MESON Chess Problem Database

Problem Display
PID: 18776 (Q4N2/2R2P2/3p1k2/8/3N2K1/r1B3p1/8/2r5 w - - 0 1)

Chepizhni, Viktor Ivanovich

1st Prize, Dnepropetrovsk Sports Club, 1958

Q4N2/2R2P2/3p1k2/8/3N2K1/r1B3p1/8/2r5

#2

7 + 5

3976 FIDE Album (1956-1958) 1961
3174 The Two-move Chess Problem Tradition and Development 1966
3310 2345 Chess Problems 1997
6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Sf3#
      • 2.Sd7#
    • 1...Kg7
      • 2.Sf5#
    • 1...Rca1
      • 2.Sb3#
    • 1...Rb1
      • 2.Sb3#
    • 1...Rf1
      • 2.Sb3#
    • 1...Rg1
      • 2.Sb3#
    • 1...Rh1
      • 2.Sb3#
    • 1...Raa1
      • 2.Sc2#
    • 1...Ra2
      • 2.Sc2#
    • 1...Ra6
      • 2.Sc2#
    • 1...Ra7
      • 2.Sc2#
    • 1...Rxa8
      • 2.Sc2#
  • Tries
    • 1.Qf3+?
      • 1...Ke5
        • 2.Sc6#
        • 2.Sg6#
        • 2.Sd7#
        • 2.Re7#
        • 2.Qf5#
      • 1...Kg7!
    • 1.Qd5?
      • threat
        • 2.Qg5#
      • 1...Ra5
        • 2.Sc2#
      • 1...Kg7!
    • 1.Qd8+?
      • 1...Kg7
        • 2.Sf5#
      • 1...Ke5!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qh8#
      • 1...Ke5
        • 2.Sc6#
        • 2.Sd7#
      • 1...Kg7
        • 2.Sde6#
      • 1...Rxh1
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 9
  • Sets
    • K(e);S_FLIGHT::B(A)+S(B),DCHECK
    • R(a);N_GUARD::B(A)+S(B)
    • R(b);N_GUARD::B(A)+S(B)
    • R(b);N_GUARD,XQ(F)::B(A)+S(B)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • R(b);N_GUARD::B(A)+S(B)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);S_FLIGHT::B(A)+S(B),DCHECK
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • K(e);S_FLIGHT::B(A)+S(B),DCHECK
      • R(a);N_GUARD,XQ(F)::B(A)+S(B)
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