MESON Chess Problem Database

Problem Display
PID: 207050 (8/8/2p5/Pk6/8/1B6/8/Q3B2K w - - 0 1)

Speyer, Michael

Neue Berliner Schachzeitung, 1864

8/8/2p5/Pk6/8/1B6/8/Q3B2K

#2

5 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qe5#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qb6#
        • 2.Qc4#
      • 1...Ka6
        • 2.Qb6#
      • 1...c5!
    • 1.Qf6?
      • 1...Kc5
        • 2.Qe5#
      • 1...c5
        • 2.Qb6#
      • 1...Ka6!
    • 1.Qa4+?
      • 1...Kc5
        • 2.Qb4#
      • 1...Ka6!
  • Keys
    • 1.Qg7!
      • 1...Kc5
        • 2.Qe5#
      • 1...Ka6
        • 2.Bc4#
      • 1...c5
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);OGATE::QAR1(A)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • K(a);S_FLIGHT::B(D)
      • P(b);SBLOCK::QAR2(A)
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