MESON Chess Problem Database

Problem Display
PID: 205734 (1Kn4B/1Qpp3R/3Pk3/2PR4/2p1r3/3pN3/b6r/b7 w - - 0 1)

Markus, Gustav

Osterreichische Schachrundschau, 1925

1Kn4B/1Qpp3R/3Pk3/2PR4/2p1r3/3pN3/b6r/b7

#2

8 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Re5#
    • 1...Sb6
      • 2.Re7#
    • 1...Sa7
      • 2.Re7#
    • 1...Se7
      • 2.Rxe7#
    • 1...cxd6
      • 2.Qxd7#
    • 1...c6
      • 2.Qxd7#
  • Tries
    • 1.Re5+?
      • 1...Bxe5
        • 2.Qd5#
      • 1...Rxe5!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qd5#
      • 1...Rb2
        • 2.Rh6#
      • 1...Rd4
        • 2.Re5#
      • 1...Re5
        • 2.Rf6#
      • 1...Sb6
        • 2.Re7#
      • 1...Se7
        • 2.Rxe7#
      • 1...c3
        • 2.Qxe4#
      • 1...c6
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD,S_CUTB(a)::R1(C)
    • S(j);N_GUARD::R1(F)
    • S(j);N_GUARD::R1(F),XS(j)
    • P(h);OGATE,XP(D)::QAB1(E),XP(i)
    • P(h);OGATE::QAB1(E),XP(i)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • B(a);XR(C)::QAB1(E)
      • Refutation
        • R(f);XR(C)
  • Actual
    • R(C);
    • Threat
      • QAB1(E)
    • Vars
      • R(c);N_GUARD,P_PINQ(E),S_CUTB(a)::R(F)
      • R(f);N_GUARD,S_CUTB(a)::R1(C)
      • R(f);SBLOCK,S_CUTB(a)::R1(C)
      • S(j);N_GUARD::R1(F)
      • S(j);N_GUARD::R1(F),XS(j)
      • P(e);S_CUTB(a)::QAR2(E),XR(f)
      • P(h);OGATE::QAB1(E),XP(i)
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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).