MESON Chess Problem Database

Problem Display
PID: 161331 (7K/1Q6/4pNR1/5k2/Rr4p1/4P3/8/8 w - - 0 1)

Planck, Charles

Eastern Daily Press, 1884

(First published on Wed Apr 9 1884)

7K/1Q6/4pNR1/5k2/Rr4p1/4P3/8/8

#2

6 + 4

15351 SCPF/BCPS Black Books 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qe4#
    • 1...Rb2
      • 2.Qe4#
    • 1...Rb3
      • 2.Qe4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Rb5
      • 2.Qe4#
    • 1...Rb6
      • 2.Qe4#
  • Tries
    • 1.Ra5+?
      • 1...Kxg6
        • 2.Qg7#
      • 1...Rb5
        • 2.Qe4#
      • 1...e5!
    • 1.Rg5+?
      • 1...Kxf6
        • 2.Qg7#
      • 1...Kxg5!
    • 1.Qxb4?
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Ra5#
        • 2.Qc5#
        • 2.Qf4#
      • 1...e5
        • 2.Qxg4#
      • 1...Kxg6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Rg5#
      • 1...Ke5
        • 2.Rg5#
      • 1...Kxg6
        • 2.Qh7#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...e5
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::QAB1(E)
    • R(a);N_GUARD::QAB1(E),XR(a)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(D)::QAR1(E)
        • R(a);P_SPINR(a)::QAB1(E)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • R(D);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(C)::QAB1(E)
      • Refutation
        • K(c);P-FLIGHT,XR(D)
    • Try
      • Q(E);XR(a)
      • Threat
        • QAB1(E)
      • Vars
        • P(d);SBLOCK::QAB1(E),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XR(D)
  • Actual
    • S(C);
    • Threat
      • R1(D)
    • Vars
      • K(c);P-FLIGHT::R(D)
      • K(c);OGATEB,S_FLIGHT,XR(D)::QAB1(E)
      • R(a);OGATE,XS(C)::QAB1(E),XR(a)
      • P(d);SBLOCK::R1(D)
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