MESON Chess Problem Database

Problem Display
PID: 176172 (8/2Q5/3P4/3k4/3N4/2p3K1/2N5/8 w - - 0 1)

Lindemann, Gerhard

Schach-Echo, 1962

8/2Q5/3P4/3k4/3N4/2p3K1/2N5/8

#2

5 + 2

6490 yacpdb 2018
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qa5+?
      • 1...Kc4
        • 2.Qb5#
      • 1...Ke4
        • 2.Qf5#
      • 1...Kxd6!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Kxc5!
    • 1.Qc8?
      • 1...Ke4
        • 2.Qf5#
      • 1...Ke5
        • 2.Qe6#
      • 1...Kxd6!
  • Keys
    • 1.Qd7!
      • 1...Kc4
        • 2.Qb5#
      • 1...Ke4
        • 2.Qf5#
      • 1...Kc5
        • 2.Qc6#
      • 1...Ke5
        • 2.Qe6#

Anticipated by 79524(1940)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
        • K(b);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);P-FLIGHT,XP(D)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);P-FLIGHT,XQ(E)
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
        • K(b);P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT,XP(D)
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::QAB1(E)
      • K(b);P-FLIGHT::QAR1(E)
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