MESON Chess Problem Database

Problem Display
PID: 70602 (8/2Q2N2/1p1N1pp1/5P2/1P1kP3/n7/4K3/4n3 w - - 0 1)

Challenger, Alfred Clement

Hampstead and Highgate Express, 1897

(First published on Sat Mar 6 1897)

8/2Q2N2/1p1N1pp1/5P2/1P1kP3/n7/4K3/4n3

#2

7 + 6

187 The Chess Bouquet 1897

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qc4#
    • 1...Sc2
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sb5
      • 2.Qc4#
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qb2#
        • 2.Qe3#
        • 2.Qa1#
      • 1...Sec2
        • 2.Qb2#
        • 2.Qd2#
      • 1...Sac2
        • 2.Qb2#
      • 1...Sg2
        • 2.Qb2#
        • 2.Qd2#
        • 2.Qa1#
      • 1...Sb1
        • 2.Qe3#
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sb5
        • 2.Qe3#
        • 2.Qc4#
      • 1...Sd3!
  • Keys
    • 1.Sg5!
      • 1...Ke5
        • 2.Sb5#
      • 1...fxg5
        • 2.Qg7#
      • 1...gxf5
        • 2.Sxf5#
      • 1...Sc4
        • 2.Sb5#
      • 1...Sec2
        • 2.Sf3#
      • 1...Sg2
        • 2.Sf3#
      • 1...Sd3
        • 2.Sf3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sb1
        • 2.Sb5#
      • 1...Sac2
        • 2.Sb5#
      • 1...Sb5
        • 2.Sxb5#
      • 1...b5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR1(F)
    • S(b);N_GUARD::QAR1(F),XS(b)
    • P(d);N_GUARD::QAB1(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);::QAB(F)
        • S(b);N_GUARD::QAR1(F),XS(b)
      • Refutation
        • S(a);
  • Actual
    • S(G);
    • Vars
      • K(c);S_FLIGHT::QAB(F)+S(E)
      • P(e);OGATEB,XS(G)::QAB(F)
      • P(f);XP(D)::S(E),XP(f)
      • S(b);N_GUARD::S(E)
      • S(a);N_GUARD::S(G)
      • S(a);N_GUARD::S(G),XS(a)
      • S(b);N_GUARD::S(E),XS(b)
      • P(d);N_GUARD::QAB1(F)
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