MESON Chess Problem Database

Problem Display
PID: 246107 (r6k/8/6RK/1n6/2n5/8/8/6Q1 w - - 0 1)

Zinoviev, Nikolai

Smena (Moscow), 1994

r6k/8/6RK/1n6/2n5/8/8/6Q1

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rg8#
    • 1...Ra2
      • 2.Rg8#
    • 1...Ra3
      • 2.Rg8#
    • 1...Ra4
      • 2.Rg8#
    • 1...Ra5
      • 2.Rg8#
    • 1...Ra7
      • 2.Rg8#
    • 1...Rg8
      • 2.Rxg8#
  • Tries
    • 1.Rb6?
      • threat
        • 2.Qg7#
      • 1...Ra7
        • 2.Rb8#
      • 1...Rg8!
    • 1.Rc6?
      • threat
        • 2.Qg7#
      • 1...Ra7
        • 2.Rc8#
      • 1...Rg8!
    • 1.Rd6?
      • threat
        • 2.Qg7#
      • 1...Ra7
        • 2.Rd8#
      • 1...Rg8!
    • 1.Re6?
      • threat
        • 2.Qg7#
      • 1...Ra7
        • 2.Re8#
      • 1...Rg8!
    • 1.Rf6?
      • threat
        • 2.Qg7#
      • 1...Ra7
        • 2.Rf8#
      • 1...Rg8!
    • 1.Rg7?
      • threat
        • 2.Rh7#
      • 1...Ra7
        • 2.Rg8#
      • 1...Ra6+!
    • 1.Qf2?
      • threat
        • 2.Qf6#
      • 1...Ra6
        • 2.Qf8#
      • 1...Ra7
        • 2.Qf8#
      • 1...Rf8
        • 2.Qxf8#
      • 1...Rg8!
    • 1.Qd4+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Sxd4!
    • 1.Qa1+?
      • 1...Sb2
        • 2.Qxa8#
      • 1...Se5
        • 2.Qxe5#
        • 2.Qxa8#
      • 1...Sc3
        • 2.Qxa8#
      • 1...Sd4
        • 2.Qxa8#
      • 1...Rxa1!
    • 1.Qf1?
      • threat
        • 2.Qf6#
      • 1...Ra6
        • 2.Qf8#
      • 1...Ra7
        • 2.Qf8#
      • 1...Rf8
        • 2.Qxf8#
      • 1...Rg8!
    • 1.Qg5?
      • threat
        • 2.Qf6#
      • 1...Rg8
        • 2.Rxg8#
      • 1...Ra6
        • 2.Qd8#
      • 1...Ra7
        • 2.Rg8#
        • 2.Qd8#
      • 1...Rf8!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Kg5#
      • 1...Ra2
        • 2.Qb8#
      • 1...Ra3
        • 2.Qb8#
      • 1...Ra7
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::R1(B)
    • R(c);N_GUARD::R1(B),XR(c)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAB1(A)
      • Vars
        • R(c);N_GUARD::R(B)
      • Refutation
        • R(c);
    • Try
      • R(B);
      • Threat
        • QAB1(A)
      • Vars
        • R(c);N_GUARD::R(B)
      • Refutation
        • R(c);
    • Try
      • R(B);
      • Threat
        • QAB1(A)
      • Vars
        • R(c);N_GUARD::R(B)
      • Refutation
        • R(c);
    • Try
      • R(B);
      • Threat
        • QAB1(A)
      • Vars
        • R(c);N_GUARD::R(B)
      • Refutation
        • R(c);
    • Try
      • R(B);
      • Threat
        • QAB1(A)
      • Vars
        • R(c);N_GUARD::R(B)
      • Refutation
        • R(c);
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • R(c);N_GUARD::R1(B)
      • Refutation
        • R(c);CHECK
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • R(c);N_GUARD,P_PINR(B)::QAR2(A)
        • R(c);N_GUARD::QAR2(A)
        • R(c);N_GUARD::QAR2(A),XR(c)
      • Refutation
        • R(c);
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(A),XS(a)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);P_SPINS(a)::QAB1(A),XR(c)
        • S(b);P_SPINS(b)::QAB1(A),XR(c)
      • Refutation
        • R(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • R(c);N_GUARD,P_PINR(B)::QAR2(A)
        • R(c);N_GUARD::QAR2(A)
        • R(c);N_GUARD::QAR2(A),XR(c)
      • Refutation
        • R(c);
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • R(c);N_GUARD::R1(B),XR(c)
        • R(c);N_GUARD,P_PINR(B)::QAR(A)
      • Refutation
        • R(c);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+K(C)
    • Vars
      • R(c);N_GUARD::QAR(A)
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