Micro-Max (chess engine)

Micro-Max (µ-Max) is a chess engine developed by Dutch H.G. Muller, born in 1956. The program is written in C and according to IOCCC rules it is 1088 characters, not counting ; { } nor leading spaces and line feeds. The author claims that it is the smallest non-trivial chess engine in existence.

The source code for Micro-Max and other chess variant engines is available.^[2]

Versions

• Micro-Max Micro (1180 characters)^[3]
• Micro-Max 1.6 (1433 characters)
• Micro-Max 3.2 (2000 characters)
• Micro-Max 4.0 (1752 characters)
• Micro-Max 4.4 (1865 characters)
• Micro-Max 4.8 (1953 characters)^[4]

Source code sample

main()
{
 int k=8,*p,c[9],d;
 
 F(X,0,8)
 {b[X+V]=(b[X]+=16)-8;b[X+16]=18;b[X+96]=9;
  F(Y,0,8)b[16*Y+X+8]=(X-4)*(X-4)+(Y-3.5)*(Y-3.5);
 }
 
 W(1)
 {F(N,0,121)printf(" %c",N&8&&(N+=7)?10:n[b[N]&15]);
  p=c;W((*p++=getchar())>10);
  if(*c-10){X=*c-16*c[1]+C;Y=c[2]-16*c[3]+C;}else
  {d=6;N=0;W(N<1e6)D(k,-I,I,Q,8,d++);}
  if(D(k,-I,I,Q,9,2)==I)k^=24;
 }
}

References

External links

• Official Micro-Max Homepage
• H.G. Muller Chess Site
• Chess Programming Wiki