double GeometricRandomPlayout::eval(board b){
int steps =1;
std::uniform_real_distribution<double> unif(0, 1);
while(!b.is_ended() && unif(rng)<(1.0/steps++) ){
zet z= select_random_move(b);
b=b+z;
}
return state_value(b);
}
double GeometricRandomPlayout::state_value(board& b){
if (b.black_has_won()){
return 1.0;
}
if (b.white_has_won()){
return 0.0;
}
if (b.is_ended()){
return 0.5;
}
double hval = h.evaluate(b);
return (1/(1+exp(-hval)));
}