MESON Chess Problem Database

Problem Display
PID: 135620 (8/1B6/5Q2/8/3p2p1/8/2N1k3/2K5 w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

8/1B6/5Q2/8/3p2p1/8/2N1k3/2K5

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...g3
      • 2.Qf3#
  • Tries
    • 1.Be4?
      • 1...g3
        • 2.Qf3#
      • 1...d3!
    • 1.Qe5+?
      • 1...Kf1
        • 2.Qe1#
      • 1...Kf2
        • 2.Qe1#
      • 1...Kd3!
    • 1.Qe7+?
      • 1...Kf1
        • 2.Qe1#
      • 1...Kf2
        • 2.Qe1#
      • 1...Kd3!
    • 1.Qf5?
      • 1...g3
        • 2.Qf3#
      • 1...d3!
    • 1.Qe6+?
      • 1...Kf1
        • 2.Qe1#
      • 1...Kf2
        • 2.Qe1#
      • 1...Kd3!
  • Keys
    • 1.Qc6!
      • 1...Kf1
        • 2.Qg2#
      • 1...Kf2
        • 2.Qg2#
      • 1...Kd3
        • 2.Ba6#
      • 1...d3
        • 2.Qg2#
      • 1...g3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAB1(C)
  • Tries
    • Try
      • B(D);
      • Vars
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
        • K(a);OGATE,P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
        • K(a);OGATE,P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
        • K(a);OGATE,P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);P-FLIGHT::QAR1(C)
      • K(a);S_FLIGHT::B(D)
      • P(b);SBLOCK::QAR2(C)
      • P(c);N_GUARD::QAB1(C)
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