MESON Chess Problem Database

Problem Display
PID: 184170 (1K6/8/1Q2B2p/pP1Np3/2k4r/2p1p3/1rP5/8 w - - 0 1)

Whalley, JR

The Observer, 1927

(First published on Sun Nov 27 1927)

1K6/8/1Q2B2p/pP1Np3/2k4r/2p1p3/1rP5/8

#2

6 + 8

15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Sxe3#
      • 2.Sf4#
      • 2.Sf6#
      • 2.Sc7#
      • 2.Se7#
    • 1...Rd4
      • 2.Qc6#
  • Keys
    • 1.Qd6!
      • threat
        • 2.Sc7#
      • 1...Rxb5+
        • 2.Sb6#
      • 1...Kd4
        • 2.Sf6#
      • 1...Kxb5
        • 2.Sxc3#
      • 1...Rd4
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::QAR2(D)
  • Actual
    • Q(D);P_SPINP(B)
    • Threat
      • B(E)+S(C)
    • Vars
      • R(a);CHECK,SBLOCK,XP(B)::B(E)+S(C),DCHECK
      • K(d);P-FLIGHT::QAR(D)+S(C)
      • K(d);S_FLIGHT,XP(B)::S(C),XP(b)
      • R(e);SBLOCK::QAR2(D)
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