MESON Chess Problem Database

Problem Display
PID: 122950 (8/6Q1/2q5/1P1Np3/1b2k1P1/2p1Pp2/2K2P2/8 w - - 0 1)

Ferber, Eugene

Wiener Schachzeitung, 1903

(First published on Thu Jan 1 1903)

8/6Q1/2q5/1P1Np3/1b2k1P1/2p1Pp2/2K2P2/8

#2

7 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5
      • 2.Sf6#
    • 1...Qxd5
      • 2.Qg6#
      • 2.Qh7#
    • 1...Qb7
      • 2.Sf6#
    • 1...Qd7
      • 2.Sf6#
    • 1...Qa8
      • 2.Sf6#
    • 1...Qe8
      • 2.Sf6#
    • 1...Qc4
      • 2.Sf6#
    • 1...Qc5
      • 2.Sf6#
    • 1...Qf6
      • 2.Sxf6#
    • 1...Qc7
      • 2.Sf6#
    • 1...Qc8
      • 2.Sf6#
    • 1...Bc5
      • 2.Sxc3#
    • 1...Bd6
      • 2.Sf6#
  • Tries
    • 1.Qg6+?
      • 1...Kxd5
        • 2.Qxc6#
      • 1...Qxg6!
    • 1.Qh7+?
      • 1...Qg6
        • 2.Sf6#
      • 1...Kxd5!
    • 1.bxc6?
      • threat
        • 2.Sf6#
      • 1...Be7
        • 2.Sxc3#
      • 1...Kxd5!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Sf6#
      • 1...Kxd5
        • 2.Qxc6#
      • 1...Qxd5
        • 2.Qh7#
      • 1...Qf6
        • 2.Sxc3#
        • 2.Sxf6#
      • 1...Be7
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • Q(f);N_GUARD,XP(E)::S(F)
    • Q(f);N_GUARD::S(F)
    • Q(f);N_GUARD::S(F),XQ(f)
    • B(c);N_GUARD,S_CUTQ(f)::S(F),XP(a)
    • B(c);S_CUTQ(f)::S(F)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(F)::QAB1(G),XQ(f)
      • Refutation
        • Q(f);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • Q(f);P_SPINQ(f)::S(F)
      • Refutation
        • K(d);S_FLIGHT,XS(F)
    • Try
      • P(E);XQ(f)
      • Threat
        • S(F)
      • Vars
        • B(c);N_GUARD::S(F),XP(a)
      • Refutation
        • K(d);S_FLIGHT,XS(F)
  • Actual
    • Q(G);
    • Threat
      • S(F)
    • Vars
      • K(d);OGATEB,P_SPINQ(f),S_FLIGHT,XS(F)::QAB1(G),XQ(f)
      • Q(f);N_GUARD,P_SPINQ(f),SBLOCK,XS(F)::QAB(G)
      • B(c);N_GUARD::S(F),XP(a)
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