MESON Chess Problem Database

Problem Display
PID: 4624 (Q7/3R4/8/8/ppp5/k7/8/1K6 w - - 0 1)

L'Hermet, Johann Georg Rudolf

Magdeburger Schachzeitung, 1884

Q7/3R4/8/8/ppp5/k7/8/1K6

#2

3 + 4

2786 More Fun with Chess Miniatures 2000
145 StrateGems 2012

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.Qf8#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qa2#
        • 2.Qb2#
      • 1...Kb3
        • 2.Qb2#
      • 1...c3
        • 2.Qa2#
      • 1...b3!
    • 1.Qf3+?
      • 1...b3
        • 2.Qf8#
      • 1...c3!
    • 1.Qd5?
      • 1...c3
        • 2.Qa2#
      • 1...b3
        • 2.Qc5#
        • 2.Qd6#
      • 1...Kb3!
    • 1.Qh8?
      • threat
        • 2.Qb2#
      • 1...Kb3
        • 2.Qb2#
      • 1...b3
        • 2.Qf8#
      • 1...c3!
  • Keys
    • 1.Qg8!
      • 1...Kb3
        • 2.Rd3#
      • 1...c3
        • 2.Qa2#
      • 1...b3
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,SBLOCK::QAB(C)
  • Tries
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • P(d);::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • P(c);OGATEB,P_SPINP(c),SBLOCK::QAB(C)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • P(d);OGATE::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(d)
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • P(d);
  • Actual
    • Q(C);N_PINP(b)
    • Vars
      • K(a);P-FLIGHT,P_SPINP(d)::R(B)
      • P(d);OGATE::QAR1(C)
      • P(c);OGATEB,SBLOCK::QAB(C)
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