MESON Chess Problem Database

Problem Display
PID: 68308 (6n1/1n4p1/4p3/1Q2P2R/r1r1k1PN/2P1N1P1/qp3PK1/1b1R4 w - - 0 1)

Degener, Udo

2nd HM., The Problemist, 2006

6n1/1n4p1/4p3/1Q2P2R/r1r1k1PN/2P1N1P1/qp3PK1/1b1R4

#2

11 + 10

56 The Problemist 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Qc6#
  • Tries
    • 1.Sd5?
      • threat
        • 2.f3#
      • 1...Rxc3
        • 2.Sxc3#
      • 1...exd5
        • 2.Qxd5#
      • 1...g5!
    • 1.Sef5?
      • threat
        • 2.f3#
      • 1...exf5
        • 2.Qd5#
      • 1...Rc5
        • 2.Qe2#
      • 1...Sc5
        • 2.Sd6#
      • 1...Rxc3!
    • 1.Shf5?
      • threat
        • 2.f3#
      • 1...exf5
        • 2.Qd5#
      • 1...Sc5
        • 2.Sd6#
      • 1...Rc5!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Sg5#
      • 1...Rc5
        • 2.Sd2#
      • 1...Sc5
        • 2.Qc6#
      • 1...g5
        • 2.Sxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(h);S_CUTR(e)::QAB(I)
  • Tries
    • Try
      • S(E);
      • Threat
        • P(B)
      • Vars
        • R(e);XP(D)::S(E),XR(e)
        • P(g);OGATE,XS(E)::QAB1(I),XP(g)
      • Refutation
        • P(i);
    • Try
      • S(E);
      • Threat
        • P(B)
      • Vars
        • P(g);N_GUARD,XS(E)::QAB1(I)
        • R(e);OGATE::QAR2(I)
        • S(h);N_GUARD::S(E)
      • Refutation
        • R(e);XP(D)
    • Try
      • S(H);
      • Threat
        • P(B)
      • Vars
        • P(g);N_GUARD,XS(H)::QAB1(I)
        • S(h);N_GUARD::S(H)
      • Refutation
        • R(e);
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • R(e);::S(H)
      • S(h);S_CUTR(e)::QAB(I)
      • P(i);::S(H),XP(i)
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