MESON Chess Problem Database

Problem Display
PID: 176186 (Q7/1N2N3/1k1p4/8/K7/1P6/8/8 w - - 0 1)

Betzen, Wolfgang

Schach-Echo, 1967

Q7/1N2N3/1k1p4/8/K7/1P6/8/8

#2

5 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sd8?
      • threat
        • 2.Qa5#
      • 1...Kc5
        • 2.Qa7#
      • 1...Kc7!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qa5#
      • 1...Kxc5
        • 2.Qa7#
      • 1...Kc7
        • 2.Sd5#
      • 1...dxc5
        • 2.Sd5#

Anticipated by 178745(1953)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAB1(E)
    • Vars
      • K(a);S_FLIGHT,XS(C)::QAB(E)
      • K(a);S_FLIGHT::S(D)
      • P(b);SBLOCK,XS(C)::S(D)
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