MESON Chess Problem Database

Problem Display
PID: 96684 (1K6/8/p1k3bR/Q7/nP2N3/PN4n1/2r3BB/2R5 w - - 0 1)

Salardini, Erio

Il Problema, 1933

1K6/8/p1k3bR/Q7/nP2N3/PN4n1/2r3BB/2R5

#2

10 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Sec5#
    • 1...Sf5
      • 2.Sf6#
  • Tries
    • 1.Sec5+?
      • 1...Kd6
        • 2.Qc7#
      • 1...Se4
        • 2.Bxe4#
      • 1...Rxg2!
    • 1.Rd1?
      • threat
        • 2.Rd6#
        • 2.Rxg6#
      • 1...Rf2
        • 2.Rd6#
      • 1...Sf5
        • 2.Sf2#
      • 1...Sh5
        • 2.Sf2#
        • 2.Rd6#
      • 1...Sc5
        • 2.Rd6#
      • 1...Rd2!
    • 1.Qc7+?
      • 1...Kb5
        • 2.Sd4#
        • 2.Sd6#
      • 1...Kd5!
    • 1.Qd5+?
      • 1...Kb6
        • 2.Qb7#
      • 1...Kxd5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Sd4#
      • 1...Kb5
        • 2.Sd6#
      • 1...Se2
        • 2.Sc3#
      • 1...Sf5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::B(B)+S(G)
  • Tries
    • Try
      • S(G);CHECK,N_PINR(a)
      • Vars
        • K(e);P-FLIGHT,P_SPINS(b)::QAB1(H)
        • S(b);N_GUARD,P_SPINS(b)::B(B),XS(b)
      • Refutation
        • R(a);XB(B)
    • Try
      • R(A);N_PINR(a)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::R1(A)
        • S(b);N_GUARD::B(B)+S(G)
        • S(c);::R1(A)
      • Refutation
        • R(a);
    • Try
      • Q(H);CHECK
      • Refutation
        • K(e);N_SPINB(f),N_SPINR(a),S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);N_SPINR(a),OGATE,P-FLIGHT::QAR1(H)
      • Refutation
        • K(e);N_SPINB(f),N_SPINR(a),S_FLIGHT,XQ(H)
  • Actual
    • Q(H);
    • Threat
      • S(E)
    • Vars
      • K(e);N_SPINB(f),N_SPINR(a),S_FLIGHT::S(G)
      • S(b);N_GUARD::B(B)+S(G)
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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).