MESON Chess Problem Database

Problem Display
PID: 224224 (8/8/7p/8/7k/1Q5P/8/4K1N1 w - - 0 1)

Hertzsprung, Severin Carl Ludvig

Nationaltidende, 1888

8/8/7p/8/7k/1Q5P/8/4K1N1

#2

4 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qg8?
      • threat
        • 2.Qg4#
      • 1...Kh5
        • 2.Qg4#
      • 1...h5!
    • 1.Qe3?
      • 1...h5
        • 2.Qf4#
      • 1...Kh5!
    • 1.Qf3?
      • threat
        • 2.Qg4#
      • 1...h5
        • 2.Qf4#
      • 1...Kg5!
    • 1.Qg3+?
      • 1...Kh5
        • 2.Qg4#
      • 1...Kxg3!
  • Keys
    • 1.Qf7!
      • 1...Kg3
        • 2.Qf2#
      • 1...Kg5
        • 2.Sf3#
      • 1...h5
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Vars
        • P(b);SBLOCK::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • P(b);SBLOCK::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::S(B)
      • P(b);SBLOCK::QAR2(C)
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