MESON Chess Problem Database

Problem Display
PID: 142421 (Q6K/8/1B2R3/1p1p4/1q1pN1p1/1Np2kP1/5P2/5Bn1 w - - 0 1)

Melvin, Herbert A ('Hamel' or Zaak, HA)

Stratford Express, 1944

(First published on Fri Sep 15 1944)

Q6K/8/1B2R3/1p1p4/1q1pN1p1/1Np2kP1/5P2/5Bn1

#2

9 + 8

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sxd4#
    • 1...Qa5
      • 2.Sxd4#
      • 2.Qf8#
    • 1...Qd6
      • 2.Sxd4#
    • 1...Qe7
      • 2.Sxd4#
    • 1...Qf8+
      • 2.Qxf8#
    • 1...Qxb3
      • 2.Qf8#
    • 1...Qa4
      • 2.Qf8#
    • 1...Qc4
      • 2.Qf8#
    • 1...d3
      • 2.Sg5#
    • 1...dxe4
      • 2.Rf6#
  • Keys
    • 1.Qa3!
      • threat
        • 2.Sbd2#
      • 1...Qf8+
        • 2.Qxf8#
      • 1...Qxa3
        • 2.Sxd4#
      • 1...Qxb3
        • 2.Qf8#
      • 1...dxe4
        • 2.Rf6#
      • 1...d3
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(d);N_GUARD::S(C),XP(e)
    • Q(d);CHECK,N_GUARD::QAR(H),XQ(d)
    • Q(d);N_GUARD,XS(C)::QAR(H)
    • Q(d);N_GUARD::QAR(H)
    • P(e);::S(E)
    • P(h);P_SPINP(h),XS(E)::R(G)
  • Actual
    • Q(H);
    • Threat
      • S(C)
    • Vars
      • Q(d);CHECK,OGATE::QAR(H),XQ(d)
      • Q(d);N_GUARD,XQ(H)::S(C),XP(e)
      • Q(d);OGATE,XS(C)::QAR(H)
      • P(h);SBLOCK,XS(E)::R(G)
      • P(e);::S(E)
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