MESON Chess Problem Database

Problem Display
PID: 150239 (n7/3q4/p1p5/1k2N3/1P4PQ/K2p1B2/8/3b2B1 w - - 0 1)

Snowdon, G (Jr)

The Referee, 1925

(First published on Sun Mar 29 1925)

n7/3q4/p1p5/1k2N3/1P4PQ/K2p1B2/8/3b2B1

#2

7 + 7

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg4
      • 2.Bxc6#
    • 1...Qf5
      • 2.Bxc6#
    • 1...Qa7
      • 2.Bxc6#
    • 1...Qe7
      • 2.Bxc6#
    • 1...Qf7
      • 2.Bxc6#
    • 1...Qg7
      • 2.Bxc6#
    • 1...Qh7
      • 2.Bxc6#
    • 1...Qd8
      • 2.Bxc6#
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qa5#
      • 1...Qxd8
        • 2.Bxc6#
      • 1...a5
        • 2.Qxa5#
      • 1...Qc7
        • 2.Qxd3#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Sc7
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(f);N_GUARD,XP(E)::B(C),XP(e)
    • Q(f);N_GUARD::B(C),XP(e)
    • Q(f);N_GUARD,P_PINP(D)::B(C),XP(e)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • Q(f);N_GUARD,XQ(F)::B(C),XP(e)
      • P(d);::QAR1(F),XP(d)
      • Q(f);OGATE::QAB(F),XP(b)
      • S(g);N_GUARD::QAR1(F),XS(g)
      • S(g);N_GUARD,S_CUTQ(f)::QAR(F)
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