MESON Chess Problem Database

Problem Display
PID: 15920 (8/4Q3/8/2Npp3/2Pk4/8/3KP3/8 w - - 0 1)

di Vincenzi, Renato

Unpublished, 1989

8/4Q3/8/2Npp3/2Pk4/8/3KP3/8

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...dxc4
      • 2.Qd6#
  • Tries
    • 1.Se6+?
      • 1...Ke4
        • 2.Qh7#
      • 1...Kxc4!
    • 1.Sd7?
      • 1...Ke4
        • 2.Qxe5#
      • 1...dxc4
        • 2.Qxe5#
      • 1...e4
        • 2.Qc5#
      • 1...Kxc4!
    • 1.Qc7?
      • 1...dxc4
        • 2.Qd6#
      • 1...e4
        • 2.Sb3#
        • 2.Se6#
      • 1...Kxc4!
  • Keys
    • 1.Sd3!
      • 1...Kxc4
        • 2.Qb4#
      • 1...Ke4
        • 2.Qxe5#
      • 1...dxc4
        • 2.Qxe5#
      • 1...e4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,SBLOCK,XP(C)::QAR2(E)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB(E)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(c)::QAR1(E),XP(c)
        • P(b);SBLOCK,XP(C)::QAB1(E),XP(c)
        • P(c);SBLOCK::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • Q(E);
      • Vars
        • P(b);OGATEB,SBLOCK,XP(C)::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
  • Actual
    • S(D);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XP(C)::QAR1(E)
      • K(a);P-FLIGHT,P_SPINP(c)::QAR1(E),XP(c)
      • P(b);SBLOCK,XP(C)::QAB1(E),XP(c)
      • P(c);SBLOCK::QAB1(E)
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