MESON Chess Problem Database

Problem Display
PID: 40782 (2B5/3N4/3n4/Np1pR1B1/nr1kP3/Q1b5/1pR5/1K6 w - - 0 1)

Butcher, FG

The Observer, 1960

(First published on Sun Jul 3 1960)

2B5/3N4/3n4/Np1pR1B1/nr1kP3/Q1b5/1pR5/1K6

#2

9 + 8

136 Problem Observer 1972
17397 Ling Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Rd2#
    • 1...Be1
      • 2.Sc6#
      • 2.Be3#
      • 2.Qe3#
    • 1...Bd2
      • 2.Sc6#
      • 2.Rxd2#
    • 1...Sc5
      • 2.Qxc3#
    • 1...Sb6
      • 2.Qxc3#
  • Keys
    • 1.Sf6!
      • threat
        • 2.Rxd5#
      • 1...Kd3
        • 2.Rd2#
      • 1...Kc5
        • 2.Be3#
      • 1...Kxe5
        • 2.Sc6#
      • 1...dxe4
        • 2.Rd5#
      • 1...Sb6
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(e);P-FLIGHT,P_SPINB(b)::R1(B)
    • S(c);N_GUARD::QAB1(C),XB(b)
  • Actual
    • S(H);
    • Threat
      • R1(F),XP(g)
    • Vars
      • K(e);P-FLIGHT,P_SPINB(b)::R1(B)
      • K(e);P_SPINB(b),P_SPINP(g),P_SPINR(d),S_FLIGHT::B(G)
      • K(e);S_FLIGHT,XR(F)::S(E)
      • P(g);XP(D)::R1(F)
      • S(c);N_GUARD::QAB1(C),XB(b)
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