MESON Chess Problem Database

Problem Display
PID: 89774 (K4n2/1Q6/3pp1p1/1np3bq/N4R2/pk3b1R/rp3N1r/1B2B3 w - - 0 1)

Dyachuk, Vasyl Vasilovich

Die Schwalbe, 1997

K4n2/1Q6/3pp1p1/1np3bq/N4R2/pk3b1R/rp3N1r/1B2B3

#2

8 + 14

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Rhxf3#
    • 1...Qh6
      • 2.Rhxf3#
    • 1...Qh7
      • 2.Rhxf3#
    • 1...d5
      • 2.Sxc5#
      • 2.Qxb5#
  • Tries
    • 1.Be4?
      • threat
        • 2.Qxb5#
      • 1...Kxa4
        • 2.Bc2#
      • 1...Kc4
        • 2.Bd5#
      • 1...Ra1!
    • 1.Qxf3+?
      • 1...Sc3
        • 2.Qb7#
        • 2.Qxc3#
      • 1...Qxf3+!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qxb5#
      • 1...Kxa4
        • 2.Sxc5#
      • 1...Kc4
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(j);N_GUARD::R(D),XB(f)
  • Tries
    • Try
      • B(A);N_SPINQ(G)
      • Threat
        • QAR2(G),XS(g)
      • Vars
        • K(e);N_SPINB(f),N_SPINS(g),S_FLIGHT,XS(E)::R(F)+B(A),DCHECK
        • K(e);N_SPINB(f),N_SPINS(g),S_FLIGHT::R(F)+B(A),DCHECK
      • Refutation
        • R(a);
    • Try
      • Q(G);CHECK,N_PINS(g),N_SPINQ(G),XB(f)
      • Refutation
        • Q(j);CHECK,P_SPINQ(j),XQ(G)
  • Actual
    • S(C);N_SPINQ(G)
    • Threat
      • QAR2(G),XS(g)
    • Vars
      • K(e);N_SPINB(f),N_SPINS(g),S_FLIGHT,XS(E)::R(F)+S(C),DCHECK,XP(h)
      • K(e);N_SPINB(f),N_SPINS(g),S_FLIGHT::R(F)+S(C),DCHECK
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