MESON Chess Problem Database

Problem Display
PID: 365 (4Qn1n/2Np3b/8/5kPR/3Ppp2/7K/8/8 w - - 0 1)

Mansfield, Comins

The Observer, 1934

(First published on Sun Mar 25 1934)

4Qn1n/2Np3b/8/5kPR/3Ppp2/7K/8/8

#2

6 + 7

3550 Complete Mansfield/II 1997
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Qe5#
    • 1...Sfg6
      • 2.Qxd7#
    • 1...Shg6
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sd6#
      • 1...Sf7
        • 2.Qxf7#
      • 1...d6
        • 2.Sxd6#
      • 1...f3!
    • 1.Qxf8+?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Kg6!
  • Keys
    • 1.Sd5!
      • threat
        • 2.g6#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Bg6
        • 2.Qe5#
      • 1...Se6
        • 2.Se7#
      • 1...Sfg6
        • 2.Qxd7#
      • 1...Shg6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(e);SBLOCK::QAR1(F)
    • S(f);N_GUARD,SBLOCK::QAB(F),XP(d)
    • S(g);N_GUARD::QAR2(F)
    • S(g);N_GUARD::QAR2(F),XS(g)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • S(g);N_GUARD::QAR2(F),XS(g)
        • P(d);::S(E),XP(d)
      • Refutation
        • P(b);
    • Try
      • Q(F);CHECK,XS(f)
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR2(F),XS(g)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(E);
    • Threat
      • R(D)+P(C)
    • Vars
      • S(g);N_GUARD::QAR2(F),XS(g)
      • B(e);SBLOCK::QAR1(F)
      • S(f);SBLOCK::S(E)
      • S(f);N_GUARD,SBLOCK::QAB(F),XP(d)
      • S(g);N_GUARD::QAR2(F)
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