Meson Chess Problem Database

Schrader, Megchiel

Match: Netherlands - Poland, 1990

10 + 12

6490	yacpdb	2009

Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 8
Sets
- K(h);N_SPINP(i),P_SPINB(b),S_FLIGHT::B(I),XP(k)
- B(b);OGATE::QAR1(A),XP(g)
- B(b);N_SPINP(i),OGATE::QAR1(A),XP(g)
- S(j);::B(I),XP(k)
- S(j);N_SPINP(i)::B(I),XP(k)
- P(g);OGATEB,SBLOCK::R(E)
- P(k);N_SPINP(i)::P=Q
Tries
- Try
  - S(J);CHECK
  - Refutation
    - K(h);P-FLIGHT
- Try
  - R(D);CHECK,XP(i)
  - Vars
    - S(j);P_SPINS(j)::B(I),XP(k)
    - P(k);S_CUTB(b),S_CUTS(f),S_CUTS(j),XR(D)::P=Q
    - P(k);P_SPINP(k),S_CUTB(b),S_CUTS(f),S_CUTS(j)::P=Q
  - Refutation
    - S(f);P_SPINS(f)
- Try
  - Q(A);CHECK
  - Vars
    - P(g);N_SPINP(i),P_SPINP(g),S_CUTP(c)::R(E)
  - Refutation
    - P(c);XQ(A)
- Try
  - Q(A);CHECK
  - Vars
    - P(g);N_SPINP(i),P_SPINP(g),S_CUTP(d)::R(E)
  - Refutation
    - P(d);N_SPINP(i),P_SPINP(d)
- Try
  - Q(A);XB(b)
  - Threat
    - DUALS(2)
  - Vars
    - S(j);::QAR1(A),XP(g)
  - Refutation
    - P(d);XQ(A)
Actual
- S(F);
- Threat
  - QAB1(A),XP(e)
- Vars
  - K(h);P-FLIGHT::QAR1(A),XP(e)
  - P(g);OGATEB::R(E)
  - B(b);N_SPINP(i),OGATE,SBLOCK::QAB1(A)
  - S(f);N_GUARD,N_SPINP(i),SBLOCK,S_CUTB(b)::S(J),XP(l)
  - S(j);N_SPINP(i),SBLOCK::S(J)
  - P(k);N_SPINP(i),SBLOCK::P=Q

MESON Chess Problem Database