MESON Chess Problem Database

Problem Display
PID: 46391 (Q1K5/1p6/2k5/5R2/8/8/2B5/1q6 w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

Q1K5/1p6/2k5/5R2/8/8/2B5/1q6

#2

4 + 3

136 Problem Observer 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kb6
      • 2.Qxb7#
  • Tries
    • 1.Bxb1?
      • 1...Kb6
        • 2.Qxb7#
      • 1...Kd6!
    • 1.Qxb7+?
      • 1...Kd6
        • 2.Qd7#
      • 1...Qxb7+!
    • 1.Qa5?
      • threat
        • 2.Rf6#
        • 2.Qc7#
        • 2.Qc5#
      • 1...Qxc2
        • 2.Rf6#
        • 2.Qc7#
      • 1...Qb5
        • 2.Qc7#
      • 1...Qa2
        • 2.Qc7#
        • 2.Qc5#
      • 1...Qa1
        • 2.Qc7#
        • 2.Qc5#
      • 1...Qd1
        • 2.Qc7#
        • 2.Qc5#
      • 1...Qe1
        • 2.Qc7#
        • 2.Qc5#
      • 1...Qf1
        • 2.Qc7#
        • 2.Qc5#
      • 1...Qg1
        • 2.Rf6#
        • 2.Qc7#
      • 1...Qb2
        • 2.Qc7#
        • 2.Qc5#
      • 1...Qb3
        • 2.Qc7#
        • 2.Qc5#
      • 1...Qb4
        • 2.Qc7#
      • 1...Qb6
        • 2.Rf6#
        • 2.Qd5#
      • 1...b5
        • 2.Qc7#
        • 2.Qa6#
      • 1...b6
        • 2.Rf6#
        • 2.Qd5#
      • 1...Kd6!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qc7#
      • 1...Kb6
        • 2.Qxb7#
      • 1...Qb6
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(c),P-FLIGHT::QAR1(C),XP(c)
  • Tries
    • Try
      • B(A);XQ(a)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAR1(C),XP(c)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT
    • Try
      • Q(C);CHECK,XP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • Q(a);CHECK,XQ(C)
    • Try
      • Q(C);N_PINP(c)
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);N_PINP(c)
    • Threat
      • QAR1(C)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(c)::QAR1(C),XP(c)
      • Q(a);N_GUARD,SBLOCK::B(A)
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