MESON Chess Problem Database

Problem Display
PID: 7463 (2K2n2/1P1P4/Q5pp/3pN3/2pBk1P1/4P3/1r6/4N1n1 w - - 0 1)

Rychkov, Vladimir Nikolaevich

HM., Melnichenko-60 JT, 1990

2K2n2/1P1P4/Q5pp/3pN3/2pBk1P1/4P3/1r6/4N1n1

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd7
      • 2.Qxg6#
    • 1...Sh7
      • 2.Qxg6#
    • 1...c3
      • 2.Qd3#
  • Tries
    • 1.S1d3?
      • threat
        • 2.Sc5#
      • 1...Sxd7
        • 2.Qxg6#
      • 1...cxd3
        • 2.Qxd3#
      • 1...Rb5
        • 2.Sf2#
      • 1...Se6!
    • 1.Sxc4?
      • threat
        • 2.Sd6#
      • 1...dxc4
        • 2.Qc6#
      • 1...Rb6
        • 2.Sd2#
      • 1...Rc2!
    • 1.Qf6?
      • threat
        • 2.Qf4#
      • 1...Se2
        • 2.Qf3#
      • 1...Sh3
        • 2.Qf3#
      • 1...Se6
        • 2.Qxg6#
      • 1...g5
        • 2.Qf5#
      • 1...Rf2!
  • Keys
    • 1.S5d3!
      • threat
        • 2.Sc5#
      • 1...Sxd7
        • 2.Qxg6#
      • 1...cxd3
        • 2.Qxd3#
      • 1...Rb5
        • 2.Sf2#
      • 1...Se6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(h);N_GUARD,XP(H)::QAB(F),XP(f)
    • S(h);N_GUARD::QAB(F),XP(f)
    • P(c);OGATE::QAB1(F)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • S(h);N_GUARD,XP(H)::QAB(F),XP(f)
        • P(c);OGATE,XS(A)::QAB1(F),XP(c)
        • R(b);N_GUARD::S(A)
      • Refutation
        • S(h);
    • Try
      • S(E);XP(c)
      • Threat
        • S(E)
      • Vars
        • P(e);OGATEB,XS(E)::QAB(F)
        • R(b);N_GUARD::S(E)
      • Refutation
        • R(b);P_PINS(E)
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • S(a);N_GUARD::QAB1(F)
        • S(h);N_GUARD::QAB(F),XP(f)
        • P(f);N_GUARD::QAB1(F)
      • Refutation
        • R(b);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • S(h);N_GUARD,XP(H)::QAB(F),XP(f)
      • P(c);OGATE,XS(E)::QAB1(F),XP(c)
      • R(b);N_GUARD::S(E)
      • S(h);N_GUARD::QAR2(F),XS(h)
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