MESON Chess Problem Database

Problem Display
PID: 166703 (B7/8/p7/8/2kp4/K7/3Q4/5b2 w - - 0 1)

Lincoln, Robert A

StrateGems, 2016

B7/8/p7/8/2kp4/K7/3Q4/5b2

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qb4#
    • 1...Kc5
      • 2.Qb4#
    • 1...Bd3
      • 2.Qb4#
    • 1...d3
      • 2.Qb4#
  • Tries
    • 1.Be4?
      • threat
        • 2.Qb4#
      • 1...Kb5
        • 2.Qb4#
      • 1...Kc5
        • 2.Qb4#
      • 1...a5!
    • 1.Bc6?
      • threat
        • 2.Qc2#
      • 1...d3
        • 2.Qb4#
      • 1...Bd3
        • 2.Qb4#
      • 1...Kc5!
    • 1.Qxd4+?
      • 1...Kb5
        • 2.Qb4#
      • 1...Kxd4!
  • Keys
    • 1.Ka4!
      • threat
        • 2.Qc2#
      • 1...Kc5
        • 2.Qb4#
      • 1...d3
        • 2.Qb4#
      • 1...Bd3
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAR1(A)
    • K(b);P-FLIGHT::QAB1(A)
    • B(a);SBLOCK::QAR1(A)
    • P(c);SBLOCK::QAR1(A)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Threat
        • QAR2(A)
      • Vars
        • P(c);SBLOCK::QAR1(A)
        • B(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK,XP(c)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
  • Actual
    • K(B);P-FLIGHT
    • Threat
      • QAR2(A)
    • Vars
      • K(b);P-FLIGHT::QAB1(A)
      • P(c);SBLOCK::QAR1(A)
      • B(a);SBLOCK::QAR1(A)
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