MESON Chess Problem Database

Problem Display
PID: 120147 (3bK3/3Qp3/8/2n5/8/5RP1/4Np1k/5r1B w - - 0 1)

Ferber, Eugene

Deutsche Schachzeitung, 1909

3bK3/3Qp3/8/2n5/8/5RP1/4Np1k/5r1B

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh1
      • 2.Qh3#
    • 1...Rxh1
      • 2.Rxf2#
  • Tries
    • 1.Rxf2+?
      • 1...Kxh1
        • 2.Qh3#
      • 1...Rxf2!
    • 1.Qe6?
      • threat
        • 2.Qh6#
      • 1...Kxh1
        • 2.Qh3#
      • 1...Rxh1
        • 2.Rxf2#
      • 1...Sxe6!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Rh6#
      • 1...Kxh1
        • 2.Qh3#
      • 1...Rxh1
        • 2.Rxf2#
      • 1...exf6
        • 2.Qh7#
      • 1...e6
        • 2.Qh7#
      • 1...e5
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,XB(A)::QAR2(E)
    • R(a);N_GUARD,SBLOCK,XB(A)::R(C),XP(b)
  • Tries
    • Try
      • R(C);CHECK,XP(b)
      • Vars
        • K(c);P-FLIGHT,XB(A)::QAR2(E)
      • Refutation
        • R(a);XR(C)
    • Try
      • Q(E);
      • Threat
        • QAR(E)
      • Vars
        • K(c);P-FLIGHT,XB(A)::QAR2(E)
        • R(a);N_GUARD,SBLOCK,XB(A)::R(C),XP(b)
      • Refutation
        • S(d);XQ(E)
  • Actual
    • R(C);
    • Threat
      • R(C)
    • Vars
      • K(c);P-FLIGHT,XB(A)::QAR2(E)
      • R(a);N_GUARD,SBLOCK,XB(A)::R(C),XP(b)
      • P(e);OGATE,XR(C)::QAR(E)
      • P(e);OGATE::QAR(E)
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Developed and maintained by Brian Stephenson.
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