MESON Chess Problem Database

Problem Display
PID: 234691 (8/8/p4Qp1/7k/6N1/5nK1/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2011

8/8/p4Qp1/7k/6N1/5nK1/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qh4#
    • 1...Sg1
      • 2.Qh4#
    • 1...Sd2
      • 2.Qh4#
    • 1...Sh2
      • 2.Qh4#
    • 1...Sd4
      • 2.Qh4#
    • 1...Sh4
      • 2.Qxh4#
    • 1...Se5
      • 2.Qh4#
    • 1...g5
      • 2.Qh6#
      • 2.Qf7#
  • Tries
    • 1.Kxf3?
      • 1...g5
        • 2.Qh6#
      • 1...a5!
    • 1.Kf4?
      • threat
        • 2.Qh8#
      • 1...Sg5
        • 2.Qxg5#
      • 1...g5+!
    • 1.Qxf3?
      • 1...Kg5
        • 2.Qd5#
      • 1...g5
        • 2.Qf7#
      • 1...a5!
    • 1.Qf4?
      • threat
        • 2.Sf6#
        • 2.Qh6#
      • 1...g5
        • 2.Qf7#
      • 1...Sg5!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxg6#
      • 1...Kh6
        • 2.Qxg6#
      • 1...Sxe5
        • 2.Qh4#
      • 1...Sh4
        • 2.Qxh4#
      • 1...g5
        • 2.Qh8#
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::QAR1(C)
    • S(a);N_GUARD::QAR1(C),XS(a)
  • Tries
    • Try
      • K(A);P-FLIGHT,XS(a)
      • Vars
        • P(d);OGATE::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR(C)
      • Vars
        • S(a);N_GUARD::QAR1(C),XS(a)
      • Refutation
        • P(d);CHECK
    • Try
      • Q(C);XS(a)
      • Vars
        • K(b);P-FLIGHT::QAR(C)
        • P(d);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • S(a);
  • Actual
    • S(B);
    • Threat
      • QAB1(C),XP(d)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(d)::QAR1(C),XP(d)
      • S(a);N_GUARD,XS(B)::QAR1(C)
      • S(a);N_GUARD::QAR1(C),XS(a)
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