MESON Chess Problem Database

Problem Display
PID: 150673 (b7/7B/3N2R1/1Nnkp3/8/8/1n4K1/2Q5 w - - 0 1)

Eddy, Edwin John

Morning Post, 1933

(First published on Sat Feb 11 1933)

b7/7B/3N2R1/1Nnkp3/8/8/1n4K1/2Q5

#2

6 + 5

5454 Near Snap 2014
14868 Pirnie Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Bg8#
    • 1...Sd3
      • 2.Bg8#
    • 1...Sa4
      • 2.Bg8#
    • 1...Se4
      • 2.Bg8#
    • 1...Sa6
      • 2.Bg8#
    • 1...Sb7
      • 2.Bg8#
    • 1...Sd7
      • 2.Bg8#
  • Tries
    • 1.Bg8+?
      • 1...Se6
        • 2.Bxe6#
      • 1...Kc6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Rd6#
      • 1...Kxe4
        • 2.Rd6#
      • 1...Sxe4
        • 2.Bg8#
      • 1...Sc4
        • 2.Sec3#
      • 1...Se6
        • 2.Sf6#
      • 1...Sb7
        • 2.Qc6#

Anticipated by 101047(1919)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • S(b);N_GUARD::B(F)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::B(F),XS(b)
      • Refutation
        • K(c);P_SPINS(b),S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • R1(E)
    • Vars
      • K(c);S_FLIGHT,XS(D)::B(F)+R(E)
      • S(b);N_GUARD,SBLOCK,XS(D)::B(F)
      • S(a);SBLOCK::S(D)
      • S(b);SBLOCK::S(D)
      • S(b);OGATE::QAB1(A)
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