MESON Chess Problem Database

Problem Display
PID: 22227 (7k/8/Q3qR1K/5bR1/8/8/8/8 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

6th Place, Edorove, 1990

7k/8/Q3qR1K/5bR1/8/8/8/8

#2

4 + 3

2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.Rf8#
    • 1...Qe1
      • 2.Rf8#
    • 1...Qe2
      • 2.Rf8#
    • 1...Qe3
      • 2.Rf8#
    • 1...Qe4
      • 2.Rf8#
    • 1...Qe5
      • 2.Rf8#
    • 1...Qxf6+
      • 2.Qxf6#
  • Tries
    • 1.Rxe6?
      • threat
        • 2.Re8#
        • 2.Qc8#
        • 2.Qa1#
        • 2.Qa8#
      • 1...Bxe6
        • 2.Qa1#
      • 1...Be4
        • 2.Re8#
        • 2.Qc8#
        • 2.Qa1#
      • 1...Bh7
        • 2.Qa1#
      • 1...Bg6!
    • 1.Qc8+?
      • 1...Qg8
        • 2.Rxg8#
        • 2.Qxg8#
      • 1...Qe8
        • 2.Qxe8#
      • 1...Qxc8!
    • 1.Qa8+?
      • 1...Qg8
        • 2.Rxg8#
        • 2.Qxg8#
      • 1...Qe8
        • 2.Qxe8#
      • 1...Qc8!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Rxe6#
      • 1...Qxf6+
        • 2.Qxf6#
      • 1...Bg6
        • 2.Rf8#
      • 1...Qa2
        • 2.Rf8#
      • 1...Qb3
        • 2.Rf8#
      • 1...Qc4
        • 2.Rf8#
      • 1...Qd5
        • 2.Rf8#
      • 1...Qd7
        • 2.Rf8#
      • 1...Qf7
        • 2.Rxf7#
      • 1...Qc8
        • 2.Rc6#
        • 2.Rf8#
      • 1...Qg8
        • 2.Rf8#
      • 1...Qe1
        • 2.Rf8#
      • 1...Qe2
        • 2.Rf8#
      • 1...Qe3
        • 2.Rf8#
      • 1...Qe4
        • 2.Rf8#
      • 1...Qe5
        • 2.Rf8#
      • 1...Qa6
        • 2.Rxa6#
      • 1...Qb6
        • 2.Rxb6#
      • 1...Qc6
        • 2.Rxc6#
      • 1...Qd6
        • 2.Rxd6#
      • 1...Qe7
        • 2.Rf8#
      • 1...Qe8
        • 2.Re6#
        • 2.Rf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_PINR(C)::R(C)
    • Q(b);N_PINR(C),P_PINR(A)::R(C)
    • Q(b);CHECK,OGATE,XR(C)::QAB(B),XQ(b)
  • Tries
    • Try
      • R(C);N_SPINR(C),XQ(b)
      • Threat
        • DUALS(4)
      • Vars
        • B(a);XR(C)::QAB(B)
        • B(a);::QAB(B)
      • Refutation
        • B(a);
    • Try
      • Q(B);CHECK
      • Vars
        • Q(b);N_GUARD,N_PINR(C),P_SPINQ(b)::QAR(B),XQ(b)
      • Refutation
        • Q(b);N_PINR(C),XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • Q(b);N_GUARD,N_PINR(C),P_SPINQ(b)::QAR(B),XQ(b)
      • Refutation
        • Q(b);N_PINR(C),P_SPINQ(b)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+R(C),XQ(b)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XR(C)::QAB(B),XQ(b)
      • B(a);N_PINR(C)::QAB(B)+R(C),DCHECK
      • Q(b);N_PINR(C)::QAB(B)+R(C),DCHECK
      • Q(b);N_PINR(C)::QAB(B)+R(C),XQ(b)
      • Q(b);N_PINR(C)::QAB(B)+R(C)
      • Q(b);N_PINR(C),P_PINR(A)::QAB(B)+R(C),DCHECK
      • Q(b);N_PINR(C)::R(C)
      • Q(b);::QAB(B)+R(C),XQ(b)
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