MESON Chess Problem Database

Problem Display
PID: 242872 (bK2Q3/8/8/8/1B1k1N2/4N3/r2P4/2bRn3 w - - 0 1)

Degener, Udo

Mat, 1988

bK2Q3/8/8/8/1B1k1N2/4N3/r2P4/2bRn3

#2

7 + 5

15148 Sadier Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qh8#
    • 1...Sd3
      • 2.Se2#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Sf5#
      • 1...Be4
        • 2.Qf6#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Ra5!
  • Keys
    • 1.d3!
      • threat
        • 2.Sf5#
      • 1...Bxe3
        • 2.Qh8#
      • 1...Sxd3
        • 2.Rxd3#
      • 1...Be4
        • 2.Qxe4#
      • 1...Ra5
        • 2.Se2#

Anticipated by 232414(1979)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(e);SBLOCK::QAB(G)
    • S(b);SBLOCK::S(E)
  • Tries
    • Try
      • Q(G);
      • Threat
        • S(C)
      • Vars
        • B(e);SBLOCK::QAB(G)
        • B(e);N_GUARD::QAR1(G),XB(e)
      • Refutation
        • R(c);
  • Actual
    • P(B);
    • Threat
      • S(C)
    • Vars
      • B(a);SBLOCK,XS(C)::QAB(G)
      • S(b);OGATE,P_SPINS(b),XP(B)::R1(A),XS(b)
      • B(e);N_GUARD::QAR1(G),XB(e)
      • R(c);N_GUARD::S(E)
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