MESON Chess Problem Database

Problem Display
PID: 83944 (2b5/1p1npp2/2k1Br2/QpP1P2p/1p2Pp2/1r1n1N1K/5pP1/8 w - - 0 1)

Toth, Otto

Pravda, 1967

2b5/1p1npp2/2k1Br2/QpP1P2p/1p2Pp2/1r1n1N1K/5pP1/8

#2

8 + 14

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qc7#
    • 1...S3xc5
      • 2.Bd5#
    • 1...S7xc5
      • 2.Sd4#
    • 1...Sxe5
      • 2.Qb6#
    • 1...Sb6
      • 2.Qxb6#
    • 1...Sb8
      • 2.Qb6#
    • 1...Sf8
      • 2.Qb6#
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qxc8#
      • 1...Kxc5
        • 2.Qc7#
      • 1...S3xc5
        • 2.Bd5#
      • 1...S7xc5
        • 2.Sd4#
      • 1...Sb6
        • 2.Qxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • K(h);P-FLIGHT,P_SPINP(f),XP(F)::QAR2(E)
    • S(c);P_PINS(B),SBLOCK,XP(F)::B(H)
    • S(k);P_PINB(H),SBLOCK,XP(F)::S(B)
    • S(k);N_GUARD,P_PINB(H),XP(G)::QAR1(E)
    • S(k);N_GUARD,P_PINB(H)::QAR1(E),XS(k)
    • S(k);N_GUARD,P_PINB(H)::QAR1(E)
  • Actual
    • Q(E);
    • Threat
      • QAR2(E),XB(n)
    • Vars
      • K(h);P-FLIGHT,XP(F)::QAR2(E)
      • S(c);P_PINS(B),SBLOCK,XP(F)::B(H)
      • S(k);P_PINB(H),SBLOCK,XP(F)::S(B)
      • S(k);N_GUARD,P_PINB(H)::QAR1(E),XS(k)
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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).