MESON Chess Problem Database

Problem Display
PID: 202282 (1B4B1/4bN2/3r1nR1/3k4/2Np1P2/2nQ1K2/8/2R5 w - - 0 1)

Aprile, Giuseppe

L'Alfiere di Re, 1923

1B4B1/4bN2/3r1nR1/3k4/2Np1P2/2nQ1K2/8/2R5

#2

9 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Sfe5#
  • Tries
    • 1.Sa5?
      • threat
        • 2.Qc4#
        • 2.Qf5#
      • 1...Ke6
        • 2.Se5#
      • 1...Rc6
        • 2.Qf5#
      • 1...Re6
        • 2.Qc4#
      • 1...Sce4
        • 2.Qc4#
        • 2.Qb3#
      • 1...Sfe4
        • 2.Qc4#
      • 1...Sg4
        • 2.Qc4#
      • 1...Sd7
        • 2.Qc4#
      • 1...Kc5!
    • 1.Scxd6?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qb5#
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Se5#
        • 2.Qf5#
      • 1...Bxd6!
    • 1.Rg5+?
      • 1...Ke6
        • 2.Qf5#
      • 1...Kc6!
  • Keys
    • 1.Sa3!
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qb5#
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Se5#
      • 1...Rc6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINP(b),P_SPINS(e),S_FLIGHT::B(I)+S(G)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_SPINP(b),P_SPINS(e),S_FLIGHT::B(I)+S(G)
        • R(d);::QAR2(B)
        • R(d);SBLOCK::QAB1(B)
        • S(e);::QAB1(B)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,P_SPINS(a)
    • Try
      • S(D);XR(d)
      • Threat
        • QAB1(B)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT,P_SPINS(a)::QAR1(B)
        • K(c);N_SPINP(b),P_SPINS(a),S_FLIGHT::QAB1(B)
      • Refutation
        • B(f);XS(D)
    • Try
      • R(F);CHECK
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::QAB1(B)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAB1(B)
    • Vars
      • K(c);N_SPINP(b),P-FLIGHT,P_SPINS(a)::QAR1(B)
      • K(c);N_SPINP(b),P_SPINS(a),S_FLIGHT::QAB1(B)
      • K(c);N_SPINP(b),P_SPINS(e),S_FLIGHT::B(I)+S(G)
      • R(d);SBLOCK::QAR2(B)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).