unintentionally left this running overnight

[MikeB]

some might find this interesting - about ~1.2 trillion nodes - position from the last rapid game between the Carlsen and Karjakin, Carlsen played 47.Qxf4 which led to 47. ...Ra2+ 48.Kh1 Qf2 49.Rc8+ Kh7 50.Qh6+!

position startpos moves e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f2f3 e7e5 d4b3 f8e7 c2c4 a7a5 c1e3 a5a4 b3c1 e8g8 b1c3 d8a5 d1d2 b8a6 f1e2 a6c5 e1g1 c8d7 a1b1 f8c8 b2b4 a4b3 a2b3 a5d8 c1d3 c5e6 d3b4 d7c6 f1d1 h7h5 e2f1 h5h4 d2f2 f6d7 g2g3 a8a3 f1h3 c8a8 b4c2 a3a6 c2b4 a6a5 b4c2 b7b6 d1d2 d8c7 b1d1 e7f8 g3h4 e6f4 e3f4 e5f4 h3d7 c7d7 c2b4 a5a3 b4c6 d7c6 c3b5 a3b3 b5d4 c6c4 d4b3 c4b3 f2e2 f8e7 g1g2 b3e6 h4h5 a8a3 d2d3 a3a2 d3d2 a2a3 d2d3 a3a7 d3d5 a7c7 e2d2 e6f6 d5f5 f6h4 d1c1 c7a7

