MESON Chess Problem Database

Problem Display
PID: 152518 (4N3/3K4/3p4/2pkN3/1P1qn3/3P4/5Q2/B7 w - - 0 1)

le Jeune, H

Hampstead and Highgate Express, 1898

(First published on Sat Dec 3 1898)

4N3/3K4/3p4/2pkN3/1P1qn3/3P4/5Q2/B7

#2

7 + 5

14867 BCPS Library 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf2
      • 2.Sc7#
    • 1...Qe3
      • 2.Sc7#
      • 2.Qf7#
    • 1...Qxe5
      • 2.Sc7#
    • 1...Qxd3
      • 2.Sc7#
      • 2.Qf7#
    • 1...Qxb4
      • 2.Sc7#
      • 2.Qf7#
    • 1...Qc4
      • 2.Sc7#
      • 2.Qf7#
      • 2.dxc4#
    • 1...cxb4
      • 2.Qxd4#
    • 1...c4
      • 2.Qxd4#
    • 1...dxe5
      • 2.Sc7#
      • 2.Qf7#
  • Tries
    • 1.Qf4?
      • threat
        • 2.Sc7#
      • 1...Sf6+
        • 2.Sxf6#
      • 1...Qxa1
        • 2.Qxe4#
      • 1...Qb2
        • 2.Qxe4#
      • 1...Qc3
        • 2.Qxe4#
      • 1...cxb4!
    • 1.Qf5?
      • threat
        • 2.Sc7#
        • 2.Qe6#
      • 1...Sf6+
        • 2.Sxf6#
      • 1...Qxa1
        • 2.Qxe4#
      • 1...Qxe5
        • 2.Sc7#
      • 1...Qb2
        • 2.Qxe4#
      • 1...Qc3
        • 2.Qxe4#
      • 1...Sg5
        • 2.Sf6#
        • 2.Sc7#
      • 1...cxb4!
    • 1.dxe4+?
      • 1...Kxe5
        • 2.Qf5#
      • 1...Qxe4
        • 2.Sf6#
        • 2.Sc7#
        • 2.Qf7#
      • 1...Kxe4!
  • Keys
    • 1.Qe3!
      • 1...Sf6+
        • 2.Sxf6#
      • 1...Kxe5
        • 2.Qxe4#
      • 1...Qxa1
        • 2.Qxe4#
      • 1...Qxe3
        • 2.Sc7#
      • 1...Qxe5
        • 2.Sc7#
      • 1...Qxd3
        • 2.Sc7#
        • 2.Qxd3#
      • 1...Qxb4
        • 2.Sc7#
      • 1...cxb4
        • 2.Qxd4#
      • 1...dxe5
        • 2.Sc7#
      • 1...Qb2
        • 2.Qxe4#
      • 1...Qc3
        • 2.Qxe4#
      • 1...Qc4
        • 2.Sc7#
        • 2.dxc4#
      • 1...Sd2
        • 2.Sf6#
        • 2.Sc7#
      • 1...Sf2
        • 2.Sf6#
        • 2.Sc7#
      • 1...Sc3
        • 2.Sf6#
        • 2.Sc7#
      • 1...Sg3
        • 2.Sf6#
        • 2.Sc7#
      • 1...Sg5
        • 2.Sf6#
        • 2.Sc7#
      • 1...c4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • Q(a);XQ(B)::S(G)
    • Q(a);XS(E)::S(G)
    • P(c);N_GUARD,XP(D)::QAR1(B),XQ(a)
    • P(c);N_GUARD::QAR1(B),XQ(a)
  • Tries
    • Try
      • Q(B);
      • Threat
        • S(G)
      • Vars
        • S(b);CHECK,N_GUARD::S(G),XS(b)
        • Q(a);N_GUARD,XB(A)::QAB1(B),XS(b)
        • Q(a);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • P(c);XP(D)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);CHECK,N_GUARD::S(G),XS(b)
        • Q(a);N_GUARD,XB(A)::QAB1(B),XS(b)
        • Q(a);P_SPINQ(a),XS(E)::S(G)
        • Q(a);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • P(c);XP(D)
    • Try
      • P(C);CHECK,XS(b)
      • Vars
        • K(d);P-FLIGHT,P_SPINQ(a),XS(E)::QAR1(B)
      • Refutation
        • K(d);S_FLIGHT,XP(C)
  • Actual
    • Q(B);
    • Vars
      • S(b);CHECK,N_GUARD::S(G),XS(b)
      • K(d);P-FLIGHT,P_SPINQ(a),P_SPINS(b),XS(E)::QAR1(B),XS(b)
      • Q(a);N_GUARD,XB(A)::QAB1(B),XS(b)
      • Q(a);XQ(B)::S(G)
      • Q(a);XS(E)::S(G)
      • Q(a);XP(D)::S(G)
      • P(c);N_GUARD,XP(D)::QAR1(B),XQ(a)
      • P(e);SBLOCK,XS(E)::S(G)
      • Q(a);N_GUARD::QAB1(B),XS(b)
      • P(c);N_GUARD::QAR1(B),XQ(a)
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