MESON Chess Problem Database

Problem Display
PID: 151007 (2n5/1pK5/p7/r1R1N2b/3kP3/P2Pp3/1pr5/3R1BQ1 w - - 0 1)

Hallam, LC

The Referee, 1927

(First published on Sun Feb 13 1927)

2n5/1pK5/p7/r1R1N2b/3kP3/P2Pp3/1pr5/3R1BQ1

#2

9 + 9

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.d4#
  • Tries
    • 1.Sf3+?
      • 1...Kxc5
        • 2.Qg5#
        • 2.d4#
      • 1...Bxf3!
    • 1.Sc6+?
      • 1...Kxc5
        • 2.Qg5#
        • 2.d4#
      • 1...bxc6!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Sd7#
      • 1...Rcxc5+
        • 2.Sc6#
      • 1...Raxc5+
        • 2.Sc6#
      • 1...Kxc5
        • 2.d4#
      • 1...e2
        • 2.Qg1#
      • 1...Rf2
        • 2.Rc4#
      • 1...Rg2
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATE,S_FLIGHT,XR(G)::P(E)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • B(f);XS(H)
    • Try
      • S(H);CHECK,N_SPINR(G)
      • Refutation
        • P(h);XS(H)
  • Actual
    • Q(C);N_PINP(c)
    • Threat
      • QAB(C)+S(H)
    • Vars
      • R(b);CHECK,SBLOCK,XR(G)::QAB(C)+S(H),DCHECK
      • R(e);CHECK,SBLOCK,XR(G)::QAB(C)+S(H),DCHECK
      • K(d);OGATE,S_FLIGHT,XR(G)::P(E)
      • P(c);OGATEB::QAB(C)
      • R(b);N_GUARD,N_PINR(G)::R1(G)
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