[d]6k1/r3bpp1/1p1p4/5R1P/4Pp1q/5P2/3Q2KP/2R5 w - - 15 47

Code: Select all

<< info depth 41 seldepth 88 multipv 1 score cp 12379 nodes 265217142529 nps 29885315 hashfull 999 tbhits 786792928 time 8874497 pv c1c8 e7d8 h5h6 g8h7 h6g7 h7g7 f5f4 d8g5 d2b2 g5f6 f4f6 h4g5 g2f1 g5e5 b2e5 d6e5 f6b6 a7e7 b6b8 e7e6 c8g8 g7f6 g8h8 e6e7 h8e8 e7c7 b8b6 f6g5 e8g8 g5f4 b6b3 f7f5 g8f8 f4g5 f8f5 g5h6 b3b6 h6g7 f5f6 g7g8 f6c6 c7f7 c6g6 g8h8 g6h6 h8g8 f1g2 g8g7 h6f6 f7e7 g2g3 e7e8 f6e6 e8c8 e6g6 g7h7 g6f6 c8g8 g3f2 g8a8 f6d6 h7h8 d6d7 a8c8
<< info depth 42 seldepth 88 multipv 1 score cp 12371 upperbound nodes 266965604686 nps 29897497 hashfull 999 tbhits 795033428 time 8929363 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 12343 upperbound nodes 266980812803 nps 29897593 hashfull 999 tbhits 795111477 time 8929843 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 12253 upperbound nodes 267037777121 nps 29897979 hashfull 999 tbhits 795380589 time 8931633 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 12186 upperbound nodes 267043215770 nps 29897992 hashfull 999 tbhits 795407844 time 8931811 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 12153 upperbound nodes 267046664607 nps 29898006 hashfull 999 tbhits 795427655 time 8931922 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 12072 upperbound nodes 267046848401 nps 29898007 hashfull 999 tbhits 795428286 time 8931928 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 12034 upperbound nodes 267047258428 nps 29898009 hashfull 999 tbhits 795429597 time 8931941 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 11956 upperbound nodes 267048115013 nps 29898008 hashfull 999 tbhits 795433283 time 8931970 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 11856 upperbound nodes 267048513753 nps 29898009 hashfull 999 tbhits 795435509 time 8931983 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 11760 upperbound nodes 267049787906 nps 29898011 hashfull 999 tbhits 795440987 time 8932025 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 11638 upperbound nodes 267050217836 nps 29898012 hashfull 999 tbhits 795443161 time 8932039 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 11393 upperbound nodes 267051043046 nps 29898014 hashfull 999 tbhits 795446998 time 8932066 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 11213 upperbound nodes 267051329362 nps 29898013 hashfull 999 tbhits 795448222 time 8932076 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 10989 upperbound nodes 267051494604 nps 29898015 hashfull 999 tbhits 795448839 time 8932081 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 10585 upperbound nodes 