MESON Chess Problem Database

Problem Display
PID: 412 (K4Nb1/1B4R1/7N/b3pp2/Q3nk2/1R5p/8/1q3rBr w - - 0 1)

Gooderson, Arthur R

The Observer, 1944

(First published on Sun Apr 2 1944)

K4Nb1/1B4R1/7N/b3pp2/Q3nk2/1R5p/8/1q3rBr

#2

8 + 10

3207 A R Gooderson An English Progressive 1996
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Bxh2#
    • 1...Be6
      • 2.Sxe6#
    • 1...Bh7
      • 2.Se6#
  • Tries
    • 1.Qxe4+?
      • 1...fxe4
        • 2.Rg4#
      • 1...Qxe4!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxf5#
      • 1...Be6
        • 2.Sxe6#
      • 1...Bh7
        • 2.Se6#
      • 1...Sd2
        • 2.Be3#
      • 1...Sf2
        • 2.Rf3#
      • 1...Sc3
        • 2.Qd2#
      • 1...Sg3
        • 2.Be3#
      • 1...Sc5
        • 2.Be3#
      • 1...Sg5
        • 2.Sg6#
      • 1...Sd6
        • 2.Be3#
      • 1...Sf6
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • R(c);N_GUARD::B(A),XR(c)
    • B(j);N_GUARD::S(H),XB(j)
    • B(j);N_GUARD::S(H)
  • Tries
    • Try
      • Q(C);CHECK,XS(e)
      • Vars
        • P(i);XQ(C)::R1(F)
      • Refutation
        • Q(a);P_PINB(E),XQ(C)
  • Actual
    • Q(C);N_PINS(e)
    • Threat
      • QAR1(C),XP(i)
    • Vars
      • B(j);N_GUARD::S(H),XB(j)
      • B(j);N_GUARD::S(H)
      • S(e);::B(A)
      • S(e);S_CUTR(b)::R1(B)
      • S(e);N_GUARD,S_CUTB(g)::QAB(C)
      • S(e);SBLOCK::S(H)
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