MESON Chess Problem Database

Problem Display
PID: 198960 (1nQ1N3/3p1K2/2p5/Rp1k4/1p1N1P2/1P2P3/4P3/6B1 w - - 0 1)

Kupper, Josef

Schach-Aktiv, 2006

1nQ1N3/3p1K2/2p5/Rp1k4/1p1N1P2/1P2P3/4P3/6B1

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sf6#
    • 1...Kc5
      • 2.Rxb5#
    • 1...d6
      • 2.Qf5#
  • Tries
    • 1.Ke7?
      • 1...Ke4
        • 2.Sf6#
      • 1...Kc5
        • 2.Rxb5#
      • 1...c5
        • 2.Sf6#
      • 1...d6
        • 2.Qf5#
      • 1...Sa6!
    • 1.Qc7?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Sf6#
        • 2.Qe5#
      • 1...Kc5
        • 2.Rxb5#
      • 1...d6!
    • 1.e4+?
      • 1...Kc5
        • 2.Sc2#
        • 2.Sf3#
        • 2.Sxb5#
        • 2.Sf5#
        • 2.Sxc6#
        • 2.Se6#
        • 2.Rxb5#
      • 1...Kxe4!
  • Keys
    • 1.Sxb5!
      • threat
        • 2.Sc3#
      • 1...Ke4
        • 2.Sbd6#
      • 1...Kc5
        • 2.e4#
      • 1...cxb5
        • 2.Qc4#
      • 1...c5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINP(b),S_FLIGHT::S(J)
    • K(c);P-FLIGHT::R1(G),XP(b)
    • P(e);OGATE::QAR2(I)
  • Tries
    • Try
      • K(H);P-FLIGHT
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::S(J)
        • K(c);P-FLIGHT::R1(G),XP(b)
        • P(d);N_SPINP(b)::S(J)
        • P(e);OGATE::QAR2(I)
      • Refutation
        • S(f);
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • K(c);P-FLIGHT::R1(G),XP(b)
      • Refutation
        • P(e);
    • Try
      • P(D);CHECK
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT,XP(D)
  • Actual
    • S(E);XP(b)
    • Threat
      • R(G)+S(E),DCHECK
    • Vars
      • K(c);S_FLIGHT::S(E)
      • K(c);P-FLIGHT,P_SPINP(d)::B(A)+P(D)
      • P(d);OGATE,P_SPINP(d),XS(E)::QAB1(I)
      • P(d);::S(J)
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Developed and maintained by Brian Stephenson.
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