MESON Chess Problem Database

Problem Display
PID: 190288 (2B2R2/5N1Q/2r1p3/3p3K/5k2/2nR1p1n/2N2p1P/8 w - - 0 1)

Montgomerie, John

The Observer, 1938

(First published on Sun Feb 13 1938)

2B2R2/5N1Q/2r1p3/3p3K/5k2/2nR1p1n/2N2p1P/8

#2

8 + 8

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Rd4#
    • 1...Sd1
      • 2.Rd4#
    • 1...Sa2
      • 2.Rd4#
    • 1...Sa4
      • 2.Rd4#
    • 1...e5
      • 2.Sd6#
      • 2.Qf5#
  • Tries
    • 1.Qg7?
      • threat
        • 2.Sg5#
        • 2.Sd6#
        • 2.Qe5#
        • 2.Qg4#
      • 1...Kf5
        • 2.Sg5#
        • 2.Sd6#
        • 2.Qe5#
      • 1...Rxc8
        • 2.Qe5#
        • 2.Qg4#
      • 1...Rd6
        • 2.Sg5#
        • 2.Sxd6#
        • 2.Qe5#
        • 2.Qg4#
      • 1...Rc7
        • 2.Qe5#
        • 2.Qg4#
      • 1...Se4
        • 2.Qe5#
        • 2.Qg4#
      • 1...Sg5
        • 2.Sxg5#
        • 2.Qe5#
      • 1...e5
        • 2.Sd6#
        • 2.Qxe5#
        • 2.Qg4#
      • 1...Ke4!
    • 1.Qh8?
      • threat
        • 2.Sg5#
        • 2.Sd6#
        • 2.Qe5#
      • 1...Kf5
        • 2.Sg5#
        • 2.Sd6#
        • 2.Qe5#
      • 1...Rxc8
        • 2.Qe5#
      • 1...Rd6
        • 2.Sg5#
        • 2.Sxd6#
        • 2.Qe5#
      • 1...Rc7
        • 2.Qe5#
      • 1...Se4
        • 2.Qe5#
      • 1...Sg5
        • 2.Sxg5#
        • 2.Qe5#
      • 1...e5
        • 2.Sd6#
        • 2.Qxe5#
      • 1...Ke4!
  • Keys
    • 1.Kg6!
      • threat
        • 2.Qh4#
      • 1...e5+
        • 2.Sd6#
      • 1...Ke4
        • 2.Rd4#
      • 1...Kg4
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::R(C)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(4)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • R(g);XB(G)::QAB1(F)
        • R(g);::QAB1(F)
        • S(b);::QAB1(F)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • QAR2(F)
    • Vars
      • P(h);CHECK,SBLOCK::R(H)+S(E)
      • K(e);P-FLIGHT::R1(C)
      • K(e);P-FLIGHT,P_SPINP(h)::S(E)
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