MESON Chess Problem Database

Problem Display
PID: 87607 (4b2Q/B6B/4p2p/1k2r2q/R1R1p2n/K4p2/4p3/8 w - - 0 1)

Lebedinets, Nikolai Grigorevich

The Problemist, 1993

4b2Q/B6B/4p2p/1k2r2q/R1R1p2n/K4p2/4p3/8

#2

6 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Qxe5#
      • 2.Qxe8#
    • 1...Qg6
      • 2.Qxe5#
    • 1...Qf7
      • 2.Qxe5#
    • 1...Qf5
      • 2.Qxe8#
    • 1...Qg5
      • 2.Qxe8#
    • 1...Rd5
      • 2.Qb2#
    • 1...Rf5
      • 2.Qb2#
    • 1...Rg5
      • 2.Qb2#
    • 1...Bc6
      • 2.Rcb4#
    • 1...Bg6
      • 2.Qb8#
    • 1...Bd7
      • 2.Qb8#
    • 1...Bf7
      • 2.Qb8#
    • 1...Sf5
      • 2.Qxe5#
    • 1...Sg6
      • 2.Qxe8#
  • Tries
    • 1.Bg6?
      • threat
        • 2.Qxe8#
      • 1...Qxg6
        • 2.Qxe5#
      • 1...Bxg6
        • 2.Qb8#
      • 1...Rd5
        • 2.Qb2#
      • 1...Bc6
        • 2.Rcb4#
      • 1...Bd7
        • 2.Qb8#
      • 1...Bf7
        • 2.Qb8#
      • 1...Rc5!
    • 1.Qg7?
      • threat
        • 2.Qb7#
      • 1...Qf7
        • 2.Qxe5#
      • 1...Bc6
        • 2.Rcb4#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Bf7!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Qxe5#
      • 1...Qxf5
        • 2.Qxe8#
      • 1...Rxf5
        • 2.Qb2#
      • 1...Rc5
        • 2.Rxc5#
      • 1...Rd5
        • 2.Qb2#
      • 1...Bc6
        • 2.Rcb4#
      • 1...Sg6
        • 2.Qxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(g);N_GUARD::QAR(F),XR(f)
    • Q(g);N_GUARD::QAB(F),XB(j)
    • R(f);OGATE::QAR(F)
    • B(j);SBLOCK::R1(C)
    • B(j);OGATE::QAR(F)
    • S(d);S_CUTQ(g)::QAR(F),XR(f)
    • S(d);S_CUTQ(g)::QAB(F),XB(j)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAB(F),XB(j)
      • Vars
        • Q(g);N_GUARD,XB(E)::QAR(F),XR(f)
        • B(j);OGATE,XB(E)::QAR(F)
        • R(f);OGATE::QAR(F)
        • B(j);SBLOCK::R1(C)
        • B(j);OGATE::QAR(F)
      • Refutation
        • R(f);
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • Q(g);N_GUARD::QAR(F),XR(f)
        • B(j);SBLOCK::R1(C)
        • B(j);N_GUARD::QAB(F),XB(j)
      • Refutation
        • B(j);
  • Actual
    • B(E);
    • Threat
      • QAR(F),XR(f)
    • Vars
      • Q(g);N_GUARD,XB(E)::QAB(F),XB(j)
      • R(f);OGATE,XB(E)::QAR(F)
      • R(f);N_GUARD::R1(C),XR(f)
      • R(f);OGATE::QAR(F)
      • B(j);SBLOCK::R1(C)
      • S(d);S_CUTQ(g)::QAB(F),XB(j)
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