MESON Chess Problem Database

Problem Display
PID: 233399 (7b/5Pk1/8/7K/3N4/8/B1Q5/8 w - - 0 1)

Lincoln, Robert A

Chess Life, 2006

7b/5Pk1/8/7K/3N4/8/B1Q5/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sf3?
      • 1...Kf6
        • 2.f8Q#
      • 1...Kf8!
    • 1.Sf5+?
      • 1...Kh7
        • 2.f8S#
      • 1...Kf8
        • 2.Qc5#
        • 2.Qc8#
      • 1...Kf6!
    • 1.Sc6?
      • 1...Kf6
        • 2.Qg6#
        • 2.f8Q#
      • 1...Kf8!
    • 1.Qe4?
      • 1...Kf6
        • 2.f8Q#
      • 1...Kf8!
    • 1.Qc1?
      • threat
        • 2.Qh6#
      • 1...Kf6
        • 2.Qg5#
      • 1...Kh7
        • 2.Qh6#
      • 1...Kf8!
    • 1.Qd2?
      • threat
        • 2.Qh6#
      • 1...Kf6
        • 2.Qg5#
      • 1...Kh7
        • 2.Qh6#
      • 1...Kf8!
    • 1.Qg2+?
      • 1...Kf6
        • 2.Qg5#
      • 1...Kh7
        • 2.Bb1#
        • 2.Qg6#
        • 2.Qg8#
        • 2.f8S#
      • 1...Kf8!
    • 1.Qc5?
      • 1...Kf6
        • 2.Qg5#
        • 2.f8Q#
      • 1...Kh7!
    • 1.Qc6?
      • threat
        • 2.Qh6#
      • 1...Kh7
        • 2.Qg6#
        • 2.Qh6#
      • 1...Kf8!
    • 1.Qc8?
      • 1...Kh7
        • 2.Qg8#
      • 1...Kf6!
    • 1.f8B+?
      • 1...Kf6
        • 2.Qf5#
      • 1...Kxf8!
  • Keys
    • 1.Qc7!
      • 1...Kf6
        • 2.f8Q#
        • 2.f8R#
      • 1...Kh7
        • 2.f8S#
      • 1...Kf8
        • 2.Se6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::P=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT::P=S
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::P=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XB(E)
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::P=Q
      • K(a);P-FLIGHT::P=S
      • K(a);S_FLIGHT::S(C)
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