MESON Chess Problem Database

Problem Display
PID: 63098 (KB6/1p1N1Q1B/p2R3P/q5pR/4P1k1/1r4P1/8/b2nnN2 w - - 0 1)

Lukyanov, Valentin Volodimirovich

2/3 Prize, Shakhmaty, 1973

KB6/1p1N1Q1B/p2R3P/q5pR/4P1k1/1r4P1/8/b2nnN2

#2

11 + 9

3753 FIDE Album (1971-1973) 1978

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg3
      • 2.Sh2#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Sh2#
      • 1...Qd2
        • 2.Se5#
      • 1...Qa2
        • 2.Se5#
      • 1...Qe5
        • 2.Sxe5#
      • 1...Rb2
        • 2.e5#
      • 1...Sf3
        • 2.Sf6#
      • 1...Qc7!
    • 1.Rd5?
      • threat
        • 2.Sh2#
      • 1...Qc7
        • 2.Rdxg5#
      • 1...Qa2
        • 2.Rdxg5#
      • 1...Rb2
        • 2.Se5#
      • 1...Be5
        • 2.Sxe5#
      • 1...Sf3
        • 2.Bf5#
      • 1...Qd2!
    • 1.Qf5+?
      • 1...Kxh5
        • 2.Qh3#
      • 1...Qxf5!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Sh2#
      • 1...Qd2
        • 2.Bf5#
      • 1...Qa2
        • 2.Bf5#
      • 1...Rb2
        • 2.Sf6#
      • 1...Sf3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(d);SBLOCK,XP(B)::S(A)
  • Tries
    • Try
      • R(E);
      • Threat
        • S(A)
      • Vars
        • Q(f);N_GUARD::S(G)
        • Q(f);N_GUARD::S(G),XQ(f)
        • R(d);S_CUTB(a)::R(E)+P(C)
        • S(c);SBLOCK::S(G)
      • Refutation
        • Q(f);
    • Try
      • R(E);
      • Threat
        • S(A)
      • Vars
        • Q(f);N_GUARD::R1(E),XP(g)
        • R(d);S_CUTB(a)::S(G)
        • B(a);N_GUARD::S(G),XB(a)
        • S(c);SBLOCK::B(I)
      • Refutation
        • Q(f);
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);OGATE,P_SPINP(g),S_FLIGHT,XR(D)::QAR2(H)
      • Refutation
        • Q(f);XQ(H)
  • Actual
    • R(E);
    • Threat
      • S(A)
    • Vars
      • Q(f);N_GUARD::B(I)
      • R(d);S_CUTB(a)::S(G)
      • S(c);N_GUARD::QAB1(H),XS(c)
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