MESON Chess Problem Database

Problem Display
PID: 24619 (1nr5/2pR1NN1/2k5/4B1K1/1Qp1R3/2r3p1/b7/b6B w - - 0 1)

Chepizhni, Viktor Ivanovich

Rudenko, Valentin Fedorovich

1st Prize, Loshinski MT (64), 1981-1982

1nr5/2pR1NN1/2k5/4B1K1/1Qp1R3/2r3p1/b7/b6B

#2

8 + 9

3752 FIDE Album (1980-1982) 1988
6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd7
      • 2.Rd4#
    • 1...Sxd7
      • 2.Rxc4#
  • Tries
    • 1.Sd8+?
      • 1...Kxd7
        • 2.Rd4#
      • 1...Rxd8!
    • 1.Bd4?
      • threat
        • 2.Se5#
      • 1...Kxd7
        • 2.Re7#
      • 1...Sxd7
        • 2.Re6#
      • 1...Re8!
    • 1.Red4+?
      • 1...Rf3
        • 2.Bxf3#
      • 1...g2!
    • 1.Rxc7+?
      • 1...Kd5
        • 2.Rd4#
        • 2.Qa5#
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qb5#
      • 1...Rxc7!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Qb5#
      • 1...Kxd5
        • 2.Rd4#
      • 1...Rb3
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(f);S_FLIGHT,XR(F)::R(C)
    • S(h);SBLOCK,XR(F)::B(A)+R(C),DCHECK,XP(e)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(f);S_FLIGHT,XR(F)::R(C)
      • Refutation
        • R(i);XS(G)
    • Try
      • B(D);
      • Threat
        • S(G)
      • Vars
        • K(f);S_FLIGHT,XR(F)::R1(C)
        • S(h);SBLOCK,XR(F)::B(A)+R(C),DCHECK
      • Refutation
        • R(i);
    • Try
      • R(C);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::B(A),XR(c)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • R(F);CHECK,XP(g)
      • Refutation
        • R(i);XR(F)
  • Actual
    • R(F);
    • Threat
      • QAB1(B)
    • Vars
      • K(f);OGATEB,S_FLIGHT,XR(F)::B(A)+R(C),DCHECK
      • R(c);N_GUARD,S_CUTB(b)::R(C),XP(e)
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