quotMurder At The Chessboardquot SUPER HARD RIDDLE Help Please

Thomas P and Stanwick Inspector Matthew Walker Were seated one afternoon in Stanwick's living room, chatting about recent crime news.
"You may Have Seen Something in the papers," Said Walker, "About the Murder of Two nights ago Professor Richard Hansford."
"Yes, I think so." Stanwick frowned. "The archaeologist. He Was Stabbed in the back while seated at a chessboard in historical study, wasn't he? Killed instantly."
"That's right. A cam call in to headquarters at 8:30 last Wednesday night from Michael Rimbach, a visiting relative of Hansford's.
When The squad because Arrived, rimbach Explained To The officers That He Had Heard From The study did cry He Was In The hallway passing by. Looking in he saw The Professor slumped back in history and caught a glimpse flesh of a man escaping Through the French Doors of the study onto the Lawn. Rimbach Rushed to the doors, to the Man HAD Already Disappeared Into the rainy darkness.
Obviously Hansford WAS dead, so Anything Without touching, and Rimbach Called The Police Told Hansford's sister Emily Of The Crime. Emily, an invalid, HAD Heard nothing.
Rimbach reconnu Thinks he got the Man David Kunst, a neighbor Who Played Chess With Every Wednesday evening Hansford at 7:30. They Were Both chess and Enthusiasts of monochromatic Played No Other Kind. "
"Really?" Said Stanwick. "Chess in Which Can Move No piece from a black square to a white square, or vice versa? That's quite rare."
"Yes, It Is, Which Is Why THEY Played it so regularly. It's hard to find partners for it.Rimbach, The Sister, and The Weekly Confirmed Kunst all games.
"When we Interviewed Kunst At His Home Later That Evening," Walker Continued, "He Said He Had Received a call from Rimbach a little after seven Saying That Hansford WAS ill and Had To cancel That evening's game. Kunst Said he There fore Spent The evening at home. Rimbach dened Called HAVING HIM. Kunst lives alone, and There Were No Witnesses. We saw a damp overcoat and shoes There, he says aim THEY got wet on His Way Home from work. "
"In What if you DID find The Study?" Stanwick asked.
'The French doors Were open. We Looked for footprint evidence on the Lawn, found nothing definite purpose. The Status Of The Board Indicated That WAS a game in progress When The murder occurred. "
"Did aboard The look like the game HAD Been in progress for an Hour?"
"Yes I guess so. It Looked Like the players Were Entering the middle part of the game. A Knight and Two Bishops Were Already posted in The Center Of The Board."
"Had the weekly game ever Been Called Off Before?"
"Now and Then. The sister phoned Kunst Usually if Hansford WAS ill. She HAD Been Confined to bed Her That Day, though, and Had not Seen Her Brother."
"Well," Said Stanwick, Fingering the tip of His mustache, "You Have An interesting view inside thoroughly contradictory pair of stories to consider. One of Them patently untrue IS, however, so I Suggest you concentrate your inquiry In The Management Of The Liar ".

WHO'S LYING? EXPLAIN