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Outpost evaluation

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Ferdinand Mosca

Joined: 10 Aug 2008
Posts: 451
Location: Philippines

Post subject: Re: Outpost evaluation Posted: Sat Apr 14, 2012 1:34 am

gleperlier wrote:

Hi,

So an idea could be :

#define KNIGHT_OUTPOST_BONUS 10

#0. Bonus only if defended by one pawn
#1. Extra bonus if defended by 2 pawns +10
#2. Don't bonus when the opponent has less than 5 pawns -10
#3. Extra bonus if the knight blocks a pawn of the opponent +10
#4. Extra bonus if the Knight is on half-open file +10

Would someone be very nice and post here a code that can be copy/past in Tom Kerrigan's Simple Chess Program (TSCP) eval ? or send me by pm ?

Cheers,

Gab

Try this out for a start, basic knight not attacked by enemy pawn and knight protected by friendly pawn, note this is only for white, you take care for the black Smile

Code:

case KNIGHT:
            score[LIGHT] += knight_pcsq[i];

            //knight outpost for white
            //consider only if it is located inside rank 4 to 6 and file b to g (std board)
            if(COL(i) >= 1 && COL(i) <= 6 && ROW(i) <= 4 && ROW(i) >= 2){
               //if square i is not attacked by enemy pawn
               if(piece[i-9] != PAWN || color[i-9] != DARK){
                  if(piece[i-7] != PAWN || color[i-7] != DARK){

                     //visual debug
                     //print_board();
                     //printf("square %d, is not attacked by enemy pawn\n", i);

                     score[LIGHT] += 4;

                     //add bonus if this knight is protected by friendly pawn
                     //left pawn
                     if(piece[i+7] == PAWN && color[i+7] == LIGHT){
                        score[LIGHT] += 2;
                        //visual debug
                     }
                     //right pawn
                     if(piece[i+9] == PAWN && color[i+9] == LIGHT){
                        score[LIGHT] += 2;
                        //visual debug
                     }
                  }
               }
            }

            break;

Display posts from previous:

Subject	Author	Date/Time
Outpost evaluation	Lucas Braesch	Sun Mar 18, 2012 10:42 am
Re: Outpost evaluation	Ed Schroder	Sun Mar 18, 2012 12:15 pm
Re: Outpost evaluation	Lucas Braesch	Sun Mar 18, 2012 1:47 pm
Re: Outpost evaluation	Matthew R. Brades	Sun Mar 18, 2012 4:27 pm
Re: Outpost evaluation	John Merlino	Sun Mar 18, 2012 4:44 pm
Re: Outpost evaluation	Matthew R. Brades	Sun Mar 18, 2012 5:54 pm
Re: Outpost evaluation	Charles Roberson	Sun Mar 18, 2012 8:07 pm
Re: Outpost evaluation	Pio Korinth	Sun Mar 18, 2012 7:38 pm
Re: Outpost evaluation	Michael Hoffmann	Sun Mar 18, 2012 8:35 pm
Re: Outpost evaluation	Pio Korinth	Sun Mar 18, 2012 9:30 pm
Re: Outpost evaluation	Pawel Koziol	Sun Mar 18, 2012 10:29 pm
Re: Outpost evaluation	Ed Schroder	Mon Mar 19, 2012 12:20 pm
Re: Outpost evaluation	Robert Purves	Tue Mar 20, 2012 7:14 am
Re: Outpost evaluation	Gabriel LEPERLIER	Fri Apr 13, 2012 8:00 pm
Re: Outpost evaluation	Ferdinand Mosca	Sat Apr 14, 2012 1:34 am
Re: Outpost evaluation	Gabriel LEPERLIER	Sat Apr 14, 2012 7:24 am
Re: Outpost evaluation	Lucas Braesch	Sat Apr 14, 2012 2:28 pm
Re: Outpost evaluation	Ferdinand Mosca	Sat Apr 14, 2012 4:34 pm
Re: Outpost evaluation	Robert Hyatt	Sat Apr 14, 2012 4:16 am

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