MESON Chess Problem Database

Problem Display
PID: 144526 (2N5/3p4/1pP1pB2/Pp1k4/1P2R3/K4P2/4P1Q1/8 w - - 0 1)

Wallis, G

Hampstead and Highgate Express, 1895

(First published on Sat Mar 23 1895)

2N5/3p4/1pP1pB2/Pp1k4/1P2R3/K4P2/4P1Q1/8

#2

10 + 5

14867 BCPS Library 2012
3713 Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...dxc6
      • 2.Rd4#
    • 1...d6
      • 2.Se7#
  • Tries
    • 1.Qg7?
      • threat
        • 2.Qxd7#
      • 1...dxc6
        • 2.Rd4#
        • 2.Qd7#
      • 1...d6
        • 2.Se7#
      • 1...Kxc6!
    • 1.f4?
      • threat
        • 2.Rd4#
      • 1...Kxc6
        • 2.Rc4#
      • 1...e5!
  • Keys
    • 1.Rc4!
      • 1...Kxc4
        • 2.Sxb6#
      • 1...bxc4
        • 2.f4#
      • 1...bxa5
        • 2.Rc5#
      • 1...dxc6
        • 2.Rd4#
      • 1...e5
        • 2.Qg8#
      • 1...d6
        • 2.Sxb6#

Anticipated by 224135(1877)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(e);SBLOCK,XP(H)::R1(F)
    • P(e);SBLOCK::S(J)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR2(B),XP(e)
      • Vars
        • P(e);SBLOCK::S(J)
      • Refutation
        • K(b);S_FLIGHT,XP(H)
    • Try
      • P(D);
      • Threat
        • QAB(B)+R(F),DCHECK
      • Vars
        • K(b);S_FLIGHT,XP(H)::QAB(B)+R(F),DCHECK
      • Refutation
        • P(d);
  • Actual
    • R(F);
    • Vars
      • K(b);S_FLIGHT,XR(F)::S(J),XP(c)
      • P(a);SBLOCK,XR(F)::QAB(B)+P(D)
      • P(c);N_GUARD,XP(G)::R1(F)
      • P(e);SBLOCK,XP(H)::R1(F)
      • P(d);OGATEB::QAB(B)
      • P(e);SBLOCK::S(J),XP(c)
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