MESON Chess Problem Database

Problem Display
PID: 194688 (Nb3rq1/p1B3P1/5n2/2kB1R2/PnN4Q/4P2K/bP1rp3/8 w - - 0 1)

Makaronets, Leonid

Best Problems, 2019

Nb3rq1/p1B3P1/5n2/2kB1R2/PnN4Q/4P2K/bP1rp3/8

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb2
      • 2.Qd4#
    • 1...Rc2
      • 2.Qd4#
    • 1...Rd4
      • 2.Qxd4#
      • 2.exd4#
    • 1...Bxc4
      • 2.Qxc4#
    • 1...Sg4
      • 2.Qe7#
    • 1...Sh5
      • 2.Qe7#
    • 1...Sd7
      • 2.Qe7#
    • 1...Sh7
      • 2.Qe7#
    • 1...a5
      • 2.Bb6#
    • 1...a6
      • 2.Bb6#
  • Keys
    • 1.Sa5!
      • threat
        • 2.Sb7#
      • 1...Qxd5
        • 2.gxf8Q#
        • 2.gxf8B#
      • 1...Rxd5
        • 2.Qd4#
      • 1...Bxd5
        • 2.Qc4#
      • 1...Sbxd5
        • 2.b4#
      • 1...Sfxd5
        • 2.Qe7#

This is after

After Colanari.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • R(b);N_GUARD,XP(A)::QAB1(F)
    • R(b);N_GUARD::QAB1(F)
    • B(a);OGATE,XS(E)::QAR1(F),XB(a)
    • S(f);OGATE::QAB(F)
    • P(g);N_GUARD::B(I)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • Q(j);N_GUARD,P_SPINQ(j),XB(G)::PXR(i)=Q
      • R(b);N_GUARD,P_SPINR(b),XB(G)::QAB1(F)
      • B(a);N_GUARD,P_SPINB(a),XB(G)::QAR1(F)
      • S(d);OGATE,P_SPINS(d),XB(G)::P(A)
      • S(f);OGATE,P_SPINS(f),XB(G)::QAB(F)
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