MESON Chess Problem Database

Problem Display
PID: 147100 (8/Q2p4/8/pp1P4/k7/8/K7/8 w - - 0 1)

Lincoln, Robert A

Australian Chess Problem Magazine TT, 1996

8/Q2p4/8/pp1P4/k7/8/K7/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Qd4#
    • 1...b4
      • 2.Qxd7#
  • Tries
    • 1.Kb2?
      • 1...Kb4
        • 2.Qd4#
      • 1...b4
        • 2.Qxd7#
      • 1...d6!
    • 1.Qe3?
      • threat
        • 2.Qa3#
        • 2.Qb3#
      • 1...Kb4
        • 2.Qd4#
      • 1...b4!
  • Keys
    • 1.d6!
      • 1...Kb4
        • 2.Qd4#
      • 1...b4
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINP(b),P-FLIGHT::QAR2(C)
    • P(c);OGATEB,SBLOCK::QAB(C),XP(d)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR2(C)
        • P(c);OGATEB,SBLOCK::QAB(C),XP(d)
      • Refutation
        • P(d);
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • P(c);
  • Actual
    • P(B);
    • Vars
      • K(a);N_SPINP(b),P-FLIGHT::QAR2(C)
      • P(c);OGATEB,SBLOCK::QAB(C),XP(d)
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