MESON Chess Problem Database

Problem Display
PID: 62092 (3K4/4P3/2p1P2R/2pkp3/3pNpRN/BP6/2P5/6Q1 w - - 0 1)

Forster, Klaus

Die Schwalbe, 1985

3K4/4P3/2p1P2R/2pkp3/3pNpRN/BP6/2P5/6Q1

#2

11 + 6

SOLUTION

  • SOUND
  • Tries
    • 1.Sc3+?
      • 1...Kd6
        • 2.Sf5#
        • 2.e8S#
      • 1...dxc3!
    • 1.Qf1?
      • 1...Kxe4
        • 2.Qf3#
      • 1...d3
        • 2.Qxd3#
      • 1...f3
        • 2.Qc4#
      • 1...c4!
    • 1.e8Q?
      • 1...Kxe4
        • 2.Qxc6#
      • 1...f3
        • 2.Qd7#
      • 1...c4
        • 2.Sf6#
      • 1...d3!
    • 1.e8S?
      • 1...Kxe4
        • 2.Sf6#
      • 1...d3
        • 2.Sc3#
      • 1...f3
        • 2.Sc7#
      • 1...c4!
  • Keys
    • 1.Qd1!
      • 1...Kxe4
        • 2.Qf3#
      • 1...d3
        • 2.Qxd3#
      • 1...f3
        • 2.c4#
      • 1...c4
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • P(a);XS(E)
    • Try
      • Q(A);
      • Vars
        • K(d);OGATEB,P_SPINP(b),S_FLIGHT,XS(E)::QAB1(A)
        • P(a);OGATEB::QAR2(A),XP(a)
        • P(b);::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • P(J);
      • Vars
        • K(d);P_SPINP(b),S_FLIGHT,XS(E)::QAB(J),XP(f)
        • P(b);::QAR2(J)
        • P(c);::S(E)
      • Refutation
        • P(a);
    • Try
      • P(J);
      • Vars
        • K(d);P_SPINP(b),S_FLIGHT,XS(E)::S(J)
        • P(a);N_GUARD::S(E)
        • P(b);::S(J)
      • Refutation
        • P(c);
  • Actual
    • Q(A);P_PINP(a)
    • Vars
      • K(d);N_SPINP(a),OGATEB,P_SPINP(b),S_FLIGHT,XS(E)::QAB1(A)
      • P(a);OGATEB::QAR2(A),XP(a)
      • P(b);::P(B)
      • P(c);::S(E)
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