MESON Chess Problem Database

Problem Display
PID: 231868 (8/2Q2B2/8/3R4/1p2p3/1k2K3/8/8 w - - 0 1)

Bochej, Vasyl

Kudesnik, 1998

8/2Q2B2/8/3R4/1p2p3/1k2K3/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Ra5#
  • Tries
    • 1.Rd2+?
      • 1...Ka3
        • 2.Ra2#
        • 2.Qa5#
        • 2.Qa7#
      • 1...Ka4!
    • 1.Rd3+?
      • 1...Ka4
        • 2.Be8#
      • 1...Kb2!
    • 1.Qc1?
      • threat
        • 2.Ra5#
      • 1...Ka2
        • 2.Rd2#
        • 2.Ra5#
      • 1...Ka4!
    • 1.Qc2+?
      • 1...Ka3
        • 2.Ra5#
      • 1...Kxc2!
  • Keys
    • 1.Qh2!
      • 1...Ka3
        • 2.Ra5#
      • 1...Kc3
        • 2.Rc5#
      • 1...Ka4
        • 2.Qa2#
      • 1...Kc4
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::R1(B)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • B(D)+R(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT::R(B)
      • K(a);S_FLIGHT::QAR2(C)
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