MESON Chess Problem Database

Problem Display
PID: 247559 (5n2/5p2/8/1PPk3r/R2N3r/1P2Q3/4N3/2R1K2b w - - 0 1)

Belchikov, Nikolai Ivanovich

Uralski Problemist, 1999

5n2/5p2/8/1PPk3r/R2N3r/1P2Q3/4N3/2R1K2b

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Sf4#
    • 1...Rh3
      • 2.Sf4#
    • 1...Rxd4
      • 2.Rxd4#
    • 1...Rf4
      • 2.Sxf4#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Sc3#
      • 1...Re5
        • 2.Qb7#
      • 1...Rh3
        • 2.Sf4#
      • 1...Re4
        • 2.Qd6#
      • 1...Se6!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Sc3#
      • 1...Re4
        • 2.Qxe4#
      • 1...Re5
        • 2.Qxe5#
      • 1...Rc4
        • 2.bxc4#
      • 1...Rd4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD::S(C)
    • R(b);OGATE,XS(G)::R1(F),XR(b)
    • R(b);N_GUARD::S(C),XR(b)
  • Tries
    • Try
      • Q(E);
      • Threat
        • S(C)
      • Vars
        • R(d);P_PINS(C),SBLOCK::QAB(E)
        • R(b);N_GUARD::S(C)
        • R(b);P_PINS(C),SBLOCK::QAR1(E)
      • Refutation
        • S(f);
  • Actual
    • S(G);
    • Threat
      • S(C)
    • Vars
      • R(b);N_GUARD::QAB1(E),XR(b)
      • R(d);N_GUARD::QAR1(E),XR(d)
      • R(b);OGATE::P(D),XR(b)
      • R(b);N_GUARD::R1(F),XR(b)
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