MESON Chess Problem Database

Problem Display
PID: 23045 (8/2K5/8/pk6/1P6/2P5/Q2P4/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/2K5/8/pk6/1P6/2P5/Q2P4/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ka6
      • 2.Qxa5#
  • Tries
    • 1.Kb7?
      • 1...a4
        • 2.Qd5#
      • 1...axb4!
    • 1.Qd5+?
      • 1...Ka6
        • 2.Qb7#
        • 2.Qxa5#
      • 1...Ka4!
    • 1.d3?
      • threat
        • 2.Qxa5#
      • 1...Ka6
        • 2.Qxa5#
      • 1...a4
        • 2.Qc4#
      • 1...axb4!
    • 1.c4+?
      • 1...Ka6
        • 2.Qxa5#
      • 1...Kxb4!
  • Keys
    • 1.d4!
      • 1...Ka6
        • 2.Qxa5#
      • 1...axb4
        • 2.c4#
      • 1...a4
        • 2.Qe2#

FEATURES

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