MESON Chess Problem Database

Problem Display
PID: 135450 (8/7Q/3p4/2NrN1P1/Pn1k4/1B6/3P4/1K6 w - - 0 1)

Kupper, Josef

Prize, Freie Presse, 2005

8/7Q/3p4/2NrN1P1/Pn1k4/1B6/3P4/1K6

#2

8 + 4

23 Die Schwalbe 2009
15527 schachkunst (1997-2010) (Hoffmann) 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qa7#
    • 1...Kxe5
      • 2.Qe4#
    • 1...Rxc5
      • 2.Sf3#
    • 1...dxc5
      • 2.Sf3#
    • 1...dxe5
      • 2.Se6#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Sf3#
        • 2.Qc3#
      • 1...Kxe5
        • 2.Qe4#
      • 1...Rxc5
        • 2.Sf3#
      • 1...Rxe5
        • 2.Qc3#
        • 2.Qc4#
      • 1...dxc5
        • 2.Sf3#
      • 1...dxe5
        • 2.Se6#
        • 2.Qc3#
        • 2.Qc4#
      • 1...Sa2
        • 2.Sf3#
        • 2.Sc6#
      • 1...Sxc2!
    • 1.Qh4+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kxc5!
  • Keys
    • 1.Qf7!
      • 1...Kxc5
        • 2.Qa7#
      • 1...Kxe5
        • 2.Qf6#
      • 1...Rxc5
        • 2.Qf4#
      • 1...Rxe5
        • 2.Qc4#
      • 1...dxc5
        • 2.Qf4#
      • 1...dxe5
        • 2.Qf2#
      • 1...Sa2
        • 2.Qxd5#
      • 1...Sc2
        • 2.Qxd5#
      • 1...Sd3
        • 2.Qxd5#
      • 1...Sa6
        • 2.Qxd5#
      • 1...Sc6
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(E)::QAB(H)
    • K(b);S_FLIGHT,XS(F)::QAR1(H)
    • R(c);SBLOCK,XS(E)::S(F)
    • P(d);SBLOCK,XS(E)::S(F)
    • P(d);SBLOCK,XS(F)::S(E)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT,XS(F)::QAR1(H)
        • R(c);XS(E)::S(F)
        • P(d);XS(E)::S(F)
      • Refutation
        • S(a);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(F)::QAR1(H)
      • Refutation
        • K(b);S_FLIGHT,XS(E)
  • Actual
    • Q(H);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(E)::QAB(H)
      • K(b);OGATEB,S_FLIGHT,XS(F)::QAB1(H)
      • R(c);SBLOCK,XS(E)::QAR2(H)
      • R(c);OGATE,SBLOCK,XS(F)::QAR1(H)
      • P(d);SBLOCK,XS(E)::QAR2(H)
      • P(d);SBLOCK,XS(F)::QAB(H)
      • S(a);N_GUARD::QAR1(H),XR(c)
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