Meson Chess Problem Database

Melnichenko, Viktor Oleksandrovich

Rudenko, Valentin Fedorovich

2nd Prize, Birnov MT, 1981

10 + 11

3752	FIDE Album (1980-1982)	1988

Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 2
- REMOVED MATES = 9
Sets
- K(g);P-FLIGHT,XP(C)::S(E),XP(j)
- Q(b);N_GUARD::R(D)+S(E)
- R(a);S_CUTQ(b)::R(D)+S(E)
- R(a);SBLOCK,XP(C)::R(D)+S(E)
- S(c);S_CUTQ(b)::R(D)+S(E)
- S(k);::QAR1(H)
- P(i);OGATE,P_SPINP(i),XS(E)::QAR1(H),XP(i)
Tries
- Try
  - S(E);CHECK,XP(j)
  - Vars
    - K(g);OGATE,S_FLIGHT,XS(E)::R1(D)
  - Refutation
    - Q(b);XR(D)
- Try
  - S(E);CHECK
  - Vars
    - Q(b);XR(D)::QAR1(H)
  - Refutation
    - K(g);P-FLIGHT,XP(C)
- Try
  - B(I);XS(k)
  - Threat
    - QAR1(H)
  - Vars
    - K(g);P-FLIGHT,XP(C)::S(E),XP(j)
    - S(c);S_CUTQ(b)::R(D)+S(E)
  - Refutation
    - S(c);
- Try
  - B(J);CHECK
  - Vars
    - K(g);P-FLIGHT,XP(C)::S(E),XP(j)
    - S(k);XB(J)::QAR1(H)
  - Refutation
    - K(g);S_FLIGHT,XB(J)
- Try
  - Q(H);
  - Threat
    - QAR1(H)
  - Vars
    - P(j);::QAR1(H),XP(j)
    - S(c);S_CUTQ(b)::R(D)+S(E)
  - Refutation
    - R(a);XP(C)
- Try
  - Q(H);
  - Threat
    - QAR1(H)
  - Vars
    - R(a);SBLOCK,XP(C)::R(D)+S(E)
    - P(j);::QAR1(H),XP(j)
    - S(c);S_CUTQ(b)::R(D)+S(E)
  - Refutation
    - P(h);XQ(H)
- Try
  - P(G);CHECK
  - Refutation
    - B(f);XQ(G)
- Try
  - P(G);CHECK
  - Vars
    - S(k);P_SPINS(k)::QAR1(H)
  - Refutation
    - B(f);XR(G)
Actual
- Q(H);
- Threat
  - QAR1(H)
- Vars
  - K(g);P-FLIGHT,P_SPINP(j),P_SPINS(k)::S(E),XP(d)
  - R(a);SBLOCK,XP(C)::QAB1(H),XP(j)
  - S(c);S_CUTQ(b)::R(D)+S(E)
  - S(k);::R(D)+S(E)
  - S(k);::S(A)
  - P(j);::QAR1(H),XP(j)

MESON Chess Problem Database