MESON Chess Problem Database

Problem Display
PID: 268325 (3N4/1p6/5R1n/1n1pkB2/R3Np2/1KP5/1Q6/8 w - - 0 1)

Holroyd, GC

Sunday Referee, 1929

(First published on Sun Apr 21 1929)

3N4/1p6/5R1n/1n1pkB2/R3Np2/1KP5/1Q6/8

#2

8 + 6

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4+
      • 2.cxd4#
    • 1...Sg4
      • 2.Sf7#
    • 1...Sxf5
      • 2.Sf7#
      • 2.Re6#
    • 1...Sf7
      • 2.Sxf7#
    • 1...Sg8
      • 2.Sf7#
    • 1...f3
      • 2.Qh2#
    • 1...b6
      • 2.Sc6#
  • Keys
    • 1.Ra5!
      • 1...Sd4+
        • 2.cxd4#
      • 1...Sxc3
        • 2.Qxc3#
      • 1...Sxf5
        • 2.Re6#
      • 1...dxe4
        • 2.c4#
      • 1...f3
        • 2.Qh2#
      • 1...d4
        • 2.Rxb5#
      • 1...Sa3
        • 2.c4#
      • 1...Sd6
        • 2.c4#
      • 1...Sa7
        • 2.c4#
      • 1...Sc7
        • 2.c4#
      • 1...Sg4
        • 2.Sf7#
      • 1...Sf7
        • 2.Sxf7#
      • 1...Sg8
        • 2.Sf7#
      • 1...b6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(b);CHECK,OGATE::P(C),XS(b)
    • S(e);N_GUARD::S(H)
    • S(e);N_GUARD::S(H),XS(e)
    • P(a);OGATEB::QAB(A)
    • P(f);N_GUARD::S(H)
  • Actual
    • R(D);
    • Vars
      • S(b);CHECK,OGATE,P_SPINP(c)::P(C),XS(b)
      • S(b);OGATE,P_SPINP(c),P_SPINS(b),XP(C)::QAB(A),XS(b)
      • S(e);SBLOCK,XB(F)::R1(G)
      • P(c);N_GUARD,P_SPINS(b),XS(E)::QAB(A)+P(C)
      • P(a);OGATEB::QAB(A)
      • P(c);OGATEB,P_SPINS(b)::R(D),XS(b)
      • S(b);N_GUARD,P_SPINP(c)::QAB(A)+P(C)
      • S(e);N_GUARD::S(H)
      • S(e);N_GUARD::S(H),XS(e)
      • P(f);N_GUARD::S(H)
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