MESON Chess Problem Database

Problem Display
PID: 141956 (3rr2n/5nNB/N1P5/1Q1PPR1K/P3k3/4P3/b1RPp3/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

4th HM., Melnichenko-60 JT, 1999

3rr2n/5nNB/N1P5/1Q1PPR1K/P3k3/4P3/b1RPp3/8

#2

13 + 7

6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Bxd5
      • 2.Sc5#
    • 1...Sxe5
      • 2.Rf4#
  • Tries
    • 1.Rc4+?
      • 1...Bxc4
        • 2.Qxc4#
      • 1...Kd3!
    • 1.Qb4+?
      • 1...Kxd5
        • 2.Sc7#
        • 2.Rc5#
        • 2.Qd4#
        • 2.e4#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Kd3!
    • 1.d6?
      • threat
        • 2.Rf4#
      • 1...Bd5
        • 2.Sc5#
      • 1...Rxe5!
    • 1.e6?
      • threat
        • 2.Sc5#
      • 1...Se5
        • 2.Rf4#
      • 1...Rxd5!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qd4#
      • 1...Kd3
        • 2.Sc5#
      • 1...Kxd5
        • 2.Qd4#
      • 1...Rxd5
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::QAR2(E)
    • B(a);N_GUARD::QAR2(E),XB(a)
    • B(a);SBLOCK,XP(F)::S(J)
    • S(d);SBLOCK,XP(G)::B(M)+R(H),DCHECK
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • B(a);OGATE,XR(A)::QAR2(E),XB(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(E),XB(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(F);
      • Threat
        • B(M)+R(H),DCHECK
      • Vars
        • B(a);SBLOCK::S(J)
      • Refutation
        • R(f);P_PINR(H),XP(G)
    • Try
      • P(G);
      • Threat
        • S(J)
      • Vars
        • S(d);SBLOCK::B(M)+R(H),DCHECK
      • Refutation
        • R(e);P_PINR(H),XP(F)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • K(c);S_FLIGHT::S(J)
      • K(c);S_FLIGHT,XP(F)::QAR1(E)
      • R(e);SBLOCK,XP(F)::B(M)+R(H),DCHECK
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