MESON Chess Problem Database

Problem Display
PID: 23082 (5n2/8/2N5/5k1K/Q4p2/8/B7/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

5n2/8/2N5/5k1K/Q4p2/8/B7/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qb5+?
      • 1...Kf6
        • 2.Qe5#
        • 2.Qg5#
      • 1...Ke4!
    • 1.Qc4?
      • 1...Kf6
        • 2.Qf7#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sg6
        • 2.Qe6#
      • 1...Sd7
        • 2.Qe6#
      • 1...Sh7
        • 2.Qe6#
      • 1...f3!
    • 1.Qd4?
      • threat
        • 2.Se7#
        • 2.Qe5#
      • 1...Sd7
        • 2.Se7#
      • 1...Sg6!
    • 1.Qe4+?
      • 1...Kf6
        • 2.Qe5#
      • 1...Kxe4!
    • 1.Qa5+?
      • 1...Kf6
        • 2.Qe5#
        • 2.Qg5#
      • 1...Ke4!
  • Keys
    • 1.Qb3!
      • 1...Ke4
        • 2.Bb1#
      • 1...Kf6
        • 2.Qf7#
      • 1...f3
        • 2.Qxf3#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sg6
        • 2.Qe6#
      • 1...Sd7
        • 2.Qe6#
      • 1...Sh7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • S(c);N_GUARD::QAB1(B),XS(c)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::S(D)
      • Refutation
        • S(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT::B(A)
      • K(b);P-FLIGHT::QAR1(B)
      • P(a);OGATEB::QAR2(B),XP(a)
      • S(c);N_GUARD::QAB1(B),XS(c)
      • S(c);N_GUARD::QAB1(B)
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