MESON Chess Problem Database

Problem Display
PID: 222627 (K5N1/6Q1/8/2kp4/B7/8/4N3/8 w - - 0 1)

Briggs, A

English Mechanic and World of Science, 1883

(First published on Fri Jan 12 1883)

K5N1/6Q1/8/2kp4/B7/8/4N3/8

#2

5 + 2

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qc3#
      • 2.Qd4#
    • 1...Kb6
      • 2.Qa7#
    • 1...Kd6
      • 2.Qe7#
    • 1...d4
      • 2.Qxd4#
  • Tries
    • 1.Ka7?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qd4#
      • 1...Kd6
        • 2.Qe7#
      • 1...d4
        • 2.Qxd4#
      • 1...Kb4!
    • 1.Kb7?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qd4#
      • 1...Kd6
        • 2.Qe7#
      • 1...d4
        • 2.Qxd4#
      • 1...Kb4!
    • 1.Kb8?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qd4#
      • 1...Kb6
        • 2.Qa7#
      • 1...Kd6
        • 2.Qe7#
      • 1...d4
        • 2.Qxd4#
      • 1...Kb4!
    • 1.Qb2?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qd4#
        • 2.Qb5#
      • 1...d4
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Qf6?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qd4#
      • 1...d4
        • 2.Qxd4#
      • 1...Kb4!
    • 1.Qa7+?
      • 1...Kc4
        • 2.Qd4#
      • 1...Kd6
        • 2.Qe7#
      • 1...Kb4!
    • 1.Qb7?
      • 1...Kc4
        • 2.Qb5#
      • 1...Kd6
        • 2.Qe7#
      • 1...d4!
    • 1.Qd7?
      • 1...Kc4
        • 2.Qb5#
      • 1...Kb6
        • 2.Qa7#
      • 1...d4
        • 2.Qxd4#
      • 1...Kb4!
    • 1.Qe7+?
      • 1...Kb6
        • 2.Qa7#
      • 1...Kc4!
  • Keys
    • 1.Be8!
      • 1...Kb4
        • 2.Qc3#
      • 1...Kc4
        • 2.Qc3#
      • 1...Kb6
        • 2.Qa7#
      • 1...Kd6
        • 2.Qe7#
      • 1...d4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(C)
    • P(b);::QAB1(C),XP(b)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAB1(C)
        • P(b);OGATE::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);P-FLIGHT::QAR1(C)
      • P(b);::QAB1(C),XP(b)
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