MESON Chess Problem Database

Problem Display
PID: 273591 (2R1RQ1K/ppb5/2P1pp2/1p1k1N2/1PN1p3/1n1p4/B7/8 w - - 0 1)

Pituk, Alexander

diagrammes, 1978

2R1RQ1K/ppb5/2P1pp2/1p1k1N2/1PN1p3/1n1p4/B7/8

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qc5#
    • 1...Kxc6
      • 2.Qd6#
    • 1...Be5
      • 2.Sce3#
    • 1...Sa1
      • 2.Qc5#
    • 1...Sc1
      • 2.Qc5#
    • 1...Sd2
      • 2.Qc5#
    • 1...Sd4
      • 2.Se7#
      • 2.Qc5#
    • 1...Sa5
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
  • Tries
    • 1.Sce3+?
      • 1...Kxc6
        • 2.Qd6#
      • 1...Ke5!
    • 1.Sfe3+?
      • 1...Kxc6
        • 2.Qd6#
      • 1...Kd4!
    • 1.Qd6+?
      • 1...Kxc4
        • 2.Qc5#
        • 2.Qd4#
      • 1...Bxd6!
    • 1.Qe7?
      • threat
        • 2.Qxe6#
      • 1...Kxc4
        • 2.Qc5#
      • 1...Kxc6
        • 2.Qd6#
        • 2.Qxe6#
      • 1...Sd4
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...e5
        • 2.Qe6#
      • 1...exf5!
  • Keys
    • 1.Qxf6!
      • threat
        • 2.Qxe6#
      • 1...Kxc4
        • 2.Qd4#
      • 1...Kxc6
        • 2.Qxe6#
      • 1...exf5
        • 2.Se3#
      • 1...Be5
        • 2.Sce3#
      • 1...Sd4
        • 2.Se7#
      • 1...Sc5
        • 2.Se7#
      • 1...e5
        • 2.Sce3#
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(e);P_SPINS(a),S_FLIGHT,XS(C)::QAR1(H)
    • K(e);N_GUARD,P_SPINB(j),S_FLIGHT,XP(E)::QAR1(H)
    • B(j);SBLOCK::S(C)
    • S(a);N_GUARD::QAR1(H)
    • S(a);N_GUARD::QAR1(H),XS(a)
  • Tries
    • Try
      • S(C);CHECK,P_PINS(a)
      • Vars
        • K(e);N_SPINS(a),P_SPINB(j),S_FLIGHT,XP(E)::QAR1(H)
      • Refutation
        • K(e);N_SPINS(a),P-FLIGHT,P_SPINP(f)
    • Try
      • S(D);CHECK
      • Vars
        • K(e);P_SPINB(j),S_FLIGHT,XP(E)::QAR1(H)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(H);CHECK
      • Refutation
        • B(j);XQ(H)
    • Try
      • Q(H);
      • Threat
        • QAB1(H),XP(f)
      • Vars
        • K(e);P_SPINS(a),S_FLIGHT,XS(C)::QAR1(H)
        • S(a);N_GUARD::QAR1(H)
        • S(a);N_GUARD::QAR1(H),XS(a)
        • P(f);::QAB1(H)
      • Refutation
        • P(f);XS(D)
  • Actual
    • Q(H);XP(g)
    • Threat
      • QAB1(H),XP(f)
    • Vars
      • K(e);N_GUARD,P_SPINS(a),S_FLIGHT,XS(C)::QAR1(H)
      • K(e);P_SPINB(j),P_SPINP(f),S_FLIGHT,XP(E)::QAR2(H),XP(f)
      • P(f);XS(D)::S(C)
      • B(j);P_PINQ(H)::S(C)
      • S(a);::S(D)
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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).