MESON Chess Problem Database

Problem Display
PID: 181794 (8/6Q1/3pR3/2pB3n/1pP5/2Pk4/8/3K4 w - - 0 1)

Ferber, Eugene

Deutsches Wochenschach, 1905

8/6Q1/3pR3/2pB3n/1pP5/2Pk4/8/3K4

#2

6 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.Qxg3#
    • 1...Sf4
      • 2.Qg3#
    • 1...Sf6
      • 2.Qg3#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Re3#
        • 2.Qe3#
      • 1...bxc3
        • 2.Qe3#
      • 1...Kxc3!
    • 1.Qg2?
      • threat
        • 2.Qf3#
        • 2.Qc2#
        • 2.Qd2#
      • 1...bxc3
        • 2.Qe4#
      • 1...b3
        • 2.Qf3#
        • 2.Qd2#
      • 1...Kxc3!
    • 1.Qg4?
      • threat
        • 2.Qf3#
      • 1...bxc3
        • 2.Qe4#
      • 1...Kxc3!
    • 1.Qg5?
      • threat
        • 2.Re3#
        • 2.Qd2#
        • 2.Qe3#
      • 1...bxc3
        • 2.Qe3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Kxc3!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Rf3#
      • 1...Kxc3
        • 2.Rf3#
      • 1...Ke3
        • 2.Rf3#
      • 1...Sxf6
        • 2.Qg3#
      • 1...Sf4
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(d);N_GUARD::QAR(F),XS(d)
    • S(d);N_GUARD::QAR(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);SBLOCK,XP(B)::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);SBLOCK,XP(B)::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • P(b);SBLOCK,XP(B)::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);SBLOCK,XP(B)::QAR1(F)
        • S(d);N_GUARD::QAR(F)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
  • Actual
    • R(E);
    • Threat
      • R(E)
    • Vars
      • K(a);P-FLIGHT,XP(B)::QAB(F)+R(E),DCHECK
      • K(a);P-FLIGHT::R1(E)
      • S(d);N_GUARD,XR(E)::QAR(F)
      • S(d);N_GUARD::QAR(F)
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Developed and maintained by Brian Stephenson.
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