MESON Chess Problem Database

Problem Display
PID: 140158 (Q7/1R1R4/3np3/8/N2k2K1/P2p4/8/7B w - - 0 1)

van Wageningen, R

Probleemblad, 1975

Q7/1R1R4/3np3/8/N2k2K1/P2p4/8/7B

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Rb4#
    • 1...Ke5
      • 2.Qh8#
  • Tries
    • 1.Rb1?
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Rb4#
      • 1...Ke5
        • 2.Qh8#
      • 1...Ke3!
    • 1.Rb3?
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Rb4#
      • 1...Ke5
        • 2.Qh8#
      • 1...Ke3!
    • 1.Rb4+?
      • 1...Ke5
        • 2.Qh8#
      • 1...Ke3!
    • 1.Rb5?
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Rb4#
      • 1...Ke3!
    • 1.Rb6?
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Rb4#
      • 1...Ke5
        • 2.Qh8#
      • 1...Ke3!
    • 1.Rbc7?
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Qh8#
      • 1...Ke3!
    • 1.Qa5?
      • threat
        • 2.Qc5#
      • 1...Kc4
        • 2.Rb4#
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qc5#
      • 1...d2
        • 2.Qc3#
      • 1...Ke3!
    • 1.Qa7+?
      • 1...Kc4
        • 2.Rb4#
        • 2.Rdc7#
        • 2.Qc5#
      • 1...Ke5!
    • 1.Qc8?
      • threat
        • 2.Qc5#
      • 1...Ke5
        • 2.Qc3#
        • 2.Qh8#
      • 1...d2
        • 2.Qc3#
      • 1...Ke3!
  • Keys
    • 1.Rb2!
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Qa7#
      • 1...Kc4
        • 2.Rb4#
      • 1...Ke5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINS(c),P-FLIGHT::R1(E)
    • K(b);N_SPINS(c),S_FLIGHT::QAB(G)
  • Tries
    • Try
      • R(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(b);N_SPINS(c),P-FLIGHT::R1(E)
        • K(b);N_SPINS(c),S_FLIGHT::QAB(G)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • R(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(b);N_SPINS(c),P-FLIGHT::R1(E)
        • K(b);N_SPINS(c),S_FLIGHT::QAB(G)
      • Refutation
        • K(b);N_SPINS(c),P_SPINP(a),S_FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • K(b);N_SPINS(c),S_FLIGHT::QAB(G)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • R(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(b);N_SPINS(c),P-FLIGHT::R1(E)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • R(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(b);N_SPINS(c),P-FLIGHT::R1(E)
        • K(b);N_SPINS(c),S_FLIGHT::QAB(G)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • R(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(b);N_SPINS(c),S_FLIGHT::QAB(G)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • P(a);::QAB1(G)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • P(a);::QAB1(G)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
  • Actual
    • R(E);
    • Threat
      • QAR1(G)
    • Vars
      • K(b);N_SPINS(c),S_FLIGHT::QAB(G)
      • K(b);N_SPINS(c),P-FLIGHT::R1(E)
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