MESON Chess Problem Database

Problem Display
PID: 12244 (4n2K/3r3p/bbN2N2/4p2q/5p1p/R2PkP1R/1Q6/4r3 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Rudenko, Valentin Fedorovich

11th Place, USSR, 1976

4n2K/3r3p/bbN2N2/4p2q/5p1p/R2PkP1R/1Q6/4r3

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf3
      • 2.Sg4#
    • 1...Qg4
      • 2.Sxg4#
    • 1...Qf7
      • 2.Sg4#
    • 1...Qh6
      • 2.Sg4#
    • 1...Rxd3
      • 2.Sd5#
    • 1...Rd5
      • 2.Sxd5#
    • 1...Ra7
      • 2.Sd5#
    • 1...Rb7
      • 2.Sd5#
    • 1...Rc7
      • 2.Sd5#
    • 1...Re7
      • 2.Sd5#
    • 1...Rf7
      • 2.Sd5#
    • 1...Rg7
      • 2.Sd5#
    • 1...Bb7
      • 2.d4#
    • 1...Bc8
      • 2.d4#
    • 1...Sd6
      • 2.Sd5#
  • Tries
    • 1.Se4?
      • threat
        • 2.Qd2#
        • 2.Qf2#
      • 1...Rd1
        • 2.Qf2#
      • 1...Rf1
        • 2.Qd2#
      • 1...Ba5
        • 2.Qf2#
      • 1...Re2!
    • 1.Ra2?
      • threat
        • 2.Qd2#
      • 1...Kxd3
        • 2.Qb3#
      • 1...Rxd3
        • 2.Qf2#
      • 1...Re2
        • 2.Qxe2#
      • 1...Rd1
        • 2.Qe2#
      • 1...Ba5!
  • Keys
    • 1.Rh2!
      • threat
        • 2.Qf2#
      • 1...Kxf3
        • 2.Rh3#
      • 1...Qxf3
        • 2.Qd2#
      • 1...Rf1
        • 2.Qe2#
      • 1...Re2
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 14
  • Sets
    • Q(f);N_GUARD,P_SPINQ(f),XP(D)::S(G)
    • Q(f);N_GUARD::S(G),XQ(f)
    • Q(f);N_GUARD::S(G)
    • R(i);N_GUARD,P_SPINR(i),XP(C)::S(G)
    • R(i);N_GUARD::S(G),XR(i)
    • R(i);N_GUARD::S(G)
    • B(g);N_GUARD::R(B)+P(C)
    • S(k);S_CUTR(i)::S(G)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::QAB1(A)
        • B(h);::QAB1(A)
      • Refutation
        • R(a);
    • Try
      • R(B);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR2(A)
        • R(i);SBLOCK,XP(C)::QAB1(A)
        • R(a);N_GUARD::QAR1(A),XR(a)
        • R(a);N_GUARD::QAR1(A)
      • Refutation
        • B(h);
  • Actual
    • R(E);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(D)::R(E)
      • Q(f);SBLOCK,XP(D)::QAB1(A)
      • R(a);N_GUARD::QAR1(A)
      • R(a);N_GUARD::QAR1(A),XR(a)
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