MESON Chess Problem Database

Problem Display
PID: 252566 (K7/8/7B/7B/p1N1p1p1/pP1Pp3/P3PP2/1QNkn2R w - - 0 1)

Lider, Valentin Viktorovich

Schach-Aktiv, 1989

K7/8/7B/7B/p1N1p1p1/pP1Pp3/P3PP2/1QNkn2R

#2

12 + 7

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Bxe3?
      • 1...axb3
        • 2.Qxb3#
      • 1...exd3
        • 2.Qxd3#
      • 1...g3!
    • 1.Qb2?
      • threat
        • 2.Sxe3#
      • 1...exf2
        • 2.Se3#
        • 2.Qd2#
      • 1...axb2!
    • 1.bxa4?
      • 1...exf2
        • 2.Qb3#
      • 1...g3
        • 2.Sb3#
      • 1...exd3!
    • 1.dxe4?
      • 1...exf2
        • 2.Qd3#
      • 1...g3
        • 2.Sd3#
      • 1...axb3!
  • Keys
    • 1.Bxg4!
      • 1...exf2
        • 2.e3#
      • 1...axb3
        • 2.Sxb3#
      • 1...exd3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(K);XP(d)
      • Vars
        • P(e);OGATE,XP(G)::QAB(A),XP(e)
        • P(f);OGATE,XP(H)::QAR2(A),XP(f)
      • Refutation
        • P(g);
    • Try
      • Q(A);
      • Threat
        • S(I),XP(d)
      • Refutation
        • P(c);XQ(A)
    • Try
      • P(G);XP(e)
      • Vars
        • P(d);XP(F)::QAB(A)
        • P(g);::QAR(A)+S(B)
      • Refutation
        • P(f);XP(H)
    • Try
      • P(H);XP(f)
      • Vars
        • P(d);XP(F)::QAR2(A)
        • P(g);::QAR(A)+S(B)
      • Refutation
        • P(e);XP(G)
  • Actual
    • B(J);XP(g)
    • Vars
      • P(d);OGATE,XP(F)::B(J)+P(E)
      • P(e);XP(G)::QAR(A)+S(B),XP(e)
      • P(f);XP(H)::QAR(A)+S(B),XP(f)
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