MESON Chess Problem Database

Problem Display
PID: 273140 (3R1B2/K1Q5/1p1N4/3k4/3P1pr1/5p1B/b7/8 w - - 0 1)

van Engelen, Adrianus Cornelis

Probleemblad, 1952

3R1B2/K1Q5/1p1N4/3k4/3P1pr1/5p1B/b7/8

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qf7#
    • 1...Bb1
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
  • Tries
    • 1.Se4+?
      • 1...Ke6
        • 2.Bxg4#
        • 2.Qd7#
      • 1...Kxe4!
    • 1.Sf5+?
      • 1...Ke4
        • 2.Qc2#
      • 1...Ke6!
    • 1.Se8+?
      • 1...Ke6
        • 2.Bxg4#
        • 2.Qd7#
      • 1...Ke4!
    • 1.Qc5+?
      • 1...Ke6
        • 2.Qe5#
        • 2.Qf5#
      • 1...bxc5!
    • 1.Qb7+?
      • 1...Ke6
        • 2.Qf7#
      • 1...Kxd4!
    • 1.Qf7+?
      • 1...Kc6
        • 2.Rc8#
        • 2.Qb7#
      • 1...Kxd4!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qe4#
      • 1...Rg7+
        • 2.Sf7#
      • 1...Kxd4
        • 2.Sc4#
      • 1...Ke6
        • 2.Qf5#
      • 1...Bb1
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);N_GUARD,P_SPINR(d),S_FLIGHT::QAB1(E)
    • B(a);N_GUARD::QAB1(E)
    • B(a);N_GUARD::QAB1(E),XB(a)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(e);S_FLIGHT,XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(e);N_GUARD,S_FLIGHT::QAB(E)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • P(f);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(e);N_GUARD,P_SPINR(d),S_FLIGHT::QAB1(E)
      • Refutation
        • K(e);P-FLIGHT,XP(B)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(e);P-FLIGHT,XP(B)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • R(d);CHECK::R(F)+S(C)
      • K(e);N_GUARD,P-FLIGHT,XP(B)::R(F)+S(C)
      • K(e);N_GUARD,P_SPINR(d),S_FLIGHT::QAB1(E)
      • B(a);N_GUARD::QAB1(E)
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