Meson Chess Problem Database

Niemeijer, Meindert

Sp. HM., 8. American Chess Congress, 1921

13 + 10

56	The Problemist	2013

This is a version

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 4
Sets
- R(f);N_GUARD,N_SPINS(d),S_CUTB(h)::R(G)+P(H),XS(d)
- R(f);N_GUARD::S(M),XR(f)
- R(f);S_CUTB(h)::QAB(J)
- B(h);N_SPINS(d),S_CUTR(f)::S(M)
- B(h);S_CUTR(f)::S(M),XS(g)
- S(g);N_GUARD::B(K),XS(d)
- S(g);N_GUARD,XS(M)::B(K),XS(d)
Tries
- Try
  - B(K);
  - Threat
    - DUALS(2)
  - Vars
    - R(f);N_GUARD,N_SPINS(d),XB(K)::R(G)+P(H),XS(d)
    - B(h);N_SPINS(d),XB(K)::S(M)
    - S(g);N_GUARD,XS(M)::B(K),XS(d)
    - Q(j);::S(M)
    - Q(j);::S(M),XS(g)
  - Refutation
    - B(h);XS(M)
- Try
  - R(G);
  - Threat
    - R(G)+P(H),XS(d)
  - Vars
    - B(h);OGATE::R(G)+P(H),XB(h)
  - Refutation
    - R(f);
- Try
  - R(G);XR(f)
  - Threat
    - DUALS(2)
  - Vars
    - S(g);N_GUARD,XS(M)::B(K),XS(d)
    - Q(j);::S(M)
    - Q(j);::S(M),XS(g)
    - B(h);N_SPINS(d)::S(M)
  - Refutation
    - B(h);XS(M)
- Try
  - Q(J);CHECK
  - Vars
    - S(g);XQ(J)::B(K),XS(d)
  - Refutation
    - B(h);P_SPINB(h)
- Try
  - P(H);CHECK,XS(d)
  - Refutation
    - B(h);XR(G)
Actual
- R(L);P_PINP(e)
- Threat
  - QAR1(J)
- Vars
  - R(f);N_GUARD,N_SPINS(d),S_CUTB(h)::R(G)+P(H),XS(d)
  - R(f);N_SPINP(e),S_CUTB(h)::QAB(J)
  - B(h);N_SPINS(d),S_CUTR(f)::S(M)
  - B(h);N_SPINP(e),S_CUTR(f)::S(M),XS(g)
  - S(g);N_GUARD::B(K),XS(d)

MESON Chess Problem Database