MESON Chess Problem Database

Problem Display
PID: 172300 (2K4k/6RP/5B1q/8/8/8/5Q2/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

2K4k/6RP/5B1q/8/8/8/5Q2/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1+
      • 2.Rc7#
    • 1...Qd2
      • 2.Ra7#
      • 2.Rb7#
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
    • 1...Qe3
      • 2.Ra7#
      • 2.Rb7#
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
    • 1...Qh1
      • 2.Ra7#
      • 2.Rb7#
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
    • 1...Qh2
      • 2.Ra7#
      • 2.Rb7#
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
    • 1...Qh3+
      • 2.Rd7#
    • 1...Qh5
      • 2.Ra7#
      • 2.Rb7#
      • 2.Rc7#
      • 2.Rd7#
      • 2.Re7#
      • 2.Rf7#
  • Tries
    • 1.Ra7+?
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qg7!
    • 1.Rb7+?
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qg7!
    • 1.Rc7+?
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qg7!
    • 1.Rd7+?
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qg7!
    • 1.Re7+?
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qg7!
    • 1.Rf7+?
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qg7!
    • 1.Qa7?
      • threat
        • 2.Rg8#
      • 1...Qc1+
        • 2.Rc7#
      • 1...Qh3+
        • 2.Rg4#
        • 2.Rd7#
      • 1...Qxg7
        • 2.Qxg7#
      • 1...Qxh7!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qg8#
      • 1...Qc1+
        • 2.Rc7#
      • 1...Qh3+
        • 2.Rd7#
      • 1...Qxh7
        • 2.Rg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,N_GUARD::B(B)+R(C)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • Q(a);OGATE,XB(B)::QAB(A),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(C);CHECK
      • Vars
        • Q(a);OGATE,XB(B)::QAB(A),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(C);CHECK
      • Vars
        • Q(a);OGATE,XB(B)::QAB(A),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(C);CHECK
      • Vars
        • Q(a);OGATE,XB(B)::QAB(A),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(C);CHECK
      • Vars
        • Q(a);OGATE,XB(B)::QAB(A),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(C);CHECK
      • Vars
        • Q(a);OGATE,XB(B)::QAB(A),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • Q(A);
      • Threat
        • B(B)+R(C),DCHECK
      • Vars
        • Q(a);CHECK,N_GUARD::B(B)+R(C)
        • Q(a);OGATE,P_SPINQ(a),XR(C)::QAB1(A),XQ(a)
      • Refutation
        • Q(a);XP(D)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • Q(a);CHECK,N_GUARD::B(B)+R(C)
      • Q(a);SBLOCK,XP(D)::B(B)+R(C),DCHECK
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