Meson Chess Problem Database

Lider, Valentin Viktorovich

Comm., Het Parool, 1973

13 + 7

6490	yacpdb	2018

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 1
Sets
- P(a);OGATE,P_SPINP(a),XS(E)::B(B),XP(a)
- P(c);N_GUARD::QAR2(M)
- P(d);OGATEB,XP(I)::QAR2(M)
- P(e);SBLOCK::QAB(M),XP(g)
Tries
- Try
  - R(A);
  - Threat
    - DUALS(2)
  - Vars
    - S(f);XP(J)::QAB1(M)
    - P(a);::QAB1(M)
    - S(f);::QAB1(M)
  - Refutation
    - P(a);P_SPINP(a),XS(E)
- Try
  - Q(M);
  - Threat
    - QAB1(M)
  - Vars
    - P(a);OGATE,P_SPINP(a),XS(E)::B(B),XP(a)
    - P(d);OGATEB,XP(I)::QAR2(M)
  - Refutation
    - P(a);
- Try
  - P(D);
  - Threat
    - DUALS(2)
  - Vars
    - S(f);XP(J)::QAB1(M)
    - P(a);P_SPINP(a),XS(E)::QAB1(M)
    - P(c);OGATE,XP(D)::QAR2(M),XP(c)
    - P(d);XP(I)::QAB1(M)
    - P(a);::QAB1(M)
    - S(f);::QAB1(M)
  - Refutation
    - K(b);S_FLIGHT
- Try
  - P(J);
  - Vars
    - P(a);OGATE,P_SPINP(a),XS(E)::B(B),XP(a)
    - P(d);OGATEB,P_SPINP(d),XP(I)::QAR2(M)
    - P(a);::B(B)+S(E)
    - S(f);OGATE::R(K)+P(I),XS(f)
    - S(f);N_GUARD::R(K)+P(I)
    - P(c);N_GUARD::QAR2(M)
    - P(e);SBLOCK::QAB(M),XP(g)
  - Refutation
    - S(f);
Actual
- P(I);
- Vars
  - S(f);OGATE,P_SPINS(f),XP(J)::R(K),XS(f)
  - P(a);OGATE,P_SPINP(a),XS(E)::B(B),XP(a)
  - P(a);::B(B)+S(E)
  - S(f);OGATE::R(K)+P(J),XS(f)
  - S(f);N_GUARD::R(K)+P(J)
  - P(c);N_GUARD::QAR2(M)
  - P(e);SBLOCK::QAR2(M)

MESON Chess Problem Database