MESON Chess Problem Database

Problem Display
PID: 122962 (k7/1p6/6n1/1N6/K2p1B2/3Q4/8/5b2 w - - 0 1)

Ferber, Eugene

Deutsches Wochenschach, 1908

k7/1p6/6n1/1N6/K2p1B2/3Q4/8/5b2

#2

4 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...b6
      • 2.Qe4#
      • 2.Qf3#
  • Tries
    • 1.Qxd4?
      • threat
        • 2.Qa7#
        • 2.Qd8#
      • 1...b6
        • 2.Qe4#
        • 2.Qd5#
      • 1...Bh3
        • 2.Qa7#
      • 1...Se7
        • 2.Qa7#
      • 1...Bxb5+!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Kb3#
        • 2.Kb4#
      • 1...Bxb5+
        • 2.Kxb5#
      • 1...Sxf4
        • 2.Qf8#
      • 1...Se5
        • 2.Qf8#
      • 1...b6
        • 2.Qf3#
      • 1...Bc4
        • 2.Kb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR1(A)
        • S(c);::QAR1(A)
      • Refutation
        • B(a);CHECK,XS(D)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • B(a);CHECK,XS(D)::QAR(A)+K(B),XB(a)
      • S(c);N_GUARD,XB(C)::QAR(A)
      • S(c);N_GUARD::QAR(A)
      • P(d);OGATEB::QAB(A)
      • B(a);::QAR(A)+K(B)
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