MESON Chess Problem Database

Problem Display
PID: 271250 (8/1PPPkBK1/q1nnpp2/1pP2p2/8/8/3B4/3Q4 w - - 0 1)

Boswell, Edward

Sunday Referee, 1932

(First published on Sun Dec 11 1932)

8/1PPPkBK1/q1nnpp2/1pP2p2/8/8/3B4/3Q4

#2

8 + 8

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.d8Q#
    • 1...Sd4
      • 2.d8Q#
    • 1...Sa5
      • 2.d8Q#
    • 1...Se5
      • 2.d8Q#
    • 1...Sa7
      • 2.d8Q#
    • 1...Sb8
      • 2.d8Q#
    • 1...Se8+
      • 2.dxe8Q#
  • Keys
    • 1.Ba5!
      • threat
        • 2.Qxd6#
      • 1...Se8+
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Kxd7
        • 2.Qxd6#
      • 1...Sxa5
        • 2.d8Q#
      • 1...Sxb7
        • 2.c8S#
      • 1...Sxf7
        • 2.c8S#
      • 1...Sb4
        • 2.d8Q#
      • 1...Sd4
        • 2.d8Q#
      • 1...Se5
        • 2.d8Q#
      • 1...Sa7
        • 2.d8Q#
      • 1...Sb8
        • 2.d8Q#
      • 1...Sd8
        • 2.cxd8Q#
      • 1...Sc4
        • 2.c8S#
      • 1...Se4
        • 2.c8S#
      • 1...Sc8
        • 2.dxc8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • S(d);N_GUARD::P=Q
    • S(e);CHECK,OGATE::PXS(e)=Q
  • Actual
    • B(B);
    • Threat
      • QAB1(A),XS(e)
    • Vars
      • S(e);CHECK,OGATE::PXS(e)=Q
      • K(h);P-FLIGHT,P_SPINS(e),XP(F)::QAR1(A),XS(e)
      • S(d);N_GUARD,XB(B)::P=Q
      • S(e);N_GUARD,XP(D)::P=S
      • S(e);N_GUARD,XB(G)::P=S
      • S(d);N_GUARD::P=Q
      • S(d);OGATE::PXS(d)=Q
      • S(e);N_GUARD::P=S
      • S(e);OGATE::PXS(e)=S
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