MESON Chess Problem Database

Problem Display
PID: 234616 (4k3/6R1/b7/4n3/8/B3Q3/8/K7 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2003

4k3/6R1/b7/4n3/8/B3Q3/8/K7

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qe7#
        • 2.Qf8#
      • 1...Kd8
        • 2.Qf8#
      • 1...Sf7
        • 2.Qe7#
      • 1...Sc6
        • 2.Qf8#
      • 1...Sd7
        • 2.Qe7#
      • 1...Sg6!
    • 1.Qa7?
      • threat
        • 2.Rg8#
        • 2.Qe7#
      • 1...Kd8
        • 2.Rg8#
      • 1...Bc4
        • 2.Qb8#
        • 2.Qe7#
        • 2.Qa8#
      • 1...Sc6
        • 2.Rg8#
        • 2.Qd7#
      • 1...Sg6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Bb7!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qh8#
      • 1...Bc4
        • 2.Qc8#
      • 1...Sg6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sf7
        • 2.Rg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);N_PINS(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
        • S(a);::QAR1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);N_PINS(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::R(D)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • B(b);
  • Actual
    • Q(C);N_PINS(a)
    • Threat
      • QAR(C)
    • Vars
      • K(c);P-FLIGHT::QAR(C)
      • B(b);N_GUARD::QAR2(C)
      • S(a);N_GUARD::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(a)
      • S(a);SBLOCK::R(D)
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