MESON Chess Problem Database

Problem Display
PID: 283010 (5R2/8/3p4/3k4/1R1P4/4P3/3K4/Q2B4 w - - 0 1)

Koshel, Mikhail Igorevich

64 Shakhmatnoe obozrenie, 2025

5R2/8/3p4/3k4/1R1P4/4P3/3K4/Q2B4

#2

7 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Bf3#
  • Tries
    • 1.Bb3+?
      • 1...Ke4
        • 2.Rf4#
        • 2.Qb1#
        • 2.Qh1#
        • 2.d5#
      • 1...Kc6!
    • 1.Ba4?
      • 1...Ke4
        • 2.Qh1#
      • 1...Ke6!
    • 1.Bg4?
      • threat
        • 2.Qh1#
        • 2.Qa8#
      • 1...Ke4
        • 2.Bf3#
        • 2.Qh1#
      • 1...Kc6!
    • 1.Rb6?
      • 1...Kc4
        • 2.Bb3#
        • 2.Qa2#
      • 1...Ke4
        • 2.Bf3#
      • 1...Ke6!
    • 1.Rf6?
      • threat
        • 2.Bf3#
        • 2.Qa8#
      • 1...Ke4
        • 2.Bf3#
      • 1...Kc6!
    • 1.Rf7?
      • 1...Ke4
        • 2.Bf3#
      • 1...Kc6
        • 2.Qa8#
      • 1...Ke6!
    • 1.Qc3?
      • 1...Ke4
        • 2.Bf3#
      • 1...Ke6!
    • 1.Qc1?
      • 1...Ke4
        • 2.Bf3#
      • 1...Ke6!
    • 1.Qa2+?
      • 1...Ke4
        • 2.Bc2#
        • 2.Bf3#
        • 2.Rf4#
        • 2.Qe6#
      • 1...Kc6!
    • 1.Qa4?
      • 1...Ke4
        • 2.Bf3#
      • 1...Ke6!
    • 1.Qa5+?
      • 1...Ke4
        • 2.Bc2#
        • 2.Bf3#
        • 2.Rf4#
        • 2.Re8#
        • 2.Qf5#
      • 1...Kc6
        • 2.Ba4#
      • 1...Ke6!
    • 1.Qa6?
      • 1...Ke4
        • 2.Bf3#
      • 1...Ke6!
  • Keys
    • 1.Qa7!
      • 1...Ke4
        • 2.Bf3#
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::B(B)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(B)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::B(B)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • R(G);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(B)
        • K(a);N_GUARD,S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(B)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::B(B)
      • K(a);N_GUARD,S_FLIGHT::QAB1(A)
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