MESON Chess Problem Database

Problem Display
PID: 142463 (2N2NKb/r5n1/2p5/2k5/np1pP3/3B4/2P5/Q7 w - - 0 1)

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

Rush, Victor

Stratford Express, 1933

2N2NKb/r5n1/2p5/2k5/np1pP3/3B4/2P5/Q7

#2

7 + 8

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Sd7#
    • 1...Ra6
      • 2.Sd7#
    • 1...Rd7
      • 2.Sxd7#
    • 1...Ra8
      • 2.Sd7#
    • 1...Sb2
      • 2.Qxa7#
    • 1...Sc3
      • 2.Qxa7#
    • 1...Sf5
      • 2.Se6#
    • 1...Sh5
      • 2.Se6#
    • 1...Se6
      • 2.Sxe6#
    • 1...Se8
      • 2.Se6#
    • 1...b3
      • 2.Qa3#
  • Tries
    • 1.Qa2?
      • threat
        • 2.Qc4#
      • 1...b3
        • 2.Qa3#
      • 1...Sb2
        • 2.Qxa7#
      • 1...Sb6!
    • 1.Qxa4?
      • threat
        • 2.Qxa7#
      • 1...Rxa4
        • 2.Sd7#
      • 1...Ra5
        • 2.Sd7#
        • 2.Qxa5#
      • 1...Ra6
        • 2.Sd7#
      • 1...Rc7
        • 2.Qa5#
      • 1...Rd7
        • 2.Sxd7#
        • 2.Qa5#
      • 1...Re7
        • 2.Qa5#
      • 1...Rf7
        • 2.Qa5#
      • 1...Ra8
        • 2.Sd7#
      • 1...b3
        • 2.Qc4#
      • 1...Rb7!
  • Keys
    • 1.c3!
      • threat
        • 2.cxd4#
      • 1...Sxc3
        • 2.Qxa7#
      • 1...bxc3
        • 2.Qa3#
      • 1...dxc3
        • 2.Qg1#
      • 1...Rd7
        • 2.Sxd7#
      • 1...Sb2
        • 2.Qxa7#
      • 1...Sf5
        • 2.Se6#
      • 1...Sh5
        • 2.Se6#
      • 1...Se6
        • 2.Sxe6#
      • 1...Se8
        • 2.Se6#
      • 1...b3
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD::S(F)
    • R(f);N_GUARD::S(F),XR(f)
    • S(a);OGATE::QAB(A),XR(f)
    • S(g);N_GUARD::S(F)
    • S(g);N_GUARD::S(F),XS(g)
    • P(b);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(b);OGATEB::QAB(A)
        • S(a);OGATE::QAB(A),XR(f)
      • Refutation
        • S(a);
    • Try
      • Q(A);XS(a)
      • Threat
        • QAB(A),XR(f)
      • Vars
        • R(f);N_GUARD,XQ(A)::S(F)
        • R(f);N_GUARD::S(F)
        • R(f);N_GUARD::QAR2(A)
        • P(b);OGATE::QAR1(A)
      • Refutation
        • R(f);
  • Actual
    • P(B);
    • Threat
      • P(B),XP(c)
    • Vars
      • S(a);OGATE,XP(B)::QAB(A),XR(f)
      • P(b);OGATEB,XP(B)::QAB(A)
      • P(c);OGATEB,XP(B)::QAB(A)
      • R(f);N_GUARD::S(F),XR(f)
      • S(a);OGATE::QAB(A),XR(f)
      • S(g);N_GUARD::S(F)
      • S(g);N_GUARD::S(F),XS(g)
      • P(b);OGATEB::QAB(A)
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