MESON Chess Problem Database

Problem Display
PID: 15696 (8/Q7/5B2/3b1R1B/2n1kP2/1n1NP3/K1P4R/2b5 w - - 0 1)

Lacny, Ludovit

Die Schwalbe, 1987

8/Q7/5B2/3b1R1B/2n1kP2/1n1NP3/K1P4R/2b5

#2

10 + 5

721 Variantim 1990

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Re5#
    • 1...Sd2
      • 2.Re5#
    • 1...Sa3
      • 2.Re5#
    • 1...Sxe3
      • 2.Re5#
    • 1...Sa5
      • 2.Re5#
    • 1...Se5
      • 2.Rxe5#
    • 1...Sb6
      • 2.Re5#
    • 1...Sd6
      • 2.Re5#
  • Tries
    • 1.Rg5?
      • threat
        • 2.Sf2#
      • 1...Bxe3
        • 2.Qh7#
      • 1...Sxe3
        • 2.Re5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sb6
        • 2.Re5#
      • 1...Sc5!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Re5#
      • 1...Kxe3
        • 2.Re2#
      • 1...Bxe3
        • 2.Rg5#
      • 1...Sxe3
        • 2.Sf2#
      • 1...Se5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • S(c);N_GUARD::R1(G)
    • S(c);N_GUARD,XP(E)::R1(G)
    • S(c);N_GUARD::R1(G),XS(c)
  • Tries
    • Try
      • R(G);
      • Threat
        • S(D)
      • Vars
        • B(a);SBLOCK,XP(E)::QAB(J)
        • S(c);N_GUARD,XP(E)::R1(G)
        • S(b);N_GUARD::QAR1(J),XS(b)
        • S(c);N_GUARD::R1(G)
      • Refutation
        • S(b);
  • Actual
    • Q(J);
    • Threat
      • QAB(J)+R(G),DCHECK
    • Vars
      • K(d);OGATEB,P-FLIGHT,XP(E)::R1(C)
      • B(a);SBLOCK,XP(E)::QAB(J)+R(G)
      • S(c);SBLOCK,XP(E)::S(D)
      • S(c);::QAB(J)+R(G),DCHECK,XS(c)
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