MESON Chess Problem Database

Problem Display
PID: 213899 (k2N4/2K3Q1/8/3b4/7r/8/8/6B1 w - - 0 1)

Curth, Heinz

Deutsche Schachzeitung, 1980

k2N4/2K3Q1/8/3b4/7r/8/8/6B1

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qa1#
  • Tries
    • 1.Qa1+?
      • 1...Ra4
        • 2.Qxa4#
      • 1...Ba2!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Sc6#
        • 2.Se6#
        • 2.Sb7#
        • 2.Sf7#
      • 1...Rc4+
        • 2.Sc6#
      • 1...Rh7+
        • 2.Sf7#
      • 1...Rd4
        • 2.Sc6#
      • 1...Rb4
        • 2.Sb7#
      • 1...Re4
        • 2.Se6#
      • 1...Rf4
        • 2.Sf7#
      • 1...Rh8
        • 2.Qa3#
      • 1...Bc6
        • 2.Sxc6#
      • 1...Be6
        • 2.Sxe6#
      • 1...Bb7
        • 2.Sxb7#
      • 1...Bf7
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • B(b);N_GUARD,S_CUTR(a)::QAB(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR(C),XR(a)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • Q(C);
    • Threat
      • DUALS(4)
    • Vars
      • R(a);CHECK::QAR(C)+S(D)
      • R(a);CHECK,SBLOCK::QAR(C)+S(D)
      • R(a);::QAR(C)+S(D)
      • R(a);N_GUARD,SBLOCK::QAR(C)
      • B(b);::QAR(C)+S(D),XB(b)
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