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11am Sunday, 9th January 2011 (UTC+0/GMT).

IvanHoe 50 (17/27) v Houdini 1.5 (14/27)

Top two.

Round 2, game 28, of category 39 tournament.

Opening books in use. Three points for win.

2pm Saturday, 8th January 2011 (UTC+0/GMT).

Deep Rybka 4 (5/24) v IvanHoe 50 (13/21)

Rybka yet to win a game.

Round 2, game 26, of category 39 tournament.

Opening books in use. Three points for win.

11am Monday, 3rd January 2011 (UTC+0/GMT).

Houdini 1.5 (3/6) v Deep Rybka 4 (2/6)

Round 1, game 7, of category 39 tournament.

Opening books in use rather than start positions for ladder matches.

Three points for win. Engines play each other four times. Six competing.

3pm Sunday, 2nd January 2011 (UTC+0/GMT).

IvanHoe 50 v Stockfish 1.9.1

Round 1, game 6, of new category 39 tournament.

Opening books in use rather than start positions for ladder matches.

Three points for win. Engines play each other four times. Six competing.

7pm Saturday, 1st January 2011 (UTC+0/GMT).

Stockfish 1.9.1 v Deep Rybka 4

Round 1, game 3, of new category 39 tournament.

Opening books in use rather than start positions for ladder matches.

Three points for win. Engines play each other four times. Six competing.

If you would like to see Stockfish 1.9.1 deliver mate on its 202nd move to Houdini 1.5, click here and select game 2 from the Viewer list.

Be ready for a wandering King, and endgame with Queens and Pawns.

Each side had 90 minutes.

Processor Intel® Core™ i3-330M Processor (3M Cache, 2.13 GHz, 2 cores, 4 hardware threads) Memory 2,936MB Operating System Windows 7, Home Premium Edition (Build 7600). Console Input Houdini_15_x64.exe info string POPCNT available info string 128 MB Hash setoption name threads value 2 [entered 4 on...

Ratings updated. Covers 674 games with a time control of 90 minutes each side. Zip and 7z compressed game files available. Know sample size is small.

3pm Thursday, 23rd December 2010 (UTC+0/GMT).

Houdini 1.5 v IvanHoe 50

Challenger Houdini needs half a point from three games to topple IvanHoe from rank 1.

Just two draws from nine games.

3pm Tuesday, 21st December 2010 (UTC+0/GMT).

Deep Rybka 4 v Houdini 1.5

Challenger Houdini needs half a point from four games to topple Rybka from rank 3.

Just two draws from eight games.