MESON Chess Problem Database

Problem Display
PID: 263111 (8/2R5/8/K2k4/3P4/1R2P3/Q7/8 w - - 0 1)

Alekseev, Yuri Mikhailovich

SuperProblem, 2020

8/2R5/8/K2k4/3P4/1R2P3/Q7/8

#2

6 + 1

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Rbc3+?
      • 1...Kd6
        • 2.R3c6#
      • 1...Ke4!
    • 1.Re7?
      • threat
        • 2.Rb6#
      • 1...Kc4
        • 2.Ra3#
      • 1...Kc6
        • 2.Rb6#
      • 1...Kd6!
    • 1.Qc2?
      • threat
        • 2.Qc6#
      • 1...Kd6
        • 2.Qc6#
      • 1...Ke6!
    • 1.Qg2+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Ke6!
    • 1.Qh2?
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Ke4!
  • Keys
    • 1.Rf7!
      • 1...Kc4
        • 2.Ra3#
      • 1...Ke4
        • 2.Qg2#
      • 1...Kc6
        • 2.Rb6#
      • 1...Kd6
        • 2.Rb6#
      • 1...Ke6
        • 2.Rb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::R1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(F);
      • Threat
        • QAB(A)+R(B)
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB(A)+R(B)
        • K(a);S_FLIGHT::R1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(F);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB(A)+R(B)
      • K(a);N_GUARD,S_FLIGHT::QAB(A)
      • K(a);N_GUARD,S_FLIGHT::R1(B)
      • K(a);N_GUARD,P-FLIGHT::R(B)
      • K(a);N_GUARD,S_FLIGHT::QAB(A)+R(B),DCHECK
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