MESON Chess Problem Database

Problem Display
PID: 267878 (2N2B2/6bq/1RP1p2P/3kn1Q1/r1n3p1/pN1p1PK1/2R3b1/2r5 w - - 0 1)

Rychkov, Vladimir Nikolaevich

Probleemblad, 1985

2N2B2/6bq/1RP1p2P/3kn1Q1/r1n3p1/pN1p1PK1/2R3b1/2r5

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Rb5#
    • 1...Sd2
      • 2.Rb5#
    • 1...Se3
      • 2.Rb5#
    • 1...Sa5
      • 2.Rb5#
    • 1...Sxb6
      • 2.Sxb6#
    • 1...Sd6
      • 2.Se7#
  • Tries
    • 1.Qd8+?
      • 1...Sd6
        • 2.Se7#
        • 2.Rb5#
        • 2.Qxd6#
      • 1...Sd7!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qd4#
      • 1...Sxb6
        • 2.Sxb6#
      • 1...Sxf3
        • 2.Se7#
      • 1...Sxc6
        • 2.Rb5#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Sb2
        • 2.Rb5#
      • 1...Sd2
        • 2.Rb5#
      • 1...Se3
        • 2.Rb5#
      • 1...Sa5
        • 2.Rb5#
      • 1...Sd6
        • 2.Se7#
      • 1...Sg6
        • 2.Qe4#
      • 1...Sd7
        • 2.Se7#
      • 1...Sf7
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(f);::R(F)
    • S(f);XR(F)::S(I),XS(f)
    • S(f);SBLOCK::S(I)
  • Tries
    • Try
      • Q(E);CHECK,N_PINS(i)
      • Refutation
        • S(i);P_SPINS(i)
  • Actual
    • Q(E);N_PINS(i)
    • Threat
      • QAR1(E)
    • Vars
      • S(f);XR(F)::S(I),XS(f)
      • S(i);XP(C)::S(I)
      • S(i);SBLOCK,XP(G)::R(F)
      • Q(l);N_GUARD::QAB1(E),XQ(l)
      • S(f);::R(F)
      • S(f);SBLOCK::S(I)
      • S(i);S_CUTQ(l)::QAB1(E)
      • S(i);::S(I)
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