MESON Chess Problem Database

Problem Display
PID: 252345 (2B1n3/8/8/6N1/4bkpP/2Q5/3P4/4K3 w - - 0 1)

Magini, Fabio

Best Problems, 2021

2B1n3/8/8/6N1/4bkpP/2Q5/3P4/4K3

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qe3#
    • 1...Bh1
      • 2.Qe3#
    • 1...Bc2
      • 2.Qe3#
    • 1...Bg2
      • 2.Qe3#
    • 1...Bd5
      • 2.Qe3#
    • 1...Bf5
      • 2.Qe3#
    • 1...Bc6
      • 2.Qe3#
    • 1...Bg6
      • 2.Qe3#
    • 1...Bb7
      • 2.Qe3#
    • 1...Bh7
      • 2.Qe3#
    • 1...Ba8
      • 2.Qe3#
    • 1...Sf6
      • 2.Qc7#
    • 1...Sc7
      • 2.Qxc7#
    • 1...Sg7
      • 2.Qc7#
    • 1...g3
      • 2.Sh3#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Qg3#
      • 1...g3+
        • 2.Qxg3#
      • 1...Bf3
        • 2.Qe3#
      • 1...Bd3!
    • 1.Sf7?
      • threat
        • 2.Qe3#
      • 1...Bf3
        • 2.Qe5#
      • 1...Bd3!
    • 1.Qc7+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sxc7!
  • Keys
    • 1.Qd4!
      • 1...Kg3
        • 2.Qf2#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sf6
        • 2.Qd6#
      • 1...Sc7
        • 2.Qd6#
      • 1...Sg7
        • 2.Qd6#
      • 1...g3
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • B(a);::QAB1(C)
    • S(d);N_GUARD::QAB(C)
    • S(d);N_GUARD::QAB(C),XS(d)
    • P(c);N_GUARD::S(E)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAB1(C)
      • Vars
        • P(c);CHECK::QAB1(C),XP(c)
        • B(a);::QAB1(C)
      • Refutation
        • B(a);
    • Try
      • S(E);
      • Threat
        • QAB1(C)
      • Vars
        • B(a);SBLOCK::QAB1(C)
      • Refutation
        • B(a);
    • Try
      • Q(C);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB(C),XS(d)
      • Refutation
        • S(d);XQ(C)
  • Actual
    • Q(C);P_PINB(a)
    • Vars
      • K(b);N_GUARD,N_SPINB(a),S_CUTB(a),S_FLIGHT::QAB1(C)
      • S(d);N_GUARD::QAB(C),XS(d)
      • S(d);N_GUARD::QAB(C)
      • P(c);SBLOCK::QAR1(C),XB(a)
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