 Item number SCP-1875 Object Class Euclid Next Scheduled November 77 Exercise Cancelled Explanation of recent containment procedure changes We believe that computer networks at SCP-1875's holding site have been compromised. As a result, all electronic communications with the facility have been severed pending further notice. Each headquarters has declared a moratorium on future November 77 exercises until such time as we fully understand how 1875 transmits and recedes wireless communication signals. Accordingly, I have amended these procedures with two clauses. 1. Exposure of SCP-1875 to wireless data networks and 2. Treatment of individuals exposed to 1875-IMG-1AB Special Containment Procedures SCP-1875 has never come within transmission range of any wireless data network. The machine's container must be enclosed by a Faraday cage, and it must have a fully mechanical locking mechanism. The holding site's full-time staff must include at least two network security experts, one armed security guard, and one child psychology specialist. When the machine is fully assembled and activated, the speed adjustment lever on SCP-1875-3 may not be set to 5, maximum speed without direct supervision by the site's level 4 supervisor. Electronic devices with data storage capacity may not be introduced to the facility, except during Exercise 1875 November 77, and all individuals must be screened for such devices prior to entering the holding site. In the event of Exercise 1875 November 77, Overwatch headquarters will permit one designated and clearly marked laptop computer to be taken into SCP-1875's primary shielded container. Upon completion of November 77, facility staff must ensure this designated laptop is shredded in the facility's scrap metal shredder. Research data may only be removed from the container in the form of a paper printout. Any evidence of 1875-IMG-1AB exposure must be reported immediately to Overwatch headquarters. Description SCP-1875 is a Victorian-era chest automaton consisting of four principal components, hereafter referred to as SCP-1875-1, SCP-1875-2, SCP-1875-3, and SCP-1875-4. A steel chestboard table, 72 x 72 x 64 cm, with a standard 8 x 8 grid of 64 checkered squares painted on its surface. Based on its composition in Petina, research staff have identified the exact material's English crucible steel, likely cast between 1820 and 1870 on 1990 Mobile Task Force Retreat SCP-1875 from an abandoned laboratory facility discovered beneath the former residence of University Professor N. Shire, England. A driveshaft designed to connect with SCP-1875-3 protrude from one side of the system's otherwise seamless enclosure. The table contains a sophisticated mechanical and biological system that controls a matrix of 64 electromagnets using an analytical engine composed of the combined brain tissue of the twin daughters, designated SCP-1875-1 forward slash A and dash 1 forward slash B, a Russian chest prodigy. Each square on the chestboard surface sits above a single electromagnet, and each electromagnet can move one chest piece to one of eight neighboring squares. Researchers have developed several theories regarding the control mechanism's functional specifications, but the nature of its biological component and possible sentience remain unverified. SCP-1875-2 A complete set of 32 chest pieces carved in the oriental style from human bone. Each piece is affixed to a thin, 0.31 centimeter base pad of ferrobagnetic iron. Samples of the bone used for the pieces have been matched genetically with tissue samples from SCP-1875-1 forward slash A and SCP-1875-1 forward slash B. Given the recovery of SCP-1875-1, an anonymous individual associated with Professor ██████ estate submitted information to Foundation personnel regarding these chest pieces, leading to their subsequent discovery in the possession of ██████ in New York City's Washington Square Park. SCP-1875-3 A stationary steam engine manufactured by Modsley's Sons and Field, circa 1840, also acquired from the estate of Professor ██████ and designed to spin SCP-1875-1's driveshaft. The engine has been modified from factory stock to allow speed adjustments. It has five speed settings, labeled in Roman numerals. SCP-1875-4 A pseudo-18th century samurai armor in a gosoku style, arrived in storage case with SCP-1875-3 courtesy of Professor ██████ estate. Historical evidence suggests that SCP-1875-4 would have been situated on a chair beside the chess table, serving as a performance prop. Staff have not observed any objectively unusual activities, however, several visiting researchers have reported prolonged feelings of anxiety after making eye contact with the armor's faceplate. Addendum 01 Intake Report SCP-1875 Personnel Involved Intake Analyst Date ██-1990 Location Site Description SCP-1875 appears to be a fully mechanical chess-playing machine from the mid-19th century. Unlike other early mechanical chess devices, see Standage Tom, the Turk, the life and time to the famous 18th century chess-playing machine, SCP-1875 does not appear to be designed to conceal a human operator within its case. SCP-1875 was built for the same purpose as contemporaneous devices, as the traveling curiosity designed to be played by volunteered before a group of spectators who would be charged an admission fee. Countries of several of