267052974651 nps 29898017 hashfull 999 tbhits 795457683 time 8932130 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 10357 upperbound nodes 267053312236 nps 29898017 hashfull 999 tbhits 795460059 time 8932141 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 9939 upperbound nodes 267055549067 nps 29898024 hashfull 999 tbhits 795475213 time 8932214 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 10315 lowerbound nodes 267793962227 nps 29903087 hashfull 999 tbhits 799349267 time 8955395 pv c1c8
<< info depth 42 seldepth 88 multipv 1 score cp 10958 lowerbound nodes 268319757851 nps 29906831 hashfull 999 tbhits 802274291 time 8971855 pv c1c8
<< info depth 42 seldepth 88 multipv 1 score cp 11765 lowerbound nodes 269058399139 nps 29911406 hashfull 999 tbhits 806522494 time 8995177 pv c1c8
<< info depth 42 seldepth 88 multipv 1 score cp 10890 upperbound nodes 273492312907 nps 29939038 hashfull 999 tbhits 825206437 time 9134973 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 11932 lowerbound nodes 274989889717 nps 29947294 hashfull 999 tbhits 830651373 time 9182462 pv c1c8
<< info depth 42 seldepth 88 multipv 1 score cp 10777 upperbound nodes 285194160493 nps 29996775 hashfull 999 tbhits 872354040 time 9507494 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 11841 lowerbound nodes 289929164661 nps 30020559 hashfull 999 tbhits 890559695 time 9657687 pv c1c8
<< info depth 42 seldepth 88 multipv 1 score cp 10308 upperbound nodes 312073565782 nps 30114841 hashfull 999 tbhits 969248434 time 10362783 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 7205 upperbound nodes 312135068104 nps 30115208 hashfull 999 tbhits 969466551 time 10364699 pv c1c8 e7d8
<< info depth 42 seldepth 88 multipv 1 score cp 9410 lowerbound nodes 312792678588 nps 30119031 hashfull 999 tbhits 971848029 time 10385217 pv c1c8
<< info depth 42 seldepth 88 multipv 1 score cp 12819 nodes 317878785522 nps 30144045 hashfull 999 tbhits 992143583 time 10545326 pv c1c8 e7d8 h5h6 b6b5 d2b2 h4h6 c8d8 g8h7 f5b5 a7c7 b2b1 g7g6 b1b2 h6g7 b2g7 h7g7 d8d6 c7c1 b5b7 c1a1 g2h3 a1g1 d6d7 g7f6 d7f7 f6e5 b7b5 e5d4 f7f4 d4c4 f4g4 g1a1 b5b6 c4d3 g4g6 d3e3 b6b3 e3d4 g6d6 d4c4 b3b6 a1g1 d6c6 c4d4 c6g6 g1a1 g6d6 d4c4 h3g2 a1a2 g2g3 a2a8 d6d5 a8a7 h2h4 a7f7 g3f2 f7a7 h4h5 a7a2 f2g3 a2a7 h5h6 a7h7 g3f2 h7a7 h6h7 a7a2 f2g3 a2a8 h7h8r a8h8 b6c6 c4b4 d5b5 b4a4 c6a6 a4b5
<< info depth 43 seldepth 88 multipv 1 score cp 12825 nodes 332788576931 nps 30200258 hashfull 999 tbhits 1040992615 time 11019395 pv c1c8 e7d8 h5h6 b6b5 d2b2 h4h6 c8d8 g8h7 f5b5 a7c7 b2b1 g7g6 b1b2 h6g7 b2g7 h7g7 d8d6 c7c3 b5b7 c3a3 d6d7 g7f6 d7f7 f6e6 f7f4 e6e5 f4g4 a3a6 b7b5 e5f6 g2g3 a6c6 b5g5 c6c8 g5g6 f6e5 g4f4 c8a8 g6g5 e5e6 f4f5 e6e7 g5g6 a8h8 f5f6 h8c8 f6b6 e7f7 g6h6 f7g8 h6c6 c8a8 b6b7 g8h8 c6c7 a8g8 g3f2 g8e8 c7h7 h8g8 b7g7 g8f8 h7h8 f8g7 h8e8
