MESON Chess Problem Database

Problem Display
PID: 7431 (3R4/3N3B/n5Nb/4Q2R/2P2r2/3k1p2/P5pq/1KB5 w - - 0 1)

Shanshin, Valery Yurevich

4th Prize, The Problemist, 1999/I

3R4/3N3B/n5Nb/4Q2R/2P2r2/3k1p2/P5pq/1KB5

#2

10 + 7

6022 Ukraine Album 1999 2000
56 The Problemist 2003
23 Die Schwalbe 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4
      • 2.Sf4#
      • 2.Sc5#
    • 1...Rf5
      • 2.Sb6#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Sge5#
      • 1...Kxc4
        • 2.Sb6#
      • 1...Ke4
        • 2.Sxf4#
      • 1...Re4
        • 2.Sde5#
      • 1...Rf5!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Sde5#
      • 1...Kxc4
        • 2.Sb6#
      • 1...Kd4
        • 2.Sb6#
      • 1...Rd4
        • 2.Sge5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(e);N_GUARD::R(J)+S(H)
  • Tries
    • Try
      • Q(E);
      • Threat
        • B(I)+S(G),DCHECK
      • Vars
        • K(c);S_FLIGHT,XP(D)::S(H)
        • K(c);S_FLIGHT::B(I)+S(G),XR(e)
        • R(e);SBLOCK::R(J)+S(H),DCHECK
      • Refutation
        • R(e);
  • Actual
    • Q(E);
    • Threat
      • R(J)+S(H),DCHECK
    • Vars
      • K(c);S_FLIGHT,XP(D)::S(H)
      • K(c);P-FLIGHT::R(J)+S(H)
      • R(e);SBLOCK::B(I)+S(G),DCHECK
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