MESON Chess Problem Database

Problem Display
PID: 151672 (8/1b2NQ2/6p1/6p1/4k3/4pNPP/2Kprq2/3n4 w - - 0 1)

Challenger, Alfred Clement

Hampstead and Highgate Express, 1897

(First published on Sat May 1 1897)

8/1b2NQ2/6p1/6p1/4k3/4pNPP/2Kprq2/3n4

#2

6 + 9

14867 BCPS Library 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qxd5#
    • 1...Ba6
      • 2.Qd5#
    • 1...Bc8
      • 2.Qd5#
    • 1...g4
      • 2.Qf4#
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sd6#
      • 1...Kxf3
        • 2.Qxb7#
      • 1...Qxg3
        • 2.Sxg3#
      • 1...Qxf3
        • 2.Qe6#
      • 1...gxf5
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(i);N_GUARD::QAB1(F),XB(i)
    • B(i);N_GUARD::QAB1(F)
    • P(g);N_GUARD::QAR1(F)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(f);S_FLIGHT,XS(B)::QAB(F),XB(i)
      • Q(d);XP(C)::S(E),XQ(d)
      • Q(d);SBLOCK,XS(B)::QAR2(F)
      • P(h);SBLOCK,XS(E)::QAB(F),XB(i)
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