MESON Chess Problem Database

Problem Display
PID: 33464 (K2bN3/8/1pPPkPPp/4n3/p1P3P1/2N1R2B/Q7/3bnr2 w - - 0 1)

Olszewski, Peter

The Problemist Supplement, 2001

K2bN3/8/1pPPkPPp/4n3/p1P3P1/2N1R2B/Q7/3bnr2

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.gxf5#
    • 1...Sc2
      • 2.c5#
    • 1...Sf3
      • 2.g5#
  • Tries
    • 1.Se2?
      • threat
        • 2.Sd4#
      • 1...Rf4
        • 2.Sxf4#
      • 1...Sc2
        • 2.c5#
      • 1...Sf3
        • 2.Sf4#
        • 2.g5#
      • 1...Bxe2!
    • 1.Sb5?
      • threat
        • 2.Sd4#
      • 1...Sc2
        • 2.c5#
      • 1...Sf3
        • 2.g5#
      • 1...Rf4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sg7#
      • 1...Bxf6
        • 2.Sc7#
      • 1...Sxc4
        • 2.Sc3#
      • 1...Sxg4
        • 2.Sg3#
      • 1...Sxc6
        • 2.Sc5#
      • 1...Sxg6
        • 2.Sg5#
      • 1...S5d3
        • 2.Sc5#
        • 2.Sg5#
      • 1...S5f3
        • 2.Sc5#
        • 2.Sg5#
      • 1...Sd7
        • 2.Sc5#
        • 2.Sg5#
      • 1...Sf7
        • 2.Sc5#
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(c);OGATE::P(F),XR(c)
    • S(b);S_CUTB(a)::QAB(A)+P(E)
    • S(b);S_CUTB(a),S_CUTR(c)::B(D)+P(F)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • R(c);N_GUARD::S(B),XR(c)
        • S(b);S_CUTB(a)::QAB(A)+P(E)
      • Refutation
        • B(a);XS(B)
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • S(b);S_CUTB(a)::QAB(A)+P(E)
        • S(b);S_CUTB(a),S_CUTR(c)::B(D)+P(F)
      • Refutation
        • R(c);
  • Actual
    • S(B);N_PINS(e)
    • Threat
      • S(L)
    • Vars
      • B(i);N_GUARD,XP(I)::S(L)
      • S(e);P_SPINS(e),XP(E)::R(C)+S(B)
      • S(e);P_SPINS(e),XP(F)::R(C)+S(B)
      • S(e);XP(G)::R(C)+S(B),DCHECK
      • S(e);XP(J)::R(C)+S(B),DCHECK
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