MESON Chess Problem Database

Problem Display
PID: 233324 (8/3p4/3p3N/1B1kpQ2/K7/4P3/3P4/8 w - - 0 1)

Neyndorff, Luke

Chess Life, 1987

8/3p4/3p3N/1B1kpQ2/K7/4P3/3P4/8

#2

6 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qh3?
      • 1...Ke4
        • 2.Qg2#
        • 2.Qh1#
      • 1...e4
        • 2.Qf5#
      • 1...Kc5!
    • 1.Qg4?
      • threat
        • 2.Qc4#
      • 1...e4
        • 2.Qf5#
      • 1...Kc5!
    • 1.Qg6?
      • 1...e4
        • 2.Qf5#
      • 1...Kc5!
    • 1.Qxd7?
      • 1...Kc5
        • 2.Qc6#
      • 1...e4
        • 2.Qf5#
      • 1...Ke4!
    • 1.Qh7?
      • 1...Ke6
        • 2.Qf7#
      • 1...e4
        • 2.Qf5#
      • 1...Kc5!
    • 1.Qf1?
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Qg2#
        • 2.Qh1#
      • 1...Ke6
        • 2.Qf7#
      • 1...e4
        • 2.Qf5#
      • 1...Kc5!
    • 1.Qf3+?
      • 1...Ke6
        • 2.Qf7#
      • 1...e4
        • 2.Qf5#
      • 1...Kc5!
    • 1.Qh5?
      • 1...Ke4
        • 2.Qh1#
      • 1...Ke6
        • 2.Qf7#
      • 1...Kc5!
    • 1.e4+?
      • 1...Kc5
        • 2.Qf2#
      • 1...Kd4!
  • Keys
    • 1.Qf2!
      • 1...Ke4
        • 2.Qg2#
      • 1...Kc5
        • 2.e4#
      • 1...Ke6
        • 2.Qf7#
      • 1...e4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • P(b);OGATEB::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);N_PINP(b)
      • Threat
        • QAB1(E)
      • Vars
        • P(b);OGATEB::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • P(b);OGATEB::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);N_PINP(b),P_PINP(c),XP(d)
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::QAR1(E)
        • P(b);OGATEB::QAR2(E)
      • Refutation
        • K(a);N_SPINP(c),S_FLIGHT
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • P(b);OGATEB::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);N_PINP(b)
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • P(b);OGATEB::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK,N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • P(b);OGATEB,P_SPINP(b)::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(E)
        • K(a);N_SPINP(b),S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB(E)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
  • Actual
    • Q(E);N_PINP(b)
    • Vars
      • K(a);S_FLIGHT::QAB(E)
      • K(a);P-FLIGHT::QAB(E)+P(B)
      • K(a);S_FLIGHT::QAB1(E)
      • P(b);OGATEB::QAR2(E)
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