Meson Chess Problem Database

Froberg, Johan Hilding Laurentius

Thema Danicum, 1994

11 + 11

15148	Sadier Collection	2021

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 6
Sets
- R(b);P_SPINS(d)::R1(G)
- R(b);P_SPINS(d),XP(B)::R1(G)
- S(d);N_GUARD,P_SPINR(b)::R1(G),XS(d)
- S(f);N_GUARD::B(H),XS(f)
- S(f);N_GUARD::B(H)
Tries
- Try
  - S(I);XQ(h)
  - Threat
    - DUALS(2)
  - Refutation
    - P(j);P_SPINP(j),XS(I)
- Try
  - S(I);
  - Threat
    - S(I)
  - Vars
    - R(b);P_SPINS(d),XP(B)::R1(G)
  - Refutation
    - Q(h);N_SPINQ(h),XR(F)
- Try
  - R(F);CHECK,XQ(h)
  - Refutation
    - P(j);XR(F)
- Try
  - R(G);CHECK,N_PINQ(h),P_SPINB(H)
  - Vars
    - S(d);P_SPINR(b),XR(G)::S(D),XP(i)
  - Refutation
    - Q(h);N_PINB(H),P_SPINQ(h),XR(G)
- Try
  - Q(A);P_PINS(d),XR(b)
  - Threat
    - DUALS(3)
  - Vars
    - R(a);XS(D)::QAR2(A)
    - S(f);N_GUARD,N_SPINS(d),XQ(A)::B(H)
    - P(c);::R1(G)
  - Refutation
    - R(a);N_SPINS(d),XQ(A)
- Try
  - Q(A);
  - Threat
    - QAR1(A)
  - Vars
    - S(d);N_GUARD::R1(G)
    - S(f);N_GUARD::B(H),XS(f)
  - Refutation
    - R(b);XP(B)
- Try
  - P(C);CHECK,XS(d)
  - Vars
    - S(f);SBLOCK,XP(C)::B(H)
  - Refutation
    - K(g);N_SPINQ(h),P_SPINR(b),S_FLIGHT,XP(C)
Actual
- R(G);P_SPINB(H),P_SPINR(G),XP(i)
- Threat
  - B(H)
- Vars
  - R(b);CHECK,P_SPINS(d),XR(G)::S(D),XR(b)
  - R(b);N_PINR(G),P_SPINS(d),XP(B)::R1(G)
  - S(d);P_SPINR(b),XR(G)::S(D),XS(d)
  - S(d);N_SPINQ(h),P_SPINR(b)::R(G)

MESON Chess Problem Database