MESON Chess Problem Database

Problem Display
PID: 234455 (k3BrR1/3KQ3/5p2/8/8/8/8/8 w - - 0 1)

Lincoln, Robert A

ChessStar, 2013

k3BrR1/3KQ3/5p2/8/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kc7?
      • threat
        • 2.Qa3#
      • 1...Ka7
        • 2.Qa3#
      • 1...Rf7!
    • 1.Kc8?
      • threat
        • 2.Qa3#
        • 2.Qb7#
      • 1...Rf7
        • 2.Bc6#
      • 1...Rxe8+!
  • Keys
    • 1.Kc6!
      • threat
        • 2.Qb7#
      • 1...Kb8
        • 2.Qb7#
      • 1...Rf7
        • 2.Bxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAR(B)
      • Vars
        • K(b);P-FLIGHT::QAR(B)
      • Refutation
        • R(c);P_PINQ(B)
    • Try
      • K(A);P_SPINB(C),S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(c);N_PINB(C)::B(C)
      • Refutation
        • R(c);CHECK,XB(C)
  • Actual
    • K(A);S_FLIGHT
    • Threat
      • QAB1(B)
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • R(c);OGATEB::R(D)+B(C),XR(c)
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