MESON Chess Problem Database

Problem Display
PID: 137990 (qb3NK1/2p5/p4RPQ/2pk4/1prP2BR/2r2P2/5P1B/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

The Problemist, 1985

qb3NK1/2p5/p4RPQ/2pk4/1prP2BR/2r2P2/5P1B/8

#2

11 + 9

6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf3
      • 2.Bxf3#
    • 1...cxd4
      • 2.Rh5#
      • 2.Qg5#
      • 2.Qh5#
    • 1...c6
      • 2.Be6#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Rh5#
        • 2.Qe4#
        • 2.Qe5#
      • 1...Rxd4
        • 2.Qe6#
      • 1...cxd4
        • 2.Rh5#
        • 2.Qg5#
        • 2.Qe5#
      • 1...c6
        • 2.Be6#
        • 2.Qe4#
      • 1...Rxe3!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qd7#
      • 1...Kxd4
        • 2.Rd6#
      • 1...Rxf3
        • 2.Bxf3#
      • 1...Rxd4
        • 2.Qf7#
      • 1...cxd4
        • 2.Rh5#
      • 1...Qc6
        • 2.Rf5#
      • 1...c6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,XP(C)::B(E),XR(a)
    • P(g);SBLOCK::B(E)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • R(c);SBLOCK,XP(D)::QAB1(I)
      • Refutation
        • R(a);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR2(I)
    • Vars
      • K(e);P-FLIGHT,XP(D)::QAB(I)+R(G),DCHECK
      • R(a);OGATE,XP(C)::B(E),XR(a)
      • R(c);SBLOCK,XP(D)::QAB(I)
      • P(d);SBLOCK,XP(D)::R(F)
      • Q(h);SBLOCK::R(G)
      • P(g);SBLOCK::B(E)
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