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Subject: Re: Forced mate so solve...

Author: Pete Galati

Date: 08:49:11 02/05/01

Go up one level in this thread


On February 05, 2001 at 07:23:58, leonid wrote:

>Hi!
>
>If you like to solve forced mate position full of "depleted uranium"...
>
>[D]NKBN4/QRQ3rR/2Qb2r1/N1b1nb2/B2nbbbB/1RNqqqq1/8/2N2k2 b - -
>
>Please, indicate your result.
>
>Thanks,
>Leonid.

Hmmmm, for some odd reason, when I use TCB to analyze a position, it seems to
refuse to show the mate, even though it seems clear to me that TCB CAN see the
mate (if I can see it, then TCB can see it!!)

xboard : edit
00:00:00,00 OnPositionSet : NKBN4/QRQ3rR/2Qb2r1/N1b1nb2/B2nbbbB/1RNqqqq1/8/2N2k2
b - - 0 1
xboard : analyze
00:00:00,00 OnGearShift : Infinite
Time limits = 1.p1 : Short = 00:00:10,50; Average = 00:00:21,00; Long =
00:01:24,00; Limit = 00:11:15,00;
Hash table cleared
evs.playerComputer changed
00:00:00,49 InfoDepth : 1
00:00:00,66 InfoPV : nodes = 75970 eval = 1314 1... Rxc7
00:00:00,66 InfoPV : nodes = 80428 eval = 1315 1... Bxc7+
00:00:01,59 InfoPV : nodes = 494576 eval = 1869 1... Bxc7+
00:00:01,59 InfoPV : nodes = 494643 eval = 1870 1... Nexc6+
00:00:01,59 InfoPV : nodes = 497290 eval = 2427 1... Nexc6+
00:00:01,59 InfoDepth : 2
00:00:01,59 InfoPV : nodes = 499055 eval = 2427 1... Nexc6+ 2. Bxc6 Bxc7+
00:00:01,59 InfoDepth : 3
00:00:01,64 InfoPV : nodes = 501124 eval = 2437 1... Nexc6+ 2. Bxc6 Bxc7+ 3.
Nxc7 Bxa7+
00:00:01,64 InfoDepth : 4
00:00:01,70 InfoPV : nodes = 521221 eval = 2596 1... Nexc6+ 2. Naxc6 Bxa7+ 3.
Rxa7 Bxc7+ 4. Nxc7 Nxc6+
00:00:01,75 InfoDepth : 5
00:00:01,81 InfoPV : nodes = 552216 eval = 2610 1... Nexc6+ 2. Naxc6 Bxa7+ 3.
Nxa7 Bxc7+ 4. Nxc7 Bxc7+ 5. Ka8 Bxb7+
00:00:01,86 InfoPV : nodes = 560184 eval = 2611 1... Bxa7+
00:00:01,97 InfoPV : nodes = 583638 eval = 2743 1... Bxa7+ 2. Rxa7 Ndxc6+ 3.
Bxc6 Bxc7+ 4. Nxc7 Nxc6+ 5. Naxc6 Bxc7+
00:00:02,19 InfoDepth : 6
00:00:02,63 InfoPV : nodes = 724160 eval = 2765 1... Bxa7+ 2. Rxa7 Ndxc6+ 3.
Bxc6 Bxc7+ 4. Nxc7 Nxc6+ 5. Naxc6 Bxc7+ 6. Ka8 Bxc6+
00:00:03,46 InfoDepth : 7
00:00:05,16 InfoPV : nodes = 1302586 eval = 2754 1... Bxa7+ 2. Rxa7 Ndxc6+ 3.
Bxc6 Bxc7+ 4. Nxc7 Nxc6+ 5. Naxc6 Bxc7+ 6. Ka8 Bxc6+ 7. Nxc6 Qxc6+
00:00:10,98 InfoDepth : 8
00:00:11,15 InfoPV : nodes = 2609799 eval = 32742 1... Bxa7+ 2. Rxa7 Ndxc6+ 3.
Bxc6 Bxc7+ 4. Nxc7 Nxc6+ 5. Naxc6 Bxc7+ 6. Ka8 Bxc6+ 7. Nxc6 Qxc6+ 8. Bb7 Rg8+
00:00:11,15 InfoDepth : 8
00:01:42,60 InfoPV : nodes = 25496244 eval = 32742 1... Bxa7+ 2. Rxa7 Ndxc6+ 3.
Bxc6 Bxc7+ 4. Nxc7 Nxc6+ 5. Naxc6 Bxc7+ 6. Ka8 Bxc6+ 7. Nxc6 Qxc6+ 8. Bb7 Rg8+
xboard : exit
00:03:33,16 OnGearShift : Neutral
xboard : quit
00:03:33,16 OnGearShift : Stopped

After which 9. Bd8 is the only posible move, and 9....Rxd8# ends everything.

Pete



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