MESON Chess Problem Database

Problem Display
PID: 377 (4n3/3kbPn1/4N2R/4P2Q/K1RP4/1B6/8/8 w - - 0 1)

Mansfield, Comins

The Observer, 1937

(First published on Sun Dec 12 1937)

4n3/3kbPn1/4N2R/4P2Q/K1RP4/1B6/8/8

#2

9 + 4

3550 Complete Mansfield/II 1997
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.fxe8Q#
      • 2.fxe8B#
    • 1...Sxe6
      • 2.fxe8Q#
    • 1...Sd6
      • 2.Rc7#
    • 1...Sf6
      • 2.Rc7#
    • 1...Sc7
      • 2.Rxc7#
  • Keys
    • 1.Rh7!
      • 1...Kxe6
        • 2.Rc7#
      • 1...Sxh5
        • 2.f8S#
      • 1...Sxe6
        • 2.fxe8Q#
      • 1...Ba3
        • 2.fxe8Q#
      • 1...Bb4
        • 2.fxe8Q#
      • 1...Bh4
        • 2.fxe8Q#
      • 1...Bc5
        • 2.fxe8Q#
      • 1...Bg5
        • 2.fxe8Q#
      • 1...Bd6
        • 2.fxe8Q#
      • 1...Bf6
        • 2.fxe8Q#
      • 1...Bd8
        • 2.fxe8Q#
      • 1...Bf8
        • 2.fxe8Q#
      • 1...Sc7
        • 2.Rxc7#
      • 1...Sf5
        • 2.f8S#
      • 1...Sd6
        • 2.Rc7#
      • 1...Sf6
        • 2.Rc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::PXS(d)=Q
    • S(c);N_GUARD,XS(G)::PXS(d)=Q
    • S(d);N_GUARD::R1(C)
    • S(d);N_GUARD::R1(C),XS(d)
  • Actual
    • R(H);
    • Vars
      • K(a);S_FLIGHT,XS(G)::B(A)+R(C)
      • S(c);S_CUTB(b),XQ(F)::P=S
      • S(c);N_GUARD,SBLOCK,XS(G)::PXS(d)=Q
      • B(b);S_CUTS(c)::PXS(d)=Q
      • S(d);N_GUARD::R1(C),XS(d)
      • S(c);S_CUTB(b)::P=S
      • S(d);N_GUARD::R1(C)
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