MESON Chess Problem Database

Problem Display
PID: 242865 (8/3p1q2/K2B2n1/1R1PP3/3k2N1/1Pp2PNb/2p1PP2/4n3 w - - 0 1)

Degener, Udo

Schach, 1980

8/3p1q2/K2B2n1/1R1PP3/3k2N1/1Pp2PNb/2p1PP2/4n3

#2

11 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Sf5#
    • 1...Qe8
      • 2.Sf5#
    • 1...Qg8
      • 2.Sf5#
    • 1...Qf5
      • 2.Sxf5#
    • 1...Qe7
      • 2.Sf5#
    • 1...Qg7
      • 2.Sf5#
    • 1...Qh7
      • 2.Sf5#
    • 1...Sd3
      • 2.e3#
    • 1...Sxe5
      • 2.Bxe5#
  • Tries
    • 1.Sf6?
      • threat
        • 2.Rb4#
      • 1...Qxd5
        • 2.Rxd5#
      • 1...Sxe5
        • 2.Bc5#
      • 1...Sd3
        • 2.e3#
      • 1...Qxf6!
  • Keys
    • 1.Se3!
      • threat
        • 2.Rb4#
      • 1...Qxd5
        • 2.Rxd5#
      • 1...Sxe5
        • 2.Bc5#
      • 1...Sd3
        • 2.Sxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • Q(h);N_GUARD,XP(H)::S(E)
    • Q(h);N_GUARD::S(E)
    • Q(h);N_GUARD::S(E),XQ(h)
    • S(a);SBLOCK::P(A)
    • S(f);OGATE,XP(I)::B(K),XS(f)
  • Tries
    • Try
      • S(F);
      • Threat
        • R(G)
      • Vars
        • Q(h);OGATE,XP(H)::R1(G),XQ(h)
        • S(f);SBLOCK,XP(I)::B(K)
        • S(a);SBLOCK::P(A)
      • Refutation
        • Q(h);P_PINB(K),XS(F)
  • Actual
    • S(F);
    • Threat
      • R(G)
    • Vars
      • Q(h);OGATE,XP(H)::R1(G),XQ(h)
      • S(f);SBLOCK,XP(I)::B(K)
      • S(a);N_GUARD::S(F),XP(b)
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