MESON Chess Problem Database

Problem Display
PID: 234721 (8/2K5/8/2pk3p/Q5N1/5N2/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2013

8/2K5/8/2pk3p/Q5N1/5N2/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qd7#
    • 1...c4
      • 2.Qc6#
  • Tries
    • 1.Kd7?
      • threat
        • 2.Se3#
        • 2.Sf6#
      • 1...c4
        • 2.Qc6#
      • 1...hxg4!
    • 1.Sfe5?
      • threat
        • 2.Qc4#
      • 1...Ke6
        • 2.Qd7#
      • 1...c4
        • 2.Qxc4#
      • 1...hxg4!
    • 1.Sf2?
      • threat
        • 2.Qe4#
      • 1...c4
        • 2.Qc6#
      • 1...Ke6!
    • 1.Sge5?
      • threat
        • 2.Qc6#
        • 2.Qc4#
      • 1...c4
        • 2.Qc6#
        • 2.Qxc4#
      • 1...Ke6!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Qd7#
      • 1...cxd4!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qd7#
        • 2.Qc4#
        • 2.Qe4#
      • 1...Ke6
        • 2.Qd7#
      • 1...hxg4
        • 2.Qe4#
      • 1...c4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(B)
    • P(a);::QAB1(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAB1(B)
      • Refutation
        • P(c);XS(C)
    • Try
      • S(A);
      • Threat
        • QAB1(B)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • P(a);::QAB1(B),XP(a)
      • Refutation
        • P(c);XS(C)
    • Try
      • S(C);
      • Threat
        • QAB1(B)
      • Vars
        • P(a);::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • P(a);XQ(B)
  • Actual
    • S(A);
    • Threat
      • DUALS(3)
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • P(c);XS(C)::QAB1(B)
      • P(a);::QAB1(B),XP(a)
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