MESON Chess Problem Database

Problem Display
PID: 258278 (1B1N4/6n1/2BN4/1p2k3/1K3p1Q/8/8/8 w - - 0 1)

Anonymous

English Mechanic and World of Science, 1891

(First published on Fri Feb 20 1891)

1B1N4/6n1/2BN4/1p2k3/1K3p1Q/8/8/8

#2

6 + 4

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Kc3?
      • 1...Sf5
        • 2.Sc4#
        • 2.S6f7#
      • 1...Sh5
        • 2.Qg5#
        • 2.Qe7#
      • 1...Se6
        • 2.S8f7#
      • 1...Se8
        • 2.Qg5#
        • 2.Qe7#
      • 1...f3
        • 2.Qd4#
      • 1...b4+!
    • 1.Se4+?
      • 1...Kf5
        • 2.Qg5#
      • 1...Kd4!
    • 1.S6f7+?
      • 1...Kf5
        • 2.Qg5#
      • 1...Kd4!
    • 1.Sc8+?
      • 1...Kf5
        • 2.Se7#
      • 1...Kd4!
    • 1.Qe1+?
      • 1...Kd4
        • 2.Qc3#
        • 2.Qe4#
      • 1...Kf6!
    • 1.Qg5+?
      • 1...Sf5
        • 2.Sxb5#
        • 2.Sxf5#
      • 1...Kd4!
    • 1.Qe7+?
      • 1...Kd4
        • 2.Qe4#
      • 1...Se6!
  • Keys
    • 1.Ba7!
      • 1...Kxd6
        • 2.Bb8#
      • 1...Sf5
        • 2.S6f7#
      • 1...Sh5
        • 2.Qe7#
      • 1...Se6
        • 2.S8f7#
      • 1...Se8
        • 2.Qe7#
      • 1...f3
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(d);SBLOCK::S(F)
        • P(a);OGATE::QAB1(B)
      • Refutation
        • P(b);CHECK
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT::QAR1(B)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT::S(D)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • B(E);
    • Vars
      • K(c);OGATEB,S_FLIGHT,XS(D)::B(E)
      • S(d);SBLOCK::S(D)
      • S(d);N_GUARD::QAR2(B)
      • S(d);SBLOCK::S(F)
      • P(a);OGATE::QAB1(B)
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