the machine's previous owners are known, see ██-1990, but reliable information regarding its original designers and fabricators remain elusive. When questioned about the origin of SCP-1875, a representative from the estate of Professor ██-1990 erected us to a Russian newspaper clipping, see ██-1990, found among the Professor's belongings. The article concerns the disappearance of the twin 14-year-old daughters of Russian chess champion ██-1980 on ██-18. Subsequent historical records indicate that the girls were never found, and that Russian authorities failed to identify the persons responsible. However, we have yet to establish any connection between these events and SCP-1875. Evidence of the machine's public appearances beginning in ██-18 under the name Samurai have been found in Russian, British, and American newspaper archives, see ██-1990, the last recorded appearance of the Samurai occurred on ██-1906 in San Francisco, California. Its owners at the time, sideshow proprietor Mr ██-1990, perished in the aftermath of the earthquake that struck San Francisco later that month. SCP-1875 was presumed to have been destroyed as well until its recent discovery by the Foundation. After assembling the components of SCP-1875 at the site ██-18, intake facility, we have begun testing the device for anomalous properties. Addendum 02, Incident ██-1875-55A Source ██-1875-P Inbox Archive File ██-1875- From ██-1875-P Department Research Director ██-2 DL-1875 Subject ██-1875-55 Date ██-1177-1999 1107-1999 1658 Upon complete assembly, it was confirmed that SCP-1875's chest hardware is fully operational. In this test, a modern chest computer with variable strength software was used to measure SCP-1875's analytical intelligence. We positioned one member of Class D personnel ██-1875-D1 in containment with the machine, seated behind the chestboard's black side and facing ██-1875-4, which we positioned behind the white side. Five chest gains were played, one on each of the steam engine's speed settings. Instructions were provided through wireless speakers from behind plexiglass shielding to move each piece. SCP-1875-D1 remained unharmed and returned to site ██-4 for next assignment. Here's a quick list of the chest strength at each setting, as estimated on ELO rating system. We're confident about the numbers measured on settings ██-1 through ██-4. ██-8 to ██-1,000 ELO ██-2, ██-1,000 to ██-1200 ██-3, ██-1200 to ██-2500, ██-4, ██-2500 to ██-5, ██-0 to ██-5. Tests on setting ██-5 remained outlier, and so we performed additional tests with chest proficient researchers. See file 1875-5- ██-5 games ██-1. Initially, SCP-1875 exceeded ██-1, a ██-0 percent increase from the maximum rating measured in our setting for tests. After game ██-1, SCP-1875 chest play was marked by illogical moves. During game ██-1, illegal moves were observed, forcing us to abandon games in progress. This activity was seen more frequently as testing progressed. After game ██-1, erratic peace movement was observed. The speed at which SCP-1875 moved its pieces increased, and it began to violently ram pieces together on the board. Several chest pieces were chipped, and we decided to cease testing until we can determine a way to proceed without causing more damage. Staff currently suspects that setting ██-5 may be malfunctioning due to excess age and wear. Five minutes later, the following was sent to all members of the SCP-1875 email distribution list. Item ██-1875-P Research Analyst ██-2 DL-1875 Subject ██-4 Reply Test ██-1875-55 Date ██-1177-1999 1107-1999 1703 Attachment ██-1 Waxmat BL.17.2 MB A1-B2-C3-D4-E5-56-H7-G8 1875-IMG-1AB ██-1875-IMG-1AB is an image file that appeared in the body of the suspicious email above. It has been removed from this report due to unknown memetic properties, which caused an adverse reaction in ██ personnel who unintentionally viewed it while checking email on 7 November 1999 before others could be notified. The image appears to be a black-and-white photograph of two young girls, though first-hand accounts describe it as distorted or stretched in a visually disturbing manner. Waxmat BL. is an executable file, written to control subtle background movements in 1875-IMG-1AB. It is theorized to drive 1875-IMG-1AB's memetic effect, though researchers have yet to confirm this. The reaction to 1875-IMG-1AB exposure was characterized by symptoms T-plus-0 exposure, mild anxiety T-plus-15 minutes, headache, elevated body temperature T-plus-2 hours, restlessness, insomnia, auditory hallucination reported, often heard as quiet childlike laughter T-plus-4 hours, visual hallucination reported, intense anxiety T-plus-7 hours, subject to remain conscious, though increasingly unresponsive to external stimuli T-plus-11 hours, brief period of lucidity, subject appears to recover and will demand immediate access to computer on which 1875-IMG-1AB was viewed T-plus-12 hours, self-mutilation observed T-plus-14 hours Reminder, the first priority for responding to any 1875-IMG-1AB exposure scenario must be removing the exposed persons from their workstations immediately, and isolating them from all networked computers O5 Adendum 03, Incident 1875-55B E4 Night, night, night Knock, knock, who's there? We see you, East Side Steve, and the pawn and the king are in the same box. Adendum 04, Exercise 1875, November 77