MESON Chess Problem Database

Problem Display
PID: 59012 (2NnR3/1n1N2p1/R1P1P1Q1/3k3r/4p2r/2K4p/8/7B w - - 0 1)

Degener, Udo

Degenkolbe, Mirko

Troll, 1999

2NnR3/1n1N2p1/R1P1P1Q1/3k3r/4p2r/2K4p/8/7B

#2

9 + 8

14503 Problemschach-Jahrbuch (1999) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rg5
      • 2.Qxg5#
    • 1...Rh6
      • 2.Qf5#
      • 2.Qg5#
    • 1...Rh7
      • 2.Qf5#
      • 2.Qg5#
    • 1...Rh8
      • 2.Qf5#
      • 2.Qg5#
    • 1...Sd6
      • 2.Se7#
    • 1...Sxe6
      • 2.Qxe6#
  • Tries
    • 1.Qxh5+?
      • 1...g5
        • 2.Qd1#
        • 2.Qxg5#
      • 1...Rxh5!
    • 1.cxb7?
      • threat
        • 2.Se7#
        • 2.Rd6#
      • 1...Sxb7
        • 2.Se7#
      • 1...Sf7
        • 2.Se7#
      • 1...Sc6!
    • 1.e7?
      • threat
        • 2.Scb6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Se6!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qd3#
      • 1...Sxc6
        • 2.Scb6#
      • 1...Sxe6
        • 2.Se7#
      • 1...Sc5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(e);N_GUARD::QAR2(F),XR(e)
    • R(e);N_GUARD::QAR(F),XR(e)
    • S(f);SBLOCK::S(H)
    • S(h);OGATE,XP(E)::QAB1(F),XS(h)
  • Tries
    • Try
      • Q(F);CHECK,XR(e)
      • Refutation
        • R(c);XQ(F)
    • Try
      • P(D);XS(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);XP(D)::S(H)
        • S(h);::S(H)
      • Refutation
        • S(h);
    • Try
      • P(E);
      • Threat
        • S(H)
      • Vars
        • S(f);N_GUARD::QAR1(F),XS(f)
      • Refutation
        • S(h);
  • Actual
    • Q(F);
    • Threat
      • QAR2(F)
    • Vars
      • S(h);SBLOCK,XP(D)::S(H)
      • S(h);SBLOCK,XP(E)::S(H)
      • S(f);N_GUARD::QAR1(F)
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