Author: John Merlino
Date: 09:02:11 10/10/01
Go up one level in this thread
On October 09, 2001 at 18:09:06, Dann Corbit wrote: >On October 09, 2001 at 13:01:13, Uri Blass wrote: > >>[D]8/1P6/8/5k2/2K4p/7r/1r4p1/6R1 b - - 0 61 >> >>This position is from the game Tao-Deep Junior7 in the last WMCCC >> >>Chest need some hours on p200 to see mate in 10(I used chest by the way that was >>explained by paul some days ago >> >>see http://www.icdchess.com/forums/1/message.shtml?191857 >> >>Solution:61...Rg3 62.Kd4 h3 63.Kd5 h2 64.b8Q Rxb8 65.Re1 Rd3+ 66.Kc4 h1Q 67.Re5+ >>Kxe5 68.Kxd3 Qd1+ 69.Kc3 Rb3+ 70.Kc4 Qc2# >> >>15961 seconds,292,407,791 nodes >> >>In the game Deep Junior7 missed the right move(Rg3) but it did not help Tao that >>resigned after Rxb7. >> >>How much time does your program need to see mate in 10 with the full 5 piece >>tablebases and without tablebases? > >Here is the CM8000 verbose explanation: >"Analysis: You move your rook to g3, which moves it behind the passed pawn at >g2. White counters with rook to d1. Your rook captures pawn, which removes the >promote threat at b7. White responds by moving rook to d5, which checks your >king. You move your king to e4, which moves it out of check. White counters by >moving the rook to d4, which checks your king. You move your king to e5, which >moves it out of check. White responds by moving rook to d5, which checks your >king. You move your king to e6, which moves it out of check. White replies by >moving the rook to d1. You move your rook to c7, which checks White's king. >White responds with the king to b4, which moves it out of check. You move your >pawn to g1 with a queen promotion, which threatens White's rook. White counters >with rook captures queen. Your rook captures rook. White responds by moving king >to a3. You move your pawn to h3, which pushes the passed pawn. White responds by >moving the king to a4. You move your pawn to h2, which adds a promote threat at >h2. White counters by moving the king to a5. You move your pawn to h1 with a >queen promotion. > >As a result of this line of play, you win a rook and a pawn. Additionally, you >gain a queen through promotion. Also, White's King is driven away from the >middle of the board. With this material, you should be able to force a mate." > >Here is the SAN output for CM8000: >Time Depth Score Positions Moves >9:09 10/11 -20.85 91605523 1...Rg3 2. Rd1 Rxb7 3. Rd5+ Ke4 4. Rd4+ Ke5 5. Rd5+ >Ke6 6. Rd1 Rc7+ 7. Kb4 g1=Q 8. Rxg1 Rxg1 9. Ka3 h3 10. Ka4 h2 11. Ka5 h1=Q Very amusing that you put the text analysis in there. I don't think I've ever seen anybody else bother to do that on this board. Here's what I got with CM8000 on a PIII-733 (default personality, 32MB hash) Time Depth Score Positions Moves 0:00 3/4 -11.28 3940 1...Rg3 2. Kd4 h3 3. b8=Q Rxb8 0:00 4/5 -11.60 14839 1...Rg3 2. Kc5 h3 3. Kd4 Rb4+ 4. Kd5 Rxb7 0:00 5/6 -11.79 38085 1...Rg3 2. Kc5 h3 3. Kd4 Rb4+ 4. Kc5 Rxb7 5. Kd4 0:02 6/7 -13.99 149165 1...Rg3 2. Rxg2 Rgxg2 3. Kd5 h3 4. Kd4 h2 5. b8=Q Rg4+ 6. Ke3 Rxb8 0:04 7/8 -14.23 418052 1...Rg3 2. Rxg2 Rgxg2 3. Kd5 Rgd2+ 4. Kc6 h3 5. Kc5 Rxb7 0:15 8/9 -15.92 1834376 1...Rg3 2. Rxg2 Rgxg2 3. Kd5 h3 4. b8=Q Rxb8 5. Kc6 h2 6. Kc7 Rg7+ 7. Kxb8 h1=Q 1:44 9/10 -18.15 12919471 1...Rg3 2. Rd1 Rxb7 3. Rd5+ Ke4 4. Rd4+ Ke5 5. Rd5+ Kf6 6. Rd1 h3 7. Kc5 h2 8. Kc6 h1=Q 9. Rd6+ Ke5 4:54 10/11 -20.83 35997947 1...Rg3 2. Rd1 g1=Q 3. Rxg1 Rxg1 4. b8=Q Rxb8 5. Kd4 h3 6. Kc5 Rc1+ 7. Kd4 h2 8. Ke3 Re8+ 9. Kd4 h1=Q 28:16 11/12 -Mate11 202470478 1...Rg3 2. b8=Q Rxb8 3. Kc5 h3 4. Kd5 h2 5. Re1 g1=Q 6. Re5+ Kg6 7. Re6+ Kf7 8. Kc4 Qc1+ 9. Kd4 Qc3+ 10. Kd5 h1=Q+ 11. Kd6 Rd3# At least it chose the right move the whole time.... jm
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.