MESON Chess Problem Database

Problem Display
PID: 11753 (4Q2K/2p5/3P3R/1r1k1p2/1p1N1R2/5P2/3P3B/2r2b2 w - - 0 1)

Klug, Helmut

Zucker, Manfred

Schach-Echo, 1971

4Q2K/2p5/3P3R/1r1k1p2/1p1N1R2/5P2/3P3B/2r2b2

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qxb5#
    • 1...Kc5
      • 2.Qc6#
    • 1...Rcc5
      • 2.Qe6#
    • 1...Rbc5
      • 2.Qe6#
    • 1...c5
      • 2.Qe6#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Rd4#
      • 1...Rc4
        • 2.Rxf5#
      • 1...c5!
    • 1.Rxf5+?
      • 1...Kxd4
        • 2.Qe4#
      • 1...Kc4!
    • 1.Qc6+?
      • 1...Ke5
        • 2.Re4#
        • 2.Re6#
      • 1...Rxc6!
    • 1.Qf7+?
      • 1...Ke5
        • 2.Re4#
        • 2.Qe6#
        • 2.Qxf5#
      • 1...Kc5!
    • 1.Qe5+?
      • 1...Kc4
        • 2.Qxb5#
      • 1...Kxe5!
    • 1.Qg8+?
      • 1...Ke5
        • 2.Re4#
        • 2.Qe6#
      • 1...Kc5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Rd4#
      • 1...Ke5
        • 2.Sxc7#
      • 1...Kxd6
        • 2.Rd4#
      • 1...Rc4
        • 2.Rxf5#
      • 1...c5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • K(e);S_FLIGHT::QAB1(H),XR(d)
    • K(e);P-FLIGHT::QAR1(H)
    • R(a);SBLOCK::QAB1(H)
    • R(d);SBLOCK::QAB1(H)
    • P(g);SBLOCK::QAB1(H)
  • Tries
    • Try
      • S(D);
      • Threat
        • R1(E)
      • Vars
        • R(a);SBLOCK::R(E),XP(f)
      • Refutation
        • P(g);
    • Try
      • R(E);CHECK,XP(f)
      • Vars
        • K(e);P-FLIGHT,XS(D)::QAR1(H)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Refutation
        • R(a);XQ(H)
    • Try
      • Q(H);CHECK
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::QAB1(H),XR(d)
      • Refutation
        • K(e);P-FLIGHT,XQ(H)
    • Try
      • Q(H);CHECK
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • R1(E)
    • Vars
      • K(e);P-FLIGHT::QAR(H)+S(D),XP(g)
      • K(e);P-FLIGHT,XP(F)::B(B)+R(E),DCHECK
      • R(a);SBLOCK::R(E),XP(f)
      • P(g);SBLOCK,S_CUTR(a)::S(D)
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