tool during operation. Open-Loop Control

: Position control is achieved by tracking the number of input pulses; the rotation angle is directly proportional to the pulse count. eu.aspina-group.com Internal Mechanics and Operation

The motor works through the interaction between a permanent magnet rotor and electromagnetic stator coils. iarduino.ru Pulse Reception

: A stepper driver receives signals from a controller (like an Arduino or Bachin board). Sequential Energization

: The driver energizes specific stator coils in a sequence. This creates a magnetic field that pulls the rotor to align with the active stator teeth. Step Movement

: Each change in the coil's energization state moves the motor exactly one "step." forum.arduino.cc Typical Wiring Configuration This motor is commonly a 4-wire bipolar setup, which requires a H-bridge driver. : Usually represented by Red and Blue (or Black) wires. : Usually represented by Green and Black (or Yellow) wires. Reversing Direction

: If the motor spins the wrong way, you can simply reverse the polarity of one pair (e.g., swap the wires of Coil A). forum.arduino.cc Common Use Cases Laser Engravers : Moving the X and Y axes with high repeatability. 3D Printers : Driving the filament extruder or moving the print bed. Desktop CNCs : Precision milling of soft materials like wood or plastic. or a guide on how to tune the current for this motor? STEPPING MOTOR 103-H5210-4240 - rtA.it

Cable & Connector Quality (Mixed)

Decoding the "424015a" Work Cycle

So, how does the Bachin stepper motor 424015a execute a work cycle? It relies on a specific sequence called "wave drive" or "full-step" mode. "Stepper motor NEMA 17 control" + PDF "Bipolar

Where to find exact datasheet

Confirm all electrical/mechanical ratings, torque curves, and wiring diagrams with the official Bachin 424015A datasheet or vendor specifications before final integration.

If you want, I can convert this into a one-page datasheet, a quick-start wiring diagram with recommended driver part numbers, or a shopping/spec-comparison table — tell me which.

(Invoking related search term suggestions now.)

The Bachin 424015A is a standard NEMA 17 hybrid bipolar stepper motor commonly used in 3D printers, laser engravers (like Bachinmaker kits), and small CNC machines. It operates by converting electrical pulses into discrete mechanical movements, allowing for precise control of position and speed without a feedback loop. Technical Specifications

Based on the standard 42-40 motor profile (which the 424015A model represents), here are the typical specifications for this motor: Step Angle: 1.8∘1.8 raised to the composed with power (200 steps per full 360∘360 raised to the composed with power revolution).

Rated Current: Typically 1.5A per phase (sometimes specified as 1.2A depending on the specific batch). Holding Torque: Approximately Ncm (

oz-in), providing enough force for medium-sized desktop axes. Frame Size: (NEMA 17) with a body length of

Shaft: Usually a 5 mm "D-cut" shaft to prevent gear or pulley slippage. How It Works

The motor operates on the principle of sequential electromagnetism: The Best Applications for Stepper Motors | A3

Understanding the Bachin Stepper Motor 424015A: A Comprehensive Guide to Its Work and Applications

In the realm of industrial automation and robotics, stepper motors have become an essential component for precise motion control. Among the numerous stepper motor manufacturers, Bachin has established itself as a reputable brand, offering a wide range of high-quality motors. One such motor is the Bachin Stepper Motor 424015A, which has gained popularity for its reliability and performance. In this article, we will delve into the inner workings of the Bachin Stepper Motor 424015A, exploring its features, applications, and benefits.

What is a Stepper Motor?

A stepper motor is an electric motor that rotates in small, discrete steps, allowing for precise control over its position, speed, and torque. Unlike traditional DC motors, stepper motors do not require a continuous power supply, instead, they move in response to electrical pulses sent to their windings. This unique characteristic makes stepper motors ideal for applications requiring precise positioning, such as 3D printing, CNC machining, and robotics.

Bachin Stepper Motor 424015A: Overview

The Bachin Stepper Motor 424015A is a high-performance motor designed for demanding applications. Its compact size, high torque, and precise positioning capabilities make it a popular choice among engineers and designers. Here are some key specifications of the Bachin Stepper Motor 424015A:

How Does the Bachin Stepper Motor 424015A Work?

The Bachin Stepper Motor 424015A operates on the principle of electromagnetic induction. The motor consists of a stator, rotor, and windings. When an electrical pulse is applied to the windings, a magnetic field is generated, attracting the rotor and causing it to move in a specific direction. The rotor is designed with a series of teeth, which interact with the stator's teeth to create a precise, incremental motion.

The motor's operation can be divided into several steps:

  1. Step 1: An electrical pulse is applied to the windings, generating a magnetic field.
  2. Step 2: The rotor aligns itself with the stator's teeth, creating a precise position.
  3. Step 3: The electrical pulse is removed, and the rotor remains in its new position.
  4. Step 4: The process is repeated, moving the rotor to the next position.

Applications of the Bachin Stepper Motor 424015A

The Bachin Stepper Motor 424015A is suitable for a wide range of applications, including:

  1. 3D Printing: The motor's precise positioning and high torque make it ideal for 3D printing applications, ensuring accurate and smooth motion.
  2. CNC Machining: The motor's high precision and reliability make it suitable for CNC machining applications, such as milling, drilling, and engraving.
  3. Robotics: The motor's compact size and high torque make it a popular choice for robotic applications, such as robotic arms and grippers.
  4. Medical Devices: The motor's precision and reliability make it suitable for medical devices, such as medical pumps and diagnostic equipment.

Benefits of the Bachin Stepper Motor 424015A

The Bachin Stepper Motor 424015A offers several benefits, including:

  1. High Precision: The motor's precise positioning and high torque ensure accurate and smooth motion.
  2. Reliability: The motor's robust design and high-quality materials ensure a long lifespan and minimal maintenance.
  3. Compact Size: The motor's compact size makes it ideal for applications where space is limited.
  4. Energy Efficiency: The motor's low power consumption makes it an energy-efficient solution.

Conclusion

The Bachin Stepper Motor 424015A is a high-performance motor designed for demanding applications. Its precise positioning, high torque, and compact size make it a popular choice among engineers and designers. With its robust design and high-quality materials, the motor ensures a long lifespan and minimal maintenance. Whether you're working on a 3D printing project, CNC machining application, or robotics project, the Bachin Stepper Motor 424015A is a reliable and efficient solution.

FAQs

  1. What is the step angle of the Bachin Stepper Motor 424015A? The step angle of the Bachin Stepper Motor 424015A is 1.8° (200 steps per revolution).
  2. What is the holding torque of the Bachin Stepper Motor 424015A? The holding torque of the Bachin Stepper Motor 424015A is 4.2 Ncm (5.9 oz-in).
  3. What is the rated current of the Bachin Stepper Motor 424015A? The rated current of the Bachin Stepper Motor 424015A is 1.5 A.

By understanding the Bachin Stepper Motor 424015A and its applications, engineers and designers can create innovative solutions that require precise motion control. Whether you're a seasoned professional or just starting out, this comprehensive guide has provided you with a deeper understanding of the Bachin Stepper Motor 424015A and its capabilities.

Here’s a detailed, balanced review of the Bachin 424015A Stepper Motor, based on typical user experiences and technical specifications for this class of NEMA 17-style motor.

Cons ❌

© 2005-2013 Kirill Kryukov
This page is available under the CC BY 3.0 License