MESON Chess Problem Database

Problem Display
PID: 87553 (3N2b1/2K1pp1n/1R6/p3Pk2/p3n3/7N/8/BB4R1 w - - 0 1)

Iwanow, Eugeniusz

Comm., Polish Championship, 1996

3N2b1/2K1pp1n/1R6/p3Pk2/p3n3/7N/8/BB4R1

#2

8 + 8

16307 Rozmaitosci Szachowe 1996
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Rxg5#
    • 1...Sf6
      • 2.Rg5#
    • 1...Sf8
      • 2.Rg5#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Sxe7#
      • 1...e6
        • 2.Se7#
      • 1...Ke6!
    • 1.Rb3?
      • threat
        • 2.Rf3#
      • 1...Sg5
        • 2.Rxg5#
      • 1...axb3!
    • 1.Rb4?
      • threat
        • 2.Bxe4#
      • 1...Sg5
        • 2.Rxg5#
      • 1...Sf6
        • 2.Rg5#
      • 1...axb4!
    • 1.Rb5?
      • threat
        • 2.e6#
      • 1...Sg5
        • 2.Rxg5#
      • 1...Sf6
        • 2.Rg5#
      • 1...e6!
    • 1.Rf6+?
      • 1...Sxf6
        • 2.Rg5#
      • 1...exf6!
    • 1.e6?
      • threat
        • 2.Rb5#
      • 1...Sg5
        • 2.Rxg5#
      • 1...Sf6
        • 2.Rg5#
      • 1...fxe6!
  • Keys
    • 1.Rb2!
      • threat
        • 2.Rf2#
      • 1...Kxe5
        • 2.Rb5#
      • 1...Sg5
        • 2.Rxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(g);N_GUARD::R1(C),XS(g)
    • S(g);N_GUARD::R1(C)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H),XP(e)
      • Vars
        • P(e);::S(H)
      • Refutation
        • K(d);N_SPINS(b),S_FLIGHT
    • Try
      • R(F);
      • Threat
        • R(F)
      • Vars
        • S(g);N_GUARD::R1(C),XS(g)
      • Refutation
        • P(a);XR(F)
    • Try
      • R(F);
      • Threat
        • B(B),XS(b)
      • Vars
        • S(g);N_GUARD::R1(C),XS(g)
        • S(g);N_GUARD::R1(C)
      • Refutation
        • P(c);XR(F)
    • Try
      • R(F);
      • Threat
        • R(F)+P(E)
      • Vars
        • S(g);N_GUARD::R1(C),XS(g)
        • S(g);N_GUARD::R1(C)
      • Refutation
        • P(e);
    • Try
      • R(F);CHECK
      • Vars
        • S(g);XR(F)::R1(C)
      • Refutation
        • P(e);XR(F)
    • Try
      • P(E);
      • Threat
        • R(F)
      • Vars
        • S(g);N_GUARD::R1(C),XS(g)
        • S(g);N_GUARD::R1(C)
      • Refutation
        • P(f);XP(E)
  • Actual
    • R(F);
    • Threat
      • R(F)
    • Vars
      • K(d);N_SPINS(b),OGATEB,P-FLIGHT,XP(E)::B(A)+R(F),DCHECK
      • S(g);N_GUARD::R1(C),XS(g)
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