MESON Chess Problem Database

Problem Display
PID: 234619 (1q2k3/3p2K1/1B4b1/8/8/2Q5/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2003

1q2k3/3p2K1/1B4b1/8/8/2Q5/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5+
      • 2.Qxe5#
    • 1...Qa7
      • 2.Qe5#
    • 1...Qb7
      • 2.Qe5#
    • 1...Qa8
      • 2.Qe5#
    • 1...Qc8
      • 2.Qe5#
  • Tries
    • 1.Qe1+?
      • 1...Qe5+
        • 2.Qxe5#
      • 1...Be4!
    • 1.Qe3+?
      • 1...Qe5+
        • 2.Qxe5#
      • 1...Be4!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qf8#
      • 1...d5
        • 2.Qe6#
      • 1...d6
        • 2.Qe6#
      • 1...Qf4
        • 2.Qd8#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qd6
        • 2.Qd8#
      • 1...Bf7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(c);CHECK,N_GUARD::QAR(A),XQ(c)
    • Q(c);N_GUARD::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • Q(c);CHECK,N_GUARD,P_SPINQ(c)::QAR(A),XQ(c)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(c);CHECK,N_GUARD,P_SPINQ(c)::QAR(A),XQ(c)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • P(b);N_GUARD::QAR2(A)
      • Q(c);N_GUARD::QAR1(A)
      • Q(c);N_GUARD,P_PINQ(A)::QAR(A),XQ(c)
      • B(a);N_GUARD::QAB1(A),XB(a)
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