MESON Chess Problem Database

Problem Display
PID: 159344 (2B5/4p1n1/2K1Pk1P/R1N5/2N2n1P/2P5/1BQ2R1b/6r1 w - - 0 1)

Shire, David J

The Problemist Supplement, 2016

2B5/4p1n1/2K1Pk1P/R1N5/2N2n1P/2P5/1BQ2R1b/6r1

#2

12 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6
      • 2.Se4#
  • Tries
    • 1.Se3?
      • threat
        • 2.c4#
      • 1...Ke5
        • 2.c4#
      • 1...Sxe6
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Rb1
        • 2.Sg4#
      • 1...Rd1
        • 2.Sg4#
      • 1...Rg5!
    • 1.Rxf4+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Bxf4!
    • 1.Qg6+?
      • 1...Rxg6
        • 2.Se4#
      • 1...Kxg6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sed7#
      • 1...Kxe5
        • 2.c4#
      • 1...Sxe6
        • 2.Scd7#
      • 1...Rd1
        • 2.Sg4#
      • 1...Sf5
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK::S(H)
  • Tries
    • Try
      • S(E);
      • Threat
        • B(A)+P(D)
      • Vars
        • K(d);N_SPINS(c),S_FLIGHT::B(A)+P(D)
        • S(f);N_GUARD,XP(J)::QAR1(B)
        • S(f);N_GUARD,N_SPINS(c)::QAR1(B),XS(f)
        • R(a);N_GUARD::S(E)
      • Refutation
        • R(a);
    • Try
      • R(C);CHECK,XS(c)
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR1(B),XS(f)
      • Refutation
        • B(b);XR(C)
    • Try
      • Q(B);CHECK
      • Vars
        • R(a);SBLOCK,XQ(B)::S(H)
      • Refutation
        • K(d);N_SPINS(c),P-FLIGHT,XQ(B)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(d);N_SPINS(c),S_FLIGHT,XS(E)::B(A)+P(D)
      • S(f);SBLOCK,XP(J)::S(H)
      • R(a);N_GUARD::S(E)
      • S(f);N_SPINS(c),SBLOCK::S(H)
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