MESON Chess Problem Database

Problem Display
PID: 125368 (4Q2B/3p1P2/n1P2nq1/K1pkPPp1/BP1N4/1P2RP2/2RPN3/7b w - - 0 1)

Degener, Udo

Degenkolbe, Mirko

2nd Prize, Wola Gulowska, 1988

4Q2B/3p1P2/n1P2nq1/K1pkPPp1/BP1N4/1P2RP2/2RPN3/7b

#2

16 + 8

15345 Wola Gulowska Award 1988
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf7
      • 2.Qxf7#
    • 1...Sc7
      • 2.Rxc5#
    • 1...Sb8
      • 2.Rxc5#
    • 1...c4
      • 2.bxc4#
    • 1...dxc6
      • 2.Bxc6#
      • 2.Qxc6#
      • 2.Qe6#
    • 1...d6
      • 2.Qe6#
  • Tries
    • 1.Sf4+?
      • 1...Kxd4
        • 2.Rc4#
        • 2.Rd3#
      • 1...gxf4!
    • 1.Sb5?
      • threat
        • 2.Sbc3#
      • 1...Kxc6
        • 2.Qa8#
      • 1...cxb4
        • 2.Rd3#
      • 1...Se4!
    • 1.Se6?
      • threat
        • 2.Sc3#
      • 1...dxe6
        • 2.Qxe6#
      • 1...Se4
        • 2.Rd3#
      • 1...cxb4!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Sc3#
      • 1...cxb4
        • 2.Sb5#
      • 1...Se4
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(g);OGATE,XP(N)::QAB(O),XQ(g)
    • S(e);N_GUARD::R1(A),XP(b)
    • P(b);OGATE::P(D),XP(b)
    • P(h);N_GUARD::QAB1(O)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • P(d);XS(C)
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • K(c);OGATEB,P_SPINP(b),S_FLIGHT,XP(M)::QAB(O)
        • P(b);XP(H)::R(E)
      • Refutation
        • S(f);
    • Try
      • S(I);
      • Threat
        • S(C)
      • Vars
        • P(h);OGATE,XS(I)::QAB1(O),XP(h)
        • S(f);::R(E)
      • Refutation
        • P(b);XP(H)
  • Actual
    • R(E);
    • Threat
      • S(C)
    • Vars
      • P(b);XP(H)::R(E)+S(I)
      • S(f);::R(E)+S(I)
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