MESON Chess Problem Database

Problem Display
PID: 226335 (8/1K6/pQ1R1p2/6p1/r1P2kBp/b7/2n2Nr1/3N4 w - - 0 1)

Ferber, Eugene

Deutsche Schachzeitung, 1909

8/1K6/pQ1R1p2/6p1/r1P2kBp/b7/2n2Nr1/3N4

#2

7 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd6
      • 2.Qxd6#
    • 1...Sa1
      • 2.Qe3#
    • 1...Se1
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sb4
      • 2.Qe3#
  • Tries
    • 1.Rxf6+?
      • 1...Ke5
        • 2.Rf5#
      • 1...Kg3!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Rd4#
        • 2.Rxf6#
      • 1...Rb4+
        • 2.Rb6#
      • 1...Kg3
        • 2.Rd3#
      • 1...Ke5
        • 2.Rd5#
      • 1...Rxf2
        • 2.Rd4#
      • 1...Rxg4
        • 2.Rxf6#
      • 1...Bxd6
        • 2.Qxd6#
      • 1...Sd4
        • 2.Rxd4#
        • 2.Rxf6#
      • 1...f5
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • B(c);OGATE,XR(F)::QAB(E),XB(c)
    • S(a);N_GUARD::QAB1(E)
    • S(a);N_GUARD::QAB1(E),XS(a)
  • Tries
    • Try
      • R(F);CHECK,XP(i)
      • Vars
        • K(e);S_FLIGHT::R1(F)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • DUALS(2)
    • Vars
      • R(d);CHECK,S_CUTB(c)::QAB(E)+R(F)
      • K(e);S_FLIGHT::QAB(E)+R(F),DCHECK
      • R(b);XS(B)::QAB(E)+R(F),DCHECK
      • R(b);XB(D)::QAB(E)+R(F),DCHECK,XP(i)
      • B(c);OGATE,P_SPINB(c),XR(F)::QAB(E),XB(c)
      • P(i);::QAB(E)+R(F),DCHECK
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