MESON Chess Problem Database

Problem Display
PID: 51801 (8/2Q5/r2P2nN/1n1pB3/p3k1b1/2Pp1NpR/3RPP1b/2K5 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Rudenko, Valentin Fedorovich

1st Prize, Moscow Congress, 2003

8/2Q5/r2P2nN/1n1pB3/p3k1b1/2Pp1NpR/3RPP1b/2K5

#2

11 + 10

145 StrateGems 2004
56 The Problemist 2005
15174 FIDE Album (2001-2003) 2011
56 The Problemist 2011

SOLUTION

  • SOUND
  • Sets
    • 1...g2
      • 2.exd3#
  • Tries
    • 1.Qf7?
      • threat
        • 2.exd3#
      • 1...Bxf3
        • 2.Qf5#
      • 1...Sxe5
        • 2.Sg5#
      • 1...dxe2
        • 2.Qxd5#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Sf4
        • 2.Qxf4#
      • 1...gxf2!
    • 1.Qg7?
      • threat
        • 2.Sg5#
      • 1...Bxf3
        • 2.exd3#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...d4!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qe3#
      • 1...gxf2
        • 2.exd3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...d4
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(c);::P(C),XP(b)
  • Tries
    • Try
      • Q(K);
      • Threat
        • P(C),XP(b)
      • Vars
        • B(f);N_GUARD,XS(F)::QAB1(K)
        • S(j);SBLOCK,XB(H)::S(F)
        • P(b);XP(C)::QAB1(K),XP(h)
        • B(f);N_GUARD::QAB1(K),XB(f)
        • S(j);N_GUARD::QAR1(K),XS(j)
      • Refutation
        • P(c);XP(D)
    • Try
      • Q(K);
      • Threat
        • S(F)
      • Vars
        • B(f);SBLOCK,XS(F)::P(C),XP(b)
        • S(j);OGATE,XB(H)::QAR1(K),XS(j)
      • Refutation
        • P(h);
  • Actual
    • Q(K);
    • Threat
      • QAR1(K)
    • Vars
      • P(c);XP(D)::P(C),XP(b)
      • S(g);N_GUARD::QAR1(K),XS(g)
      • P(h);::S(F)
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