MESON Chess Problem Database

Problem Display
PID: 182770 (3B4/5B2/8/1p5R/k7/8/8/1K5R w - - 0 1)

Lincoln, Robert A

Problem Observer, 2015

3B4/5B2/8/1p5R/k7/8/8/1K5R

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Ra5#
  • Tries
    • 1.Ka2?
      • 1...b4
        • 2.Bb3#
        • 2.Be8#
        • 2.Ra5#
      • 1...Kb4!
    • 1.R1h3?
      • 1...b4
        • 2.Be8#
        • 2.Ra5#
      • 1...Kb4!
    • 1.R1h4+?
      • 1...b4
        • 2.Ra5#
      • 1...Ka3!
    • 1.R5h3?
      • 1...b4
        • 2.Be8#
      • 1...Kb4!
    • 1.R5h4+?
      • 1...Ka3
        • 2.R1h3#
      • 1...b4!
  • Keys
    • 1.Kb2!
      • 1...Kb4
        • 2.R1h4#
      • 1...b4
        • 2.Bb3#
        • 2.Be8#
        • 2.Ra1#
        • 2.Ra5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATE,SBLOCK::R1(C)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • P(b);OGATE,P_SPINP(b)::R1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);
      • Vars
        • P(b);OGATEB,SBLOCK::B(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • K(a);P-FLIGHT::R(B)
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Developed and maintained by Brian Stephenson.
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