MESON Chess Problem Database

Problem Display
PID: 234436 (Kn3B1q/1p3N2/pQP1k1B1/r1bN2p1/2P5/5p2/5pr1/8 w - - 0 1)

Lincoln, Robert A

Die Schwalbe, 1992

Kn3B1q/1p3N2/pQP1k1B1/r1bN2p1/2P5/5p2/5pr1/8

#2

8 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Sd8#
    • 1...Qf6
      • 2.Sc7#
  • Tries
    • 1.Qxc5?
      • threat
        • 2.Qd6#
        • 2.Qe7#
      • 1...Qxf8
        • 2.Qe3#
      • 1...Sxc6
        • 2.Qd6#
      • 1...Qe5
        • 2.Sd8#
        • 2.Qe7#
      • 1...Qf6
        • 2.Sc7#
        • 2.Qd6#
      • 1...Qh2
        • 2.Qe7#
      • 1...Rxc5!
    • 1.Qc7?
      • threat
        • 2.Sd8#
      • 1...Qxf8
        • 2.Qe5#
      • 1...Sxc6
        • 2.Qc8#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Be7
        • 2.Qxe7#
      • 1...Qf6!
    • 1.Qd8?
      • threat
        • 2.Sc7#
      • 1...Qh2
        • 2.Qf6#
      • 1...Bb6
        • 2.Qe7#
        • 2.Qd6#
        • 2.Qe8#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Be7
        • 2.Qxe7#
      • 1...Qe5!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qf5#
      • 1...Qe5
        • 2.Sd8#
      • 1...Qf6
        • 2.Sc7#
      • 1...Qh3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(k);SBLOCK::S(F)
    • Q(k);SBLOCK::S(B)
  • Tries
    • Try
      • Q(C);XB(e)
      • Threat
        • DUALS(2)
      • Vars
        • Q(k);N_GUARD,XB(H)::QAR(C)
        • S(j);P_PINB(H),XP(D)::QAR1(C)
        • Q(k);::QAR1(C)
      • Refutation
        • R(d);XQ(C)
    • Try
      • Q(C);
      • Threat
        • S(F)
      • Vars
        • Q(k);N_GUARD,XB(H)::QAR1(C)
        • S(j);N_GUARD,P_PINB(H),XP(D)::QAB(C)
        • B(e);N_GUARD::QAR1(C),XB(e)
      • Refutation
        • Q(k);
    • Try
      • Q(C);
      • Threat
        • S(B)
      • Vars
        • Q(k);N_GUARD::QAR1(C)
        • B(e);N_GUARD::QAR1(C),XB(e)
      • Refutation
        • Q(k);
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • Q(k);SBLOCK::S(F)
      • Q(k);SBLOCK::S(B)
      • Q(k);N_GUARD::QAR2(C)
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