MESON Chess Problem Database

Problem Display
PID: 47851 (b1Q5/8/2n1PR2/2P5/1nkP4/2N5/3PP1N1/1R4BK w - - 0 1)

Slesarenko, Anatoly Vasilevich

2nd Prize, Pilchenko-50 JT (Uralski Problemist), 2003

b1Q5/8/2n1PR2/2P5/1nkP4/2N5/3PP1N1/1R4BK

#2

12 + 4

15174 FIDE Album (2001-2003) 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qa6#
    • 1...Sc2
      • 2.Qa6#
    • 1...Sd3
      • 2.Qa6#
    • 1...Sd5
      • 2.Qa6#
    • 1...Sa6
      • 2.Qxa6#
  • Tries
    • 1.Qb7?
      • threat
        • 2.Qb5#
      • 1...Sxd4
        • 2.Qxb4#
      • 1...Sa7
        • 2.Rxb4#
        • 2.Qxb4#
      • 1...Bxb7!
    • 1.Qd7?
      • threat
        • 2.Se3#
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sa5
        • 2.Qb5#
      • 1...Se5
        • 2.Qb5#
      • 1...Se7
        • 2.Qb5#
      • 1...Sb8
        • 2.Qb5#
      • 1...Sd8
        • 2.Qb5#
      • 1...Sa7!
    • 1.d5?
      • 1...Sxd5
        • 2.Qa6#
      • 1...Sa2
        • 2.Qa6#
      • 1...Sc2
        • 2.Qa6#
      • 1...Sd3
        • 2.Qa6#
      • 1...Sa6
        • 2.Qxa6#
      • 1...Sd4
        • 2.Se3#
      • 1...Sa5
        • 2.Rf4#
      • 1...Se5
        • 2.Rf4#
      • 1...Sa7
        • 2.Rf4#
      • 1...Se7
        • 2.Rf4#
      • 1...Sb8
        • 2.Rf4#
      • 1...Sd8
        • 2.Rf4#
      • 1...Bb7!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Se3#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...Sc2
        • 2.Qa6#
      • 1...Sd5
        • 2.Qa6#
      • 1...Sa5
        • 2.d5#
      • 1...Se5
        • 2.d5#
      • 1...Sa7
        • 2.d5#
      • 1...Se7
        • 2.d5#
      • 1...Sb8
        • 2.d5#
      • 1...Sd8
        • 2.d5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::QAB(L)
    • S(a);N_GUARD::QAB(L),XS(a)
  • Tries
    • Try
      • Q(L);
      • Threat
        • QAB1(L)
      • Vars
        • S(c);N_GUARD,XP(H)::QAR1(L),XS(a)
      • Refutation
        • B(d);XQ(L)
    • Try
      • Q(L);
      • Threat
        • S(F)
      • Vars
        • S(c);OGATE,P_PINS(F),XP(H)::QAR1(L),XS(c)
        • S(a);N_GUARD::QAB1(L)
        • S(a);N_GUARD::QAB1(L),XS(a)
        • S(c);OGATE,P_PINS(F)::QAB1(L)
      • Refutation
        • S(c);P_PINS(F)
    • Try
      • P(H);
      • Vars
        • S(a);N_GUARD,XP(H)::QAB(L)
        • S(a);N_GUARD::QAB(L)
        • S(a);N_GUARD::QAB(L),XS(a)
        • S(c);SBLOCK::S(F)
        • S(c);N_GUARD::R(K)
      • Refutation
        • B(d);
  • Actual
    • R(K);
    • Threat
      • S(F)
    • Vars
      • S(c);OGATE,P_PINS(F),P_SPINS(c),XP(H)::R1(K),XS(c)
      • S(a);N_GUARD::QAB(L)
      • S(c);N_GUARD,P_PINS(F)::R(K)+P(H)
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