MESON Chess Problem Database

Problem Display
PID: 255208 (2Q5/5p2/3P1P2/3Pk2p/RN3N1K/2R1P3/5P2/8 w - - 0 1)

Anonymous

English Mechanic and World of Science, 1889

(First published on Fri Aug 30 1889)

2Q5/5p2/3P1P2/3Pk2p/RN3N1K/2R1P3/5P2/8

#2

11 + 3

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Qc7#
  • Tries
    • 1.Sa2?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kxf6!
    • 1.Sc2?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kxf6!
    • 1.Sbd3+?
      • 1...Kxd6
        • 2.Rc6#
        • 2.Ra6#
        • 2.Qc6#
        • 2.Qc7#
        • 2.Qd8#
      • 1...Kxf6!
    • 1.Sa6?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kxf6!
    • 1.Sc6+?
      • 1...Kxd6
        • 2.Qd8#
      • 1...Kxf6!
    • 1.Sxh5?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Ke4!
    • 1.Rc4?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kxf6!
    • 1.Qf5+?
      • 1...Kxd6
        • 2.Rc6#
        • 2.Ra6#
      • 1...Kxf5!
    • 1.f3?
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kxf6!
  • Keys
    • 1.e4!
      • 1...Kd4
        • 2.Sbd3#
      • 1...Kxe4
        • 2.Sc6#
      • 1...Kxf4
        • 2.Qf5#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kxf6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
  • Tries
    • Try
      • S(E);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
      • Refutation
        • K(a);S_FLIGHT,XP(J)
    • Try
      • S(E);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
      • Refutation
        • K(a);S_FLIGHT,XP(J)
    • Try
      • S(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XP(J)
    • Try
      • S(E);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
      • Refutation
        • K(a);S_FLIGHT,XP(J)
    • Try
      • S(E);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XP(I)::QAR2(K)
      • Refutation
        • K(a);S_FLIGHT,XP(J)
    • Try
      • S(F);XP(b)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
      • Refutation
        • K(a);S_FLIGHT,XP(J)
    • Try
      • Q(K);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(K)
    • Try
      • P(A);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
      • Refutation
        • K(a);S_FLIGHT,XP(J)
  • Actual
    • P(C);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::R(D)+S(E)
      • K(a);N_GUARD,P-FLIGHT,XP(C)::R(D)+S(E)
      • K(a);N_GUARD,S_FLIGHT,XS(F)::QAR1(K)
      • K(a);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
      • K(a);OGATEB,S_FLIGHT,XP(J)::QAB(K)
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