MESON Chess Problem Database

Problem Display
PID: 153285 (8/B7/3Q2K1/1B6/8/5kp1/8/7b w - - 0 1)

Lincoln, Robert A

StrateGems, 2012

8/B7/3Q2K1/1B6/8/5kp1/8/7b

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Bc6#
  • Tries
    • 1.Kf5?
      • threat
        • 2.Qd5#
        • 2.Qc6#
      • 1...g2
        • 2.Qa3#
        • 2.Qf4#
        • 2.Qd3#
      • 1...Kg2!
    • 1.Kg5?
      • threat
        • 2.Qd5#
        • 2.Qc6#
      • 1...Ke4
        • 2.Bc6#
      • 1...g2
        • 2.Qf4#
        • 2.Qd3#
      • 1...Kg2!
    • 1.Qxg3+?
      • 1...Ke4
        • 2.Bc6#
      • 1...Kxg3!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kg4!
    • 1.Qf6+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Kg4
        • 2.Bd7#
      • 1...Kg2!
  • Keys
    • 1.Bb8!
      • 1...Kf2
        • 2.Qxg3#
      • 1...Kg2
        • 2.Qxg3#
      • 1...Ke3
        • 2.Qf4#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kg4
        • 2.Qxg3#
      • 1...Bg2
        • 2.Qf4#
      • 1...g2
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::B(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK,XP(c)
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(D);
    • Vars
      • K(b);P-FLIGHT::QAB1(B),XP(c)
      • K(b);S_FLIGHT::QAR1(B),XP(c)
      • K(b);P-FLIGHT::QAB1(B)
      • K(b);S_FLIGHT::QAB1(B)
      • B(a);SBLOCK::QAR1(B)
      • P(c);SBLOCK::QAR1(B)
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