MESON Chess Problem Database

Problem Display
PID: 238031 (2K5/8/p4P2/R4Q2/8/1Bkb3R/2P5/8 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Hlas l'udu, 1981

2K5/8/p4P2/R4Q2/8/1Bkb3R/2P5/8

#2

7 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Qc5#
    • 1...Kd4
      • 2.Rxd3#
      • 2.Qxd3#
      • 2.Qe5#
  • Tries
    • 1.Rxd3+?
      • 1...Kb4
        • 2.Ra4#
        • 2.Qc5#
      • 1...Kb2!
    • 1.Ra1?
      • 1...Kb2
        • 2.Qe5#
      • 1...Kd2
        • 2.Qxd3#
      • 1...Kb4
        • 2.Qa5#
      • 1...Kd4
        • 2.Rxd3#
      • 1...a5!
    • 1.Qxd3+?
      • 1...Kb4
        • 2.Qd2#
        • 2.Qc3#
      • 1...Kb2!
    • 1.Qf2?
      • 1...Kb4
        • 2.Qe1#
        • 2.Qc5#
        • 2.Qd2#
      • 1...Kb2!
    • 1.Qe5+?
      • 1...Kb4
        • 2.Ra4#
        • 2.Qe1#
        • 2.Qc5#
      • 1...Kd2!
    • 1.Qg5?
      • 1...Kb4
        • 2.Qd2#
        • 2.Qc5#
      • 1...Kd4
        • 2.Qe5#
      • 1...Kb2!
  • Keys
    • 1.Qf1!
      • 1...Kb2
        • 2.Qa1#
      • 1...Kd2
        • 2.Rxd3#
      • 1...Kb4
        • 2.Qe1#
      • 1...Kd4
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINB(b),S_FLIGHT::QAB1(E)
  • Tries
    • Try
      • R(C);CHECK,XB(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT::QAB(E)
        • K(a);N_SPINB(b),S_FLIGHT::QAR1(E),XB(b)
        • K(a);N_SPINB(b),S_FLIGHT::QAB1(E)
        • K(a);N_SPINB(b),S_FLIGHT::R1(C),XB(b)
      • Refutation
        • P(c);
    • Try
      • Q(E);CHECK,XB(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);N_SPINB(b),S_FLIGHT::QAB1(E)
      • K(a);N_SPINB(b),S_FLIGHT::R1(C),XB(b)
      • K(a);N_SPINB(b),S_FLIGHT::QAB(E)
      • K(a);N_SPINB(b),S_FLIGHT::QAR1(E),XB(b)
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