MESON Chess Problem Database

Problem Display
PID: 196589 (8/1N2Np2/1n2p3/6R1/b2kP3/1P2R3/6K1/2B5 w - - 0 1)

Holroyd, GC

The Observer, 1943

(First published on Sun Oct 24 1943)

8/1N2Np2/1n2p3/6R1/b2kP3/1P2R3/6K1/2B5

#2

8 + 5

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6
      • 2.Sxc6#
    • 1...e5
      • 2.Sf5#
  • Tries
    • 1.Rd3+?
      • 1...Kxe4
        • 2.Sc5#
      • 1...Kxd3!
  • Keys
    • 1.Rg4!
      • threat
        • 2.e5#
      • 1...Ke5
        • 2.Bb2#
      • 1...Bc6
        • 2.Sxc6#
      • 1...Sd5
        • 2.exd5#
      • 1...e5
        • 2.Sf5#
      • 1...f5
        • 2.exf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD,P_PINP(E)::S(H),XB(a)
    • P(d);N_GUARD,SBLOCK::S(H)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(E)::S(G)
      • Refutation
        • K(b);P-FLIGHT,XR(D)
  • Actual
    • R(F);
    • Threat
      • R(F)+P(E)
    • Vars
      • K(b);S_FLIGHT::B(A)
      • B(a);N_GUARD,P_PINP(E)::S(H),XB(a)
      • S(c);OGATE::R(F)+P(E),XS(c)
      • P(d);N_GUARD,SBLOCK::S(H)
      • P(e);OGATE::R(F)+P(E),XP(e)
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