MESON Chess Problem Database

Problem Display
PID: 151583 (8/2Q5/4R3/6p1/2p2p1b/5kP1/7P/6K1 w - - 0 1)

Lobbecke, Oscar

Deutsche Schachzeitung, 1881

8/2Q5/4R3/6p1/2p2p1b/5kP1/7P/6K1

#2

5 + 5

119 Tidskrift for Schack 1909

SOLUTION

  • SOUND
  • Sets
    • 1...g4
      • 2.Qxf4#
      • 2.Qc6#
      • 2.Qb7#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Qe2#
      • 1...fxg3
        • 2.Qe4#
        • 2.Qf5#
      • 1...Kg4!
    • 1.Qxc4?
      • threat
        • 2.Qe2#
      • 1...fxg3
        • 2.Qe4#
      • 1...Kg4!
  • Keys
    • 1.h3!
      • 1...Kxg3
        • 2.Re3#
      • 1...Bxg3
        • 2.Qc6#
        • 2.Qb7#
      • 1...fxg3
        • 2.Qf7#
      • 1...c3
        • 2.Qxc3#
      • 1...g4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);XP(b)
      • Threat
        • QAB1(E)
      • Vars
        • P(c);XP(C)::QAB1(E)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
  • Actual
    • P(B);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(c),XP(C)::R(D)
      • P(c);OGATEB,SBLOCK,XP(C)::QAR(E)
      • P(b);OGATE::QAR(E),XP(b)
      • P(e);N_GUARD::QAR1(E),XP(c)
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