<< info depth 44 seldepth 88 multipv 1 score cp 12825 nodes 347593195241 nps 30261819 hashfull 999 tbhits 1091745803 time 11486196 pv c1c8 e7d8 h5h6 h4e7 h6g7 a7c7 c8b8 g8g7 d2b2 g7g6 b2h8 e7h4 h8h4 d8h4 b8g8 g6h6 g8h8 h6g7 h8h4 c7c2 g2h3 c2c7 h4f4 d6d5 f5d5 c7b7 h3g2 b6b5 f4f5 b5b4 d5b5 b7c7 b5b4 g7f8 b4b6 f8e7 b6f6 c7c8 f6f7 e7e6 g2g3 c8g8 g3f4 e6d6 f7f6 d6e7 f6b6 g8a8 f5g5 a8f8 f4g3 f8d8 g5g7 e7f8 b6b7 d8d6 g7d7 d6g6 g3f4 g6e6 d7d8 e6e8 d8e8 f8e8
<< info depth 45 seldepth 88 multipv 1 score cp 12826 nodes 356657380000 nps 30287205 hashfull 999 tbhits 1120268449 time 11775843 pv c1c8 e7d8 h5h6 h4e7 h6g7 a7c7 c8b8 e7h4 f5f4 h4g5 g2h1 c7d7 b8c8 g5a5 d2d1 a5e5 f4g4 d6d5 d1f1 d5e4 g4e4 e5d6 f1g1 d6g6 g1g6 f7g6 e4e8 g8g7 e8d8 d7a7 c8b8 b6b5 h1g2 b5b4 b8b4 a7a6 b4b7 g7f6 g2g3 f6e5 b7b5 e5f6 d8b8 a6a1 b5b6 f6g7 b8b7 g7h6 b7f7 a1g1 g3f2 g1c1 b6b8 h6g5 f2g3 c1g1 g3h3 g1f1 f3f4 f1f4 f7f4
<< info depth 46 seldepth 88 multipv 1 score cp 12826 nodes 367723419206 nps 30331717 hashfull 999 tbhits 1162424091 time 12123396 pv c1c8 e7d8 h5h6 h4e7 h6g7 a7c7 c8b8 g8g7 d2b2 f7f6 f5f4 d6d5 b2d2 e7d6 f4h4 g7g8 d2f4 d6f4 b8d8 g8f7 h4f4 f7e7 d8d5 c7a7 d5f5 e7d6 f5f6 d6c5 f4f5 c5d4 f6b6 d4e3 h2h4 a7a2 g2g3 a2a7 f5g5 a7a1 b6b3 e3d4 g5d5 d4c4 b3b6 a1a7 d5d6 c4c5 g3f4 c5c4 h4h5 c4c5 h5h6 c5c4 h6h7 a7a8 h7h8q a8h8 f4e3 h8h5 d6c6 h5c5 c6c5
<< info depth 47 seldepth 88 multipv 1 score cp 12827 nodes 407045144441 nps 30434733 hashfull 999 tbhits 1293682374 time 13374362 pv c1c8 e7d8 h5h6 h4e7 h6g7 a7c7 c8b8 e7h4 f5f4 h4g5 g2h1 c7d7 b8c8 b6b5 e4e5 d7a7 d2d4 d6e5 c8d8 g8g7 f4g4 e5d4 g4g5 g7f6 g5b5 d4d3 d8d3 a7a2 d3d4 f6e6 d4e4 e6f6 e4f4 f6e6 b5b6 e6e7 b6b7 e7e6 f4f7 e6e5 b7b5 e5e6 f7c7 a2a6 c7h7 a6a1 h1g2 e6f6 b5b6 f6e5 h7d7 a1a8 f3f4 e5e4 d7d4 e4f5 d4d5 f5e4 b6e6 e4d5
<< info depth 48 seldepth 88 multipv 1 score cp 12826 nodes 453514113050 nps 30539249 hashfull 999 tbhits 1468386199 time 14850205 pv c1c8 e7d8 h5h6 a7d7 h6g7 b6b5 e4e5 g8g7 d2d4 g7h7 d4e4 h7h6 e5e6 d6d5 e4e5 d7a7 e5d5 f7f6 c8d8 a7g7 g2f1 h4h3 f1e1 g7g1 e1d2 h3g2 d2c3 g1c1 c3b4 g2b2 b4a5 b2c3 a5a6 c3c6 d5c6 c1c6 a6b5 c6e6 f5f4 f6f5 d8g8 h6h5 f4f5 h5h6 f5f4 h6h7 g8g1 e6e5 b5c6 e5e6 c6d7 e6h6 f4g4 h6h5 g4g7 h7h8 g7g8 h8h7 g1g7 h7h6 g8h8 h6g7
<< info depth 49 seldepth 88 multipv 1 score cp 12828 nodes 601851063143 nps 30768633 hashfull 999 tbhits 2181961359 time 19560539 pv c1c8 e7d8 h5h6 a7d7 h6g7 b6b5 e4e5 g8g7 d2d4 g7h7 d4e4 h7h6 e5e6 d6d5 e4e5 d7a7 e5d5 f7f6 c8d8 a7g7 g2f1 h4h3 f1e1 g7g1 e1d2 h3g2 d2c3 g1c1 c3b4 g2b2 b4a5 b2c3 a5a6 c3c6 d5c6 c1c6 a6b5 c6e6 f5f4 e6e5 b5c6 e5e6 c6d7 e6e5 d7d6 e5a5 d6e6 f6f5 f4f5 a5a4 d8d7 a4a6 e6f7 h6h7 f5h5 a6h6 h5h6
