MESON Chess Problem Database

Problem Display
PID: 228021 (3N3K/7Q/3kNB2/n7/bP6/3p4/2qp4/8 w - - 0 1)

Otten, Henry

Deutsche Schachzeitung, 1892

3N3K/7Q/3kNB2/n7/bP6/3p4/2qp4/8

#2

6 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qxd3#
    • 1...Qc1
      • 2.Qxd3#
    • 1...Qc7
      • 2.Qxd3#
    • 1...Qc8
      • 2.Qxd3#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Qe7#
      • 1...Qc7
        • 2.Qxd3#
      • 1...Sc6
        • 2.Sb7#
      • 1...Bd7!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Qe7#
      • 1...Qxc7
        • 2.Qxd3#
      • 1...Bd7
        • 2.Qh2#
      • 1...Sc6
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::QAR(D),XP(c)
    • Q(a);N_GUARD,P_PINS(E)::QAR(D),XP(c)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(D)
      • Vars
        • Q(a);N_GUARD,SBLOCK::QAR(D),XP(c)
        • S(e);N_GUARD,SBLOCK::S(E)
      • Refutation
        • B(d);
  • Actual
    • S(B);
    • Threat
      • QAB1(D)
    • Vars
      • Q(a);N_GUARD,SBLOCK,XS(B)::QAR(D),XP(c)
      • B(d);SBLOCK::QAB(D)
      • S(e);N_GUARD,SBLOCK::S(E)
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