MESON Chess Problem Database

Problem Display
PID: 163791 (6RK/8/7k/6p1/4Nr2/8/8/3Q4 w - - 0 1)

Elmgren, Bertil Ernst

Basler Nachrichten, 1947

(First published on Sun May 25 1947)

6RK/8/7k/6p1/4Nr2/8/8/3Q4

#2

4 + 3

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Qh1#
    • 1...Rf6
      • 2.Qh1#
    • 1...Rf7
      • 2.Qh1#
    • 1...Rf8
      • 2.Qh1#
    • 1...g4
      • 2.Qh1#
  • Tries
    • 1.Qg4?
      • threat
        • 2.Qxg5#
      • 1...Rf5
        • 2.Qh3#
      • 1...Rxg4!
    • 1.Qg1?
      • threat
        • 2.Qxg5#
      • 1...Kh5
        • 2.Qxg5#
      • 1...Rf5
        • 2.Qh2#
        • 2.Qh1#
      • 1...g4
        • 2.Qh2#
        • 2.Qh1#
      • 1...Rg4!
    • 1.Qd6+?
      • 1...Rf6
        • 2.Qh2#
      • 1...Kh5!
    • 1.Qd7?
      • threat
        • 2.Qh7#
      • 1...Rf7
        • 2.Qh3#
      • 1...Kh5!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Qh5#
      • 1...Rf3
        • 2.Qh1#
      • 1...Rg4
        • 2.Qd6#
      • 1...Rh4
        • 2.Sf5#
        • 2.Qd6#
      • 1...g4
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::QAR(A)
    • R(a);N_GUARD,P_PINR(C)::QAR(A)
    • P(b);S_CUTR(a)::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(b)
      • Vars
        • R(a);N_GUARD::QAR(A)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(b)
      • Vars
        • K(c);P-FLIGHT::QAR1(A),XP(b)
      • Refutation
        • R(a);
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);OGATE,P_SPINR(a)::QAR(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);N_GUARD::QAR(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR1(A)
    • Vars
      • R(a);N_GUARD::QAR(A)
      • P(b);S_CUTR(a)::QAR(A)
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