MESON Chess Problem Database

Problem Display
PID: 134047 (6RB/2N5/p3N3/r1p1pkP1/5p1P/n5bK/4P1Q1/8 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Rudenko, Valentin Fedorovich

4th Prize, The Problemist, 2009

6RB/2N5/p3N3/r1p1pkP1/5p1P/n5bK/4P1Q1/8

#2

9 + 8

56 The Problemist 2010
23 Die Schwalbe 2013

SOLUTION

  • SOUND
  • Tries
    • 1.Sd4+?
      • 1...exd4
        • 2.Qd5#
      • 1...cxd4!
    • 1.Qf3?
      • threat
        • 2.e4#
      • 1...e4
        • 2.Qg4#
      • 1...Ra4!
    • 1.Qd5?
      • threat
        • 2.Qxe5#
      • 1...f3
        • 2.e4#
      • 1...c4
        • 2.Sd4#
      • 1...Sc4!
    • 1.Qc6?
      • threat
        • 2.Sg7#
      • 1...f3
        • 2.e4#
      • 1...e4
        • 2.Qd5#
      • 1...Bxh4!
  • Keys
    • 1.Sxf4!
      • threat
        • 2.Rf8#
      • 1...Kxf4
        • 2.Qf3#
      • 1...Bxf4
        • 2.e4#
      • 1...exf4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • P(f);S_CUTP(e),XS(F)::QAR2(B)
      • Refutation
        • P(e);XS(F)
    • Try
      • Q(B);P_PINP(c)
      • Threat
        • P(A)
      • Vars
        • P(f);SBLOCK::QAB1(B)
      • Refutation
        • R(d);
    • Try
      • Q(B);P_PINP(f)
      • Threat
        • QAR1(B),XP(f)
      • Vars
        • P(c);N_GUARD::P(A)
        • P(e);N_GUARD::S(F)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Threat
        • S(F)
      • Vars
        • P(c);N_GUARD::P(A)
        • P(f);OGATEB::QAR2(B)
      • Refutation
        • B(b);XP(D)
  • Actual
    • S(F);XP(c)
    • Threat
      • R(H)
    • Vars
      • K(g);OGATEB,P-FLIGHT,XS(F)::QAR1(B)
      • B(b);SBLOCK,XS(F)::P(A)
      • P(f);OGATEB,SBLOCK,XS(F)::QAR2(B)
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