MESON Chess Problem Database

Problem Display
PID: 153425 (1b6/8/6n1/8/6pp/7k/8/2Q4K w - - 0 1)

Neyndorff, Luke

StrateGems, 2012

1b6/8/6n1/8/6pp/7k/8/2Q4K

#2

2 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kg3
      • 2.Qe3#
    • 1...Bg3
      • 2.Qf1#
    • 1...g3
      • 2.Qc8#
  • Tries
    • 1.Qe3+?
      • 1...g3
        • 2.Qe6#
      • 1...Bg3!
    • 1.Qg1?
      • threat
        • 2.Qg2#
      • 1...Sf4
        • 2.Qh2#
      • 1...g3!
    • 1.Qc2?
      • threat
        • 2.Qg2#
      • 1...Sf4
        • 2.Qh2#
      • 1...g3
        • 2.Qf5#
        • 2.Qc8#
      • 1...Kg3!
    • 1.Qc3+?
      • 1...g3
        • 2.Qc8#
      • 1...Bg3!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qg2#
      • 1...Kg3
        • 2.Qe3#
      • 1...Sf4
        • 2.Qh2#
      • 1...g3
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
    • B(e);SBLOCK::QAB(A)
    • P(b);OGATEB,SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b),SBLOCK::QAB(A)
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(d);S_CUTB(e)::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(d);S_CUTB(e)::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b),SBLOCK::QAB(A)
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • S(d);S_CUTB(e)::QAR1(A)
      • P(b);OGATEB,SBLOCK::QAB(A)
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