MESON Chess Problem Database

Problem Display
PID: 382 (6b1/5r2/B7/8/K3p2q/3nr3/R2Nk2P/Q3N3 w - - 0 1)

Mansfield, Comins

The Observer, 1938

(First published on Sun Dec 18 1938)

6b1/5r2/B7/8/K3p2q/3nr3/R2Nk2P/Q3N3

#2

7 + 7

3550 Complete Mansfield/II 1997
4054 Complete Mansfield/III 1999
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Sb3#
  • Keys
    • 1.Sef3!
      • threat
        • 2.Qf1#
      • 1...exf3+
        • 2.Se4#
      • 1...Kf2
        • 2.Qf1#
      • 1...Rexf3
        • 2.Sf1#
      • 1...Rfxf3
        • 2.Sb3#
      • 1...Qe1
        • 2.Qxe1#
      • 1...Qf2
        • 2.Sd4#
      • 1...Qh3
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(f);SBLOCK::R(C)+S(D)
  • Actual
    • S(B);
    • Threat
      • QAB1(A)
    • Vars
      • P(d);CHECK,SBLOCK,XS(B)::R(C)+S(D)
      • K(a);N_SPINS(b),P-FLIGHT::QAR1(A)
      • R(c);SBLOCK,XS(B)::R(C)+S(D)
      • R(f);SBLOCK,XS(B)::R(C)+S(D)
      • Q(e);N_GUARD::QAR1(A),XQ(e)
      • Q(e);SBLOCK::S(B)
      • Q(e);N_GUARD::QAR1(A)
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