MESON Chess Problem Database

Problem Display
PID: 139118 (4R1Q1/5KN1/1n6/2P3R1/n2kPp2/3p4/B2P4/2r1r2b w - - 0 1)

Chepizhni, Viktor Ivanovich

Rudenko, Valentin Fedorovich

3rd Prize, Schach-Echo, 1972

4R1Q1/5KN1/1n6/2P3R1/n2kPp2/3p4/B2P4/2r1r2b

#2

9 + 8

6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe4
      • 2.Se6#
    • 1...Sxc5
      • 2.Sf5#
    • 1...Sc4
      • 2.Rd5#
    • 1...Sd5
      • 2.Rxd5#
    • 1...Sd7
      • 2.Rd5#
    • 1...Sa8
      • 2.Rd5#
    • 1...Sc8
      • 2.Rd5#
  • Tries
    • 1.Rge5?
      • threat
        • 2.Sf5#
      • 1...Sd5
        • 2.Rxd5#
      • 1...Bxe4!
    • 1.Qh7?
      • threat
        • 2.Se6#
      • 1...Sxc5
        • 2.Sf5#
      • 1...Rxe4!
    • 1.Qf8?
      • threat
        • 2.Sf5#
      • 1...Bxe4
        • 2.Se6#
      • 1...Rxc5!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Sh5#
      • 1...Rxc5
        • 2.Sf5#
      • 1...Rxe4
        • 2.Se6#
      • 1...Sd5
        • 2.Rxd5#
      • 1...Sc4
        • 2.Rd5#
      • 1...Sd7
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(c);SBLOCK,XP(C)::S(G)
    • S(e);SBLOCK,XP(D)::S(G)
    • S(h);N_GUARD::R1(E)
    • S(h);N_GUARD::R1(E),XS(h)
  • Tries
    • Try
      • R(E);
      • Threat
        • S(G)
      • Vars
        • S(h);N_GUARD::R1(E),XS(h)
      • Refutation
        • B(c);XP(C)
    • Try
      • Q(I);
      • Threat
        • S(G)
      • Vars
        • S(e);SBLOCK,XP(D)::S(G)
      • Refutation
        • R(b);XP(C)
    • Try
      • Q(I);
      • Threat
        • S(G)
      • Vars
        • B(c);SBLOCK,XP(C)::S(G)
      • Refutation
        • R(a);XP(D)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+S(G)
    • Vars
      • R(a);SBLOCK,XP(D)::QAB(I)+S(G),DCHECK
      • R(b);SBLOCK,XP(C)::QAB(I)+S(G),DCHECK
      • S(h);N_GUARD::R1(E),XS(h)
      • S(h);N_GUARD::R1(E)
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