<< info depth 50 seldepth 88 multipv 1 score cp 12828 nodes 659239358998 nps 30837719 hashfull 999 tbhits 2480972405 time 21377695 pv c1c8 e7d8 h5h6 a7d7 h6g7 h4h6 d2d5 h6g6 g2h1 g6e6 d5e6 f7e6 f5f8 g8g7 f8d8 d7e7 d8d6 g7f6 d6b6 f6e5 c8c6 e5d4 c6e6 e7a7 e6d6 d4c3 b6c6 c3b3 h2h4 a7a1 h1g2 a1a5 d6g6 a5a2 g2h3 a2a7 h3g4 b3b4 h4h5 b4b5 h5h6 a7h7 g4f4 h7f7 c6f6 f7a7 f6b6 b5c4 h6h7 a7a8 h7h8q a8h8 f4e3 h8h5 g6c6 h5c5 c6c5
<< info depth 51 seldepth 88 multipv 1 score cp 12828 nodes 780379611330 nps 30955749 hashfull 999 tbhits 3074218347 time 25209521 pv c1c8 e7d8 h5h6 h4e7 h6g7 a7c7 c8b8 e7h4 f5f4 h4g5 g2h1 c7d7 b8c8 g5b5 d2d1 b5e5 f4g4 d6d5 d1f1 d5e4 g4e4 e5f6 e4e8 g8g7 f1g2 f6g6 e8d8 g6g2 h1g2 d7a7 d8g8 g7f6 c8c6 f6e5 c6b6 e5f4 g8g4 f4e5 g4g7 a7a2 g2g3 f7f5 g7e7 e5d5 e7d7 d5c5 g3f4 a2a4 f4f5 a4a3 d7d4 a3a8 d4c4 c5d5 b6d6 d5c4
<< info depth 52 seldepth 88 multipv 1 score cp 12828 nodes 783757375743 nps 30956206 hashfull 999 tbhits 3093845104 time 25318263 pv c1c8 e7d8 h5h6 h4e7 h6g7 a7c7 c8b8 e7h4 f5f4 h4g5 g2h1 c7d7 b8c8 g5b5 d2d1 b5e5 f4g4 d6d5 d1f1 d5e4 g4e4 e5f6 e4e8 g8g7 f1g2 f6g6 e8d8 g6g2 h1g2 d7a7 d8g8 g7f6 c8c6 f6e5 c6b6 e5f4 g8g4 f4e5 g4g7 a7a2 g2g3 f7f5 g7e7 e5d5 e7d7 d5c5 g3f4 a2a4 f4f5 a4a3 d7d4 a3a8 d4c4 c5d5 b6d6 d5c4
<< info depth 53 seldepth 88 multipv 1 score cp 12828 nodes 785703263523 nps 30956438 hashfull 999 tbhits 3103407762 time 25380932 pv c1c8 e7d8 h5h6 h4e7 h6g7 a7c7 c8b8 e7h4 f5f4 h4g5 g2h1 c7d7 b8c8 g5b5 d2d1 b5e5 f4g4 d6d5 d1f1 d5e4 g4e4 e5f6 e4e8 g8g7 f1g2 f6g6 e8d8 g6g2 h1g2 d7a7 d8g8 g7f6 c8c6 f6e5 c6b6 e5f4 g8g4 f4e5 g4g7 a7a2 g2g3 f7f5 g7e7 e5d5 e7d7 d5c5 g3f4 a2a4 f4f5 a4a3 d7d4 a3a8 d4c4 c5d5 b6d6 d5c4
<< info depth 54 seldepth 88 multipv 1 score cp 12828 nodes 821660824441 nps 30972599 hashfull 999 tbhits 3303352145 time 26528636 pv c1c8 e7d8 h5h6 h4e7 h6g7 a7c7 c8b8 e7h4 f5f4 h4g5 g2h1 c7d7 b8c8 g5b5 d2d1 b5e5 f4g4 d6d5 d1f1 d5e4 g4e4 e5f6 e4e8 g8g7 f1g2 f6g6 e8d8 g6g2 h1g2 d7a7 d8g8 g7f6 c8c6 f6e5 c6b6 e5f4 g8g4 f4e5 g4g7 a7a2 g2g3 f7f5 g7e7 e5d5 e7d7 d5c5 g3f4 a2a4 f4f5 a4a3 d7d4 a3a8 d4c4 c5d5 b6d6 d5c4
<< info depth 55 seldepth 88 multipv 1 score cp 12829 nodes 1208268566891 nps 31218701 hashfull 999 tbhits 5730712422 time 38703357 pv c1c8 e7d8 h5h6 g7h6 e4e5 g8g7 e5d6 a7a5 d2b2 g7g6 f5a5 b6a5 b2h8 h4g5 g2h1 g5b5 h8g8 g6f5 g8f7 f5e5 c8c4 b5b1 h1g2 b1b2 g2h3 b2f2 c4e4 e5d6 e4e6 d6c5 f7a7 c5d5 a7d7 d5c4 e6e4 c4c3 d7c6 c3b2 c6b5 b2c1 e4c4 f2c2 c4c2 c1c2 b5c4 c2d1 c4d3 d1e1 d3d8 a5a4 d8e8 e1f1 e8a4 f1e2 a4f4

