MESON Chess Problem Database

Problem Display
PID: 194671 (3r2B1/3p4/N1bk1P2/2r1n1QK/1Np1R3/3p4/8/8 w - - 0 1)

Holroyd, GC

The Observer, 1941

(First published on Sun Feb 9 1941)

3r2B1/3p4/N1bk1P2/2r1n1QK/1Np1R3/3p4/8/8

#2

7 + 8

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qxe5#
    • 1...Sf3
      • 2.Qxc5#
    • 1...Sg4
      • 2.Qxc5#
    • 1...Sg6
      • 2.Qxc5#
    • 1...Sf7
      • 2.Qxc5#
  • Keys
    • 1.f7!
      • threat
        • 2.Qf6#
      • 1...Ke6
        • 2.f8Q#
        • 2.f8B#
      • 1...Sxf7
        • 2.Qxc5#
      • 1...Re8
        • 2.fxe8S#
      • 1...Bd5
        • 2.Qxe5#
      • 1...Sf3
        • 2.Qxc5#
      • 1...Sg4
        • 2.Qxc5#
      • 1...Sg6
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(e);S_CUTR(c)::QAB1(C),XS(d)
    • S(d);OGATE,P_PINQ(C)::QAB1(C),XR(c)
  • Actual
    • P(F);
    • Threat
      • QAR2(C)
    • Vars
      • K(f);P-FLIGHT,P_SPINS(d)::P=Q
      • S(d);OGATE,P_PINQ(C),XP(F)::QAB1(C),XR(c)
      • R(h);OGATE::PXR(h)=S
      • B(e);S_CUTR(c)::QAB1(C),XS(d)
      • S(d);OGATE,P_PINQ(C)::QAB1(C),XR(c)
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