MESON Chess Problem Database

Problem Display
PID: 19121 (4r3/n1p2B2/Kpk3N1/6Q1/3Rqr2/B2p4/8/7b w - - 0 1)

Palkoska, Emil

Schach-Welt, 1912

4r3/n1p2B2/Kpk3N1/6Q1/3Rqr2/B2p4/8/7b

#2

6 + 9

3360 Simple Two-move Themes 1924
887 Mate in Two Moves 1931

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Bxe8#
    • 1...Qf3
      • 2.Bxe8#
    • 1...Rf3
      • 2.Qc1#
    • 1...Rg4
      • 2.Qc1#
    • 1...Rh4
      • 2.Qc1#
    • 1...Rf6
      • 2.Qc1#
    • 1...Rxf7
      • 2.Qc1#
    • 1...Sb5
      • 2.Qxb5#
    • 1...Sc8
      • 2.Qb5#
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Qf6+?
      • 1...Qe6
        • 2.Se5#
        • 2.Bxe8#
      • 1...Re6
        • 2.Se7#
        • 2.Be8#
      • 1...Rxf6!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Se5#
        • 2.Se7#
      • 1...Qxg6
        • 2.Bxe8#
      • 1...Qxd4
        • 2.Se5#
      • 1...Qd5
        • 2.Se5#
      • 1...Qe5
        • 2.Sxe5#
        • 2.Se7#
      • 1...Qe6
        • 2.Se5#
      • 1...Qe7
        • 2.Se5#
        • 2.Sxe7#
      • 1...Rf6
        • 2.Qc1#
      • 1...Re5
        • 2.Sxe5#
        • 2.Se7#
      • 1...Re6
        • 2.Se7#
      • 1...Re7
        • 2.Se5#
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • Q(c);N_GUARD::B(F),XR(i)
    • R(d);OGATE::QAR(C)
    • R(d);OGATE,XB(F)::QAR(C)
    • S(g);N_GUARD::QAB1(C),XS(g)
    • S(g);N_GUARD::QAB1(C)
    • P(e);N_GUARD::QAR1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • R(d);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • Q(c);N_GUARD,P_SPINQ(c),XS(E)::B(F),XR(i)
      • Q(c);XR(B)::QAR(C)+S(E),DCHECK
      • Q(c);::QAR(C)+S(E),DCHECK
      • Q(c);::S(E)
      • R(d);OGATE::QAR(C)
      • R(i);::S(E)
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