MESON Chess Problem Database

Problem Display
PID: 225895 (8/8/5Kp1/3P4/1QPk2p1/1nr1R3/3PB3/8 w - - 0 1)

Kovacik, Jozef

Praca, 1956

8/8/5Kp1/3P4/1QPk2p1/1nr1R3/3PB3/8

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4
      • 2.Qxc4#
    • 1...Sa1
      • 2.Qb6#
    • 1...Sc1
      • 2.Qb6#
    • 1...Sxd2
      • 2.Qb6#
    • 1...Sa5
      • 2.Qb6#
    • 1...Sc5
      • 2.Qxc3#
  • Tries
    • 1.c5+?
      • 1...Rc4
        • 2.Qxc4#
      • 1...Kxd5!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Re4#
        • 2.dxc3#
      • 1...Rxe3
        • 2.Qxe3#
      • 1...Rxc4
        • 2.Rd3#
      • 1...Sxd2
        • 2.Qa7#
      • 1...Rd3
        • 2.Re4#
      • 1...Rc1
        • 2.Re4#
      • 1...Rc2
        • 2.Re4#
      • 1...Sc5
        • 2.Qe5#
        • 2.dxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(b);OGATE,P_SPINR(b),XP(E)::QAR1(D),XR(b)
    • S(a);N_GUARD::QAB(D)
    • S(a);N_GUARD,XP(A)::QAB(D)
    • S(a);SBLOCK::QAB1(D),XR(b)
  • Tries
    • Try
      • P(E);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(D),XR(b)
      • Refutation
        • K(c);P-FLIGHT,XP(F)
  • Actual
    • Q(D);
    • Threat
      • DUALS(2)
    • Vars
      • R(b);OGATE,XR(C)::QAB1(D),XR(b)
      • R(b);N_GUARD,SBLOCK,XP(E)::R1(C)
      • S(a);N_GUARD,XP(A)::QAB(D)
      • R(b);::R1(C)
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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).