MESON Chess Problem Database

Problem Display
PID: 150344 (4N3/8/3P2p1/5kN1/7b/6p1/3QP1K1/3B4 w - - 0 1)

Challenger, Alfred Clement

Hampstead and Highgate Express, 1895

(First published on Sat Nov 30 1895)

4N3/8/3P2p1/5kN1/7b/6p1/3QP1K1/3B4

#2

7 + 4

14867 BCPS Library 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.e4#
  • Tries
    • 1.Kf3?
      • threat
        • 2.Qf4#
        • 2.Qa5#
        • 2.Qd5#
      • 1...Bxg5
        • 2.Qd5#
      • 1...Ke5!
    • 1.Bc2+?
      • 1...Kg4
        • 2.Sf6#
      • 1...Ke5!
    • 1.Qa5+?
      • 1...Kg4
        • 2.e3#
      • 1...Kf4!
    • 1.Qd4?
      • 1...Bxg5
        • 2.Sg7#
      • 1...Kxg5!
    • 1.Qd5+?
      • 1...Kg4
        • 2.e3#
      • 1...Kf4!
  • Keys
    • 1.e3!
      • threat
        • 2.Qa5#
        • 2.Qd5#
      • 1...Ke5
        • 2.Qa5#
      • 1...Kxg5
        • 2.e4#
      • 1...Bxg5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(c);S_FLIGHT::B(A)+P(C)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • DUALS(3)
      • Vars
        • B(b);SBLOCK,XS(E)::QAR2(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • B(A);CHECK
      • Vars
        • K(c);S_FLIGHT::S(G)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::B(A)+P(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • B(b);SBLOCK,XS(E)::S(G)
      • Refutation
        • K(c);P-FLIGHT,XS(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::B(A)+P(C)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • P(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);P-FLIGHT::QAR(B)
      • K(c);P-FLIGHT,XS(E)::QAB(B)+P(C)
      • B(b);SBLOCK,XS(E)::QAR2(B)
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