MESON Chess Problem Database

Problem Display
PID: 270662 (6K1/1p5B/1p4R1/n1nk2qQ/1B2Np2/4pN2/2R5/6r1 w - - 0 1)

Eddy, Edwin John

The Observer, 1959

(First published on Sun May 3 1959)

6K1/1p5B/1p4R1/n1nk2qQ/1B2Np2/4pN2/2R5/6r1

#2

8 + 9

17397 Ling Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Rxg5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Sc4
      • 2.Sc3#
    • 1...Se6
      • 2.Sf6#
  • Tries
    • 1.Rxc5+?
      • 1...Kxe4
        • 2.Rgxg5#
      • 1...bxc5!
  • Keys
    • 1.Kh8!
      • threat
        • 2.Rd6#
      • 1...Qe5+
        • 2.Qxe5#
      • 1...Kxe4
        • 2.Rxg5#
      • 1...Sxe4
        • 2.Bg8#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Sc4
        • 2.Sc3#
      • 1...Se6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);N_GUARD,N_SPINQ(g),S_CUTR(a),S_FLIGHT,XS(D)::B(G)+R(F),XQ(g)
    • Q(g);OGATE::QAR1(E),XQ(g)
    • Q(g);OGATE::QAR2(E),XQ(g)
    • S(d);SBLOCK::S(D)
    • S(e);SBLOCK::S(D)
  • Tries
    • Try
      • R(A);CHECK,XS(e)
      • Vars
        • K(f);N_GUARD,N_SPINQ(g),S_FLIGHT,XS(D)::B(G)+R(F),XQ(g)
      • Refutation
        • P(h);XR(A)
  • Actual
    • K(H);N_SPINR(F),P-FLIGHT
    • Threat
      • R1(F)
    • Vars
      • Q(g);CHECK,OGATE::QAR1(E),XQ(g)
      • K(f);N_GUARD,N_SPINQ(g),S_CUTR(a),S_FLIGHT,XS(D)::B(G)+R(F),XQ(g)
      • S(e);N_GUARD,SBLOCK,XS(D)::B(G)
      • Q(g);OGATE::QAR2(E),XQ(g)
      • S(d);SBLOCK::S(D)
      • S(e);SBLOCK::S(D)
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