[S.Taylor]

I was just thinking, you better not leave too many positions running overnight with the top engines of the future!
You might end up in the morning with the wierdest sacrifices which humans will NEVER understand!

[S.Taylor]

Oh!! I see this position from Karjakin Carlsen last rapid game!
So what is it saying? That it could be a draw?

[MikeB]

Oh!! I see this position from Karjakin Carlsen last rapid game!
So what is it saying? That it could be a draw?

First, your first comment made me LOL , the analysis shows a tb mate for Carlsen beginning with Rc8 if my memory is correct.

[S.Taylor]

But what Carlsen actually played was Qxf4, and after ...QxQ (or Ra7+ first) it may have been a draw?

[MikeB]

But what Carlsen actually played was Qxf4, and after ...QxQ (or Ra7+ first) it may have been a draw?

The game would have been much longer if Karjakin had played QxQ, but he played 48. ... Qf2 instead

[pgn][Event "FWCCM2016"]
[Site "New York"]
[Date "2016.11.30"]
[Round "16.1"]
[White "Magnus Carlsen"]
[Black "Sergey Karjakin"]
[Result "1-0"]
[BlackElo "2772"]
[WhiteElo "2853"]
[LiveChessVersion "1.4.8"]
[ECO "B54"]

1. e4 {[%clk 0:25:18]} c5 {[%clk 0:25:19]} 2. Nf3 {[%clk 0:25:27]} d6
{[%clk 0:25:28]} 3. d4 {[%clk 0:25:35]} cxd4 {[%clk 0:25:37]} 4. Nxd4
{[%clk 0:25:43]} Nf6 {[%clk 0:25:46]} 5. f3 {[%clk 0:25:51]} e5 {[%clk 0:25:31]}
6. Nb3 {[%clk 0:25:54]} Be7 {[%clk 0:25:01]} 7. c4 {[%clk 0:25:55]} a5
{[%clk 0:24:53]} 8. Be3 {[%clk 0:25:56]} a4 {[%clk 0:25:00]} 9. Nc1
{[%clk 0:26:02]} O-O {[%clk 0:24:06]} 10. Nc3 {[%clk 0:25:46]} Qa5
{[%clk 0:22:51]} 11. Qd2 {[%clk 0:24:17]} Na6 {[%clk 0:18:05]} 12. Be2
{[%clk 0:23:32]} Nc5 {[%clk 0:17:47]} 13. O-O {[%clk 0:22:46]} Bd7
{[%clk 0:17:20]} 14. Rb1 {[%clk 0:22:00]} Rfc8 {[%clk 0:15:37]} 15. b4
{[%clk 0:21:41]} axb3 {[%clk 0:15:45]} 16. axb3 {[%clk 0:21:49]} Qd8
{[%clk 0:15:00]} 17. Nd3 {[%clk 0:21:29]} Ne6 {[%clk 0:14:51]} 18. Nb4
{[%clk 0:21:35]} Bc6 {[%clk 0:14:37]} 19. Rfd1 {[%clk 0:21:18]} h5
{[%clk 0:14:20]} 20. Bf1 {[%clk 0:17:10]} h4 {[%clk 0:14:27]} 21. Qf2
{[%clk 0:17:08]} Nd7 {[%clk 0:14:07]} 22. g3 {[%clk 0:15:02]} Ra3
{[%clk 0:09:31]} 23. Bh3 {[%clk 0:14:14]} Rca8 {[%clk 0:09:37]} 24. Nc2
{[%clk 0:13:27]} R3a6 {[%clk 0:09:34]} 25. Nb4 {[%clk 0:13:32]} Ra5
{[%clk 0:09:38]} 26. Nc2 {[%clk 0:12:49]} b6 {[%clk 0:09:13]} 27. Rd2
{[%clk 0:10:43]} Qc7 {[%clk 0:03:00]} 28. Rbd1 {[%clk 0:10:32]} Bf8
{[%clk 0:01:59]} 29. gxh4 {[%clk 0:09:38]} Nf4 {[%clk 0:01:22]} 30. Bxf4
{[%clk 0:09:42]} exf4 {[%clk 0:01:31]} 31. Bxd7 {[%clk 0:09:24]} Qxd7
{[%clk 0:01:38]} 32. Nb4 {[%clk 0:08:03]} Ra3 {[%clk 0:00:28]} 33. Nxc6
{[%clk 0:04:14]} Qxc6 {[%clk 0:00:37]} 34. Nb5 {[%clk 0:04:10]} Rxb3
{[%clk 0:00:42]} 35. Nd4 {[%clk 0:04:18]} Qxc4 {[%clk 0:00:51]} 36. Nxb3
{[%clk 0:04:26]} Qxb3 {[%clk 0:01:00]} 37. Qe2 {[%clk 0:04:11]} Be7
{[%clk 0:00:42]} 38. Kg2 {[%clk 0:03:31]} Qe6 {[%clk 0:00:14]} 39. h5
{[%clk 0:03:33]} Ra3 {[%clk 0:00:18]} 40. Rd3 {[%clk 0:02:54]} Ra2
{[%clk 0:00:27]} 41. R3d2 {[%clk 0:02:59]} Ra3 {[%clk 0:00:36]} 42. Rd3
{[%clk 0:03:07]} Ra7 {[%clk 0:00:34]} 43. Rd5 {[%clk 0:03:10]} Rc7
{[%clk 0:00:30]} 44. Qd2 {[%clk 0:02:52]} Qf6 {[%clk 0:00:13]} 45. Rf5
{[%clk 0:02:56]} Qh4 {[%clk 0:00:22]} 46. Rc1 {[%clk 0:02:45]} Ra7
{[%clk 0:00:14]} 47. Qxf4 {[%clk 0:01:54]} Ra2+ {[%clk 0:00:14]} 48. Kh1
{[%clk 0:02:01]} Qf2 {[%clk 0:00:17]} 49. Rc8+ {[%clk 0:01:42]} Kh7
{[%clk 0:00:25]} 50. Qh6+ {[%clk 0:01:50]} 1-0[/pgn]

[S.Taylor]

Exactly!
But your computer said overnight that Carlsen didn't need to offer a queen exchange at all, but could have mated before that with an earlier c1c8+.

[Lyudmil Tsvetkov]

But what Carlsen actually played was Qxf4, and after ...QxQ (or Ra7+ first) it may have been a draw?

no draw, even after the exchange, white has sufficiently large advantage.