MESON Chess Problem Database

Problem Display
PID: 4571 (4K3/8/N2p2N1/3k1P2/8/3nP3/4B3/5Q2 w - - 0 1)

Dobrusky, Jan

Deutsche Schachzeitung, 1880

4K3/8/N2p2N1/3k1P2/8/3nP3/4B3/5Q2

#2

7 + 3

2794 Terms & Themes of Chess Problems 1907
15 British Chess Magazine 1911
45 Schach 1951

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qf3#
    • 1...Sc1
      • 2.Bf3#
      • 2.Qg2#
      • 2.Qh1#
      • 2.Qf3#
    • 1...Sb2
      • 2.Bf3#
      • 2.Qg2#
      • 2.Qh1#
      • 2.Qf3#
    • 1...Sb4
      • 2.Bf3#
      • 2.Qg2#
      • 2.Qh1#
      • 2.Qf3#
    • 1...Sf4
      • 2.Bf3#
      • 2.Qf3#
  • Tries
    • 1.Qd1?
      • 1...Kc4
        • 2.Qxd3#
      • 1...Ke4
        • 2.Qxd3#
      • 1...Kc6!
  • Keys
    • 1.Qb1!
      • 1...Kc4
        • 2.Qxd3#
      • 1...Ke4
        • 2.Qxd3#
      • 1...Kc6
        • 2.Se7#
      • 1...Sc1
        • 2.Qb7#
      • 1...Se1
        • 2.Qb7#
      • 1...Sb2
        • 2.Qh1#
      • 1...Sf2
        • 2.Qb7#
      • 1...Sb4
        • 2.Qh1#
      • 1...Sf4
        • 2.Qb7#
      • 1...Sc5
        • 2.Sb4#
      • 1...Se5
        • 2.Se7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • Q(A);P_PINS(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(A),XS(a)
        • K(b);N_SPINS(a),S_FLIGHT::QAB1(A),XS(a)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT::QAB1(A),XS(a)
      • K(b);S_FLIGHT::S(F)
      • S(a);::QAB(A)
      • S(a);N_GUARD,SBLOCK::S(E)
      • S(a);SBLOCK::S(F)
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