MESON Chess Problem Database

Problem Display
PID: 219482 (8/4P3/pKN1Ppq1/p4Pn1/k1Pp3r/1p2Qp2/NP6/8 w - - 0 1)

Gockel, Hubert

Schach-Report, 1993

8/4P3/pKN1Ppq1/p4Pn1/k1Pp3r/1p2Qp2/NP6/8

#2

9 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...bxa2
      • 2.Qa3#
    • 1...dxe3
      • 2.Sc3#
    • 1...d3
      • 2.Sc3#
  • Tries
    • 1.Sxd4?
      • threat
        • 2.Qxb3#
      • 1...bxa2
        • 2.Qa3#
        • 2.Qb3#
      • 1...Rxd4!
    • 1.Qd2?
      • threat
        • 2.Qxa5#
      • 1...bxa2
        • 2.Qd1#
        • 2.Qc2#
      • 1...Qxf5!
    • 1.Qe1?
      • threat
        • 2.Qxa5#
      • 1...bxa2
        • 2.Qd1#
      • 1...Qxf5!
    • 1.Qc3?
      • threat
        • 2.Qxa5#
      • 1...bxa2
        • 2.Qc2#
        • 2.Qa3#
      • 1...dxc3
        • 2.Sxc3#
      • 1...Qxf5!
  • Keys
    • 1.Qxd4!
      • threat
        • 2.Sc3#
      • 1...bxa2
        • 2.Qd1#
      • 1...Se4
        • 2.c5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • P(a);OGATE,XS(A)::QAR1(C)
    • P(d);N_GUARD,XQ(C)::S(A)
    • P(d);N_GUARD::S(A)
  • Tries
    • Try
      • S(G);XP(d)
      • Threat
        • QAB1(C),XP(a)
      • Refutation
        • R(e);XS(G)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(f)
      • Refutation
        • Q(j);XP(E)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(f)
      • Vars
        • P(a);OGATEB,XS(A)::QAB(C)
      • Refutation
        • Q(j);XP(E)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(f)
      • Vars
        • P(d);XQ(C)::S(A),XP(d)
      • Refutation
        • Q(j);XP(E)
  • Actual
    • Q(C);XP(d)
    • Threat
      • S(A)
    • Vars
      • P(a);OGATEB,XS(A)::QAB(C)
      • S(g);S_CUTR(e)::QAR(C)+P(D)
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