MESON Chess Problem Database

Problem Display
PID: 269171 (1K6/8/Q1Np4/3p2p1/2r5/1PpkpB2/R4pN1/8 w - - 0 1)

Holroyd, GC

Sunday Referee, 1930

(First published on Sun Jul 13 1930)

1K6/8/Q1Np4/3p2p1/2r5/1PpkpB2/R4pN1/8

#2

7 + 8

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...f1S
      • 2.Se1#
    • 1...f1B
      • 2.Se1#
    • 1...d4
      • 2.Sb4#
      • 2.Qxc4#
    • 1...g4
      • 2.Sf4#
  • Tries
    • 1.Be4+?
      • 1...dxe4
        • 2.Qxc4#
      • 1...Kxe4!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qxe3#
      • 1...Rb4+
        • 2.Sxb4#
      • 1...f1S
        • 2.Se1#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Re4
        • 2.Be2#
      • 1...Rc5
        • 2.Qh7#
      • 1...e2
        • 2.Qe3#
      • 1...d4
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • P(a);N_GUARD::S(B)
    • P(g);N_GUARD::S(B)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • P(f);XB(D)::QAB1(E),XR(e)
      • Refutation
        • K(c);N_SPINR(e),S_FLIGHT,XB(D)
  • Actual
    • Q(E);N_PINR(e)
    • Threat
      • QAR1(E),XP(d)
    • Vars
      • R(e);CHECK,N_GUARD::S(F),XR(e)
      • P(a);N_GUARD::S(B)
      • R(e);N_GUARD::QAR1(E),XR(e)
      • R(e);SBLOCK::B(D)
      • R(e);N_GUARD::QAB(E)
      • P(d);::QAR1(E)
      • P(f);S_CUTR(e)::QAB(E)
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