MESON Chess Problem Database

Problem Display
PID: 177493 (b5K1/n1RPb3/4kBp1/2Pq1p2/2B1N1r1/4QN2/3r4/8 w - - 0 1)

Magini, Fabio

Best Problems, 2018

b5K1/n1RPb3/4kBp1/2Pq1p2/2B1N1r1/4QN2/3r4/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Sd4#
    • 1...Rb2
      • 2.Sd4#
    • 1...Rc2
      • 2.Sd4#
    • 1...Re2
      • 2.Sd4#
    • 1...Rf2
      • 2.Sd4#
    • 1...Rdg2
      • 2.Sd4#
    • 1...Rh2
      • 2.Sd4#
    • 1...Rd4
      • 2.Sxd4#
    • 1...Rf4
      • 2.Sfg5#
    • 1...Rh4
      • 2.Sfg5#
    • 1...Rg5
      • 2.Sfxg5#
    • 1...Bxc5
      • 2.d8S#
    • 1...Bd6
      • 2.d8S#
    • 1...Bxf6
      • 2.Seg5#
    • 1...Bf8
      • 2.d8S#
    • 1...Sc8
      • 2.dxc8Q#
      • 2.dxc8B#
  • Tries
    • 1.Qf4?
      • threat
        • 2.Qe5#
      • 1...Rxf4
        • 2.Sfg5#
      • 1...Bxf6
        • 2.Qd6#
      • 1...Bd6
        • 2.Qxd6#
        • 2.d8S#
      • 1...Sc6!
    • 1.Qc3?
      • threat
        • 2.Qe5#
      • 1...Rxe4
        • 2.Sg5#
      • 1...Bxf6
        • 2.Qxf6#
      • 1...Rd4
        • 2.Sxd4#
      • 1...Bd6
        • 2.d8S#
      • 1...Sc6!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qe5#
      • 1...Rxd4
        • 2.Sxd4#
      • 1...Rxe4
        • 2.Sg5#
      • 1...Bxf6
        • 2.Qxf6#
      • 1...Bd6
        • 2.d8S#
      • 1...Sc6
        • 2.Bxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • R(a);N_GUARD::S(B)
    • R(a);N_GUARD::S(B),XR(a)
    • R(b);N_GUARD::S(B)
    • R(b);N_GUARD::S(B),XR(b)
    • B(h);N_GUARD,XP(E)::P=S
    • B(h);N_GUARD::P=S
    • B(h);SBLOCK,XB(F)::QAR(A)+S(D),DCHECK
    • S(g);OGATE::PXS(g)=Q
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(b);N_GUARD,XQ(A)::S(B)
        • B(h);N_GUARD,XB(F)::QAR1(A)
      • Refutation
        • S(g);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(b);N_GUARD,XS(D)::S(B)
        • B(h);OGATE,XB(F)::QAR1(A),XB(h)
        • R(a);N_GUARD::S(B),XR(a)
        • B(h);N_GUARD::P=S
      • Refutation
        • S(g);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • R(a);XQ(A)::S(B),XR(a)
      • R(b);N_GUARD,XS(D)::S(B)
      • B(h);OGATE,XB(F)::QAR1(A),XB(h)
      • B(h);N_GUARD::P=S
      • S(g);S_CUTB(i)::B(C),XQ(c)
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