MESON Chess Problem Database

Problem Display
PID: 11925 (8/2K5/4p3/2pk2n1/8/2P5/4QN2/8 w - - 0 1)

di Vincenzi, Renato

Unpublished, 1973

8/2K5/4p3/2pk2n1/8/2P5/4QN2/8

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qe4#
    • 1...Sh3
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sf7
      • 2.Qe4#
    • 1...Sh7
      • 2.Qe4#
  • Tries
    • 1.Kd7?
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf3
        • 2.Qe4#
        • 2.Qxe6#
      • 1...Sh3
        • 2.Qe4#
        • 2.Qxe6#
      • 1...Sf7
        • 2.Qe4#
        • 2.Qxe6#
      • 1...Sh7
        • 2.Qe4#
        • 2.Qxe6#
      • 1...e5
        • 2.Qd3#
      • 1...c4!
    • 1.Sg4?
      • threat
        • 2.Sf6#
        • 2.Qd3#
      • 1...c4
        • 2.Qe5#
      • 1...Sf3
        • 2.Sf6#
      • 1...Se4
        • 2.Qd3#
      • 1...Sh7
        • 2.Qd3#
      • 1...e5!
    • 1.Qa2+?
      • 1...c4
        • 2.Qa5#
      • 1...Ke5!
    • 1.Qd2+?
      • 1...Ke5
        • 2.Qxg5#
      • 1...Kc4!
  • Keys
    • 1.Qg4!
      • 1...Ke5
        • 2.Qxg5#
      • 1...Se4
        • 2.Qxe4#
      • 1...c4
        • 2.Qd4#
      • 1...Sf3
        • 2.Qe4#
      • 1...Sh3
        • 2.Qe4#
      • 1...Sf7
        • 2.Qe4#
      • 1...Sh7
        • 2.Qe4#
      • 1...e5
        • 2.c4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAB1(A)
    • S(c);N_GUARD::QAB1(A),XS(c)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • S(c);N_GUARD::QAB1(A),XS(c)
        • P(d);SBLOCK::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);SBLOCK::QAR1(A)
        • S(c);::S(B)
        • S(c);::QAR2(A)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK
      • Vars
        • P(a);OGATEB,P_SPINP(a),SBLOCK::QAR(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XS(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR2(A),XS(c)
      • S(c);N_GUARD::QAB1(A),XS(c)
      • P(a);N_GUARD::QAR1(A)
      • S(c);N_GUARD::QAB1(A)
      • P(d);SBLOCK::P(C)
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