MESON Chess Problem Database

Problem Display
PID: 194971 (8/2NK2Q1/1p1PP1p1/2k3r1/R1p5/N2p1PP1/q2P4/8 w - - 0 1)

Petrovay, Istvan

Deutsches Wochenschach, 1918

8/2NK2Q1/1p1PP1p1/2k3r1/R1p5/N2p1PP1/q2P4/8

#2

10 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rxc4#
    • 1...Qa1
      • 2.Rxc4#
    • 1...Qb2
      • 2.Rxc4#
    • 1...Qxd2
      • 2.Rxc4#
    • 1...Rxg3
      • 2.Qe5#
    • 1...Rg4
      • 2.Qe5#
    • 1...Rd5
      • 2.Sa6#
    • 1...Re5
      • 2.Qxe5#
    • 1...c3
      • 2.Qd4#
  • Tries
    • 1.Ra5+?
      • 1...Kb4
        • 2.Qc3#
      • 1...b5
        • 2.Rxb5#
      • 1...bxa5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qg1#
      • 1...Qxa1
        • 2.Rxc4#
      • 1...Qxd2
        • 2.Rxc4#
      • 1...Rxg3
        • 2.Qe5#
      • 1...Qb2
        • 2.Rxc4#
      • 1...Qb1
        • 2.Rxc4#
      • 1...Rg4
        • 2.Qe5#
      • 1...Rd5
        • 2.Sa6#
      • 1...Re5
        • 2.Qxe5#

There are these versions: 195110

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_GUARD::R1(E),XP(c)
    • Q(a);N_GUARD,XP(A)::R1(E),XP(c)
    • R(e);N_GUARD,XP(D)::QAR2(J)
    • R(e);N_GUARD::QAR2(J)
    • R(e);P_PINP(F),SBLOCK::S(H)
    • R(e);N_GUARD::QAR2(J),XR(e)
    • P(c);::QAB1(J)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB1(J)
        • P(f);P_SPINP(f)::R1(E),XP(f)
      • Refutation
        • P(f);XR(E)
  • Actual
    • Q(J);
    • Threat
      • QAB(J)
    • Vars
      • Q(a);N_GUARD,XQ(J)::R1(E),XP(c)
      • Q(a);N_GUARD,XP(A)::R1(E),XP(c)
      • R(e);N_GUARD,XP(D)::QAR2(J)
      • Q(a);N_GUARD::R1(E),XP(c)
      • R(e);N_GUARD::QAR2(J)
      • R(e);P_PINP(F),SBLOCK::S(H)
      • R(e);N_GUARD::QAR2(J),XR(e)
HTML5 logo

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).