MESON Chess Problem Database

Problem Display
PID: 207197 (8/3p4/Q7/2PpN1P1/1P1k2p1/2bP4/1B3P2/2K5 w - - 0 1)

Paclt, Josef

Svetozor, 1868

8/3p4/Q7/2PpN1P1/1P1k2p1/2bP4/1B3P2/2K5

#2

9 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qf6#
    • 1...g3
      • 2.Sf3#
    • 1...d6
      • 2.Sc6#
  • Tries
    • 1.Kb1?
      • 1...Kxe5
        • 2.Qf6#
      • 1...g3
        • 2.Sf3#
      • 1...d6
        • 2.Sc6#
      • 1...Bxb2!
    • 1.Kd1?
      • 1...Kxe5
        • 2.Qf6#
      • 1...g3
        • 2.Sf3#
      • 1...d6
        • 2.Sc6#
      • 1...Bxb2!
    • 1.Kc2?
      • threat
        • 2.Bxc3#
      • 1...Kxe5
        • 2.Qf6#
      • 1...Bxb2!
    • 1.Qa1?
      • threat
        • 2.Bxc3#
      • 1...Bxb2+
        • 2.Qxb2#
      • 1...Kxe5!
    • 1.Qa3?
      • threat
        • 2.Bxc3#
        • 2.Qxc3#
      • 1...Bxb2+
        • 2.Qxb2#
      • 1...Kxe5!
    • 1.Qg6?
      • 1...Kxe5
        • 2.Qf6#
      • 1...g3
        • 2.Sf3#
      • 1...d6
        • 2.Sc6#
      • 1...Bxb2+!
  • Keys
    • 1.Ba1!
      • 1...Bb2+
        • 2.Bxb2#
      • 1...Kxe5
        • 2.Qf6#
      • 1...Bxa1
        • 2.Qxa1#
      • 1...g3
        • 2.Sf3#
      • 1...d6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(G)::QAB1(I)
    • P(c);N_GUARD::S(G)
    • P(e);N_GUARD::S(G)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(G)::QAB1(I)
        • P(c);N_GUARD::S(G)
        • P(e);N_GUARD::S(G)
      • Refutation
        • B(a);N_SPINB(a),XB(B)
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(G)::QAB1(I)
        • P(c);N_GUARD::S(G)
        • P(e);N_GUARD::S(G)
      • Refutation
        • B(a);N_SPINB(a),XB(B)
    • Try
      • K(A);P-FLIGHT
      • Threat
        • B(B),XB(a)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(G)::QAB1(I)
      • Refutation
        • B(a);N_SPINB(a),XB(B)
    • Try
      • Q(I);
      • Threat
        • B(B),XB(a)
      • Vars
        • B(a);CHECK,OGATE,XB(B)::QAB(I),XB(a)
      • Refutation
        • K(b);S_FLIGHT,XS(G)
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);CHECK,N_SPINB(a),OGATE,XB(B)::QAB(I),XB(a)
      • Refutation
        • K(b);S_FLIGHT,XS(G)
    • Try
      • Q(I);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(G)::QAB1(I)
        • P(c);N_GUARD::S(G)
        • P(e);N_GUARD::S(G)
      • Refutation
        • B(a);CHECK,N_SPINB(a),XB(B)
  • Actual
    • B(B);
    • Vars
      • B(a);CHECK,OGATEB::B(B),XB(a)
      • K(b);OGATEB,S_FLIGHT,XS(G)::QAB1(I)
      • B(a);N_SPINB(a),OGATE,XB(B)::QAB(I),XB(a)
      • P(c);N_GUARD::S(G)
      • P(e);N_GUARD::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).