MESON Chess Problem Database

Problem Display
PID: 257497 (Q2NK3/2B3p1/2B1P1rp/1p5r/3k4/1P1p1P2/1N1P4/8 w - - 0 1)

Pries, Alfred

Wiener Schachzeitung, 1932

Q2NK3/2B3p1/2B1P1rp/1p5r/3k4/1P1p1P2/1N1P4/8

#2

10 + 7

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qa7#
    • 1...Rh2
      • 2.Qa7#
    • 1...Rh3
      • 2.Qa7#
    • 1...Rh4
      • 2.Qa7#
    • 1...Rxe6+
      • 2.Sxe6#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qb4#
      • 1...Rxe6+
        • 2.Sxe6#
      • 1...b4
        • 2.Qxb4#
      • 1...Rc5!
    • 1.Qa4+?
      • 1...Kc5
        • 2.Sxd3#
      • 1...b4
        • 2.Qxb4#
      • 1...bxa4!
    • 1.Qa5?
      • threat
        • 2.Qc3#
        • 2.Qb4#
      • 1...Rxe6+
        • 2.Sxe6#
      • 1...Kc5
        • 2.Qc3#
      • 1...b4
        • 2.Qxb4#
      • 1...Rc5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sa4#
      • 1...Rxe6+
        • 2.Sxe6#
      • 1...Kc5
        • 2.Sxd3#
      • 1...Rc5
        • 2.Sc4#
      • 1...Rh1
        • 2.Qa7#
      • 1...Rg1
        • 2.Qxg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(d);N_GUARD::QAB(H)
    • R(e);CHECK,XP(F)::S(I),XR(e)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAR2(H)
      • Vars
        • R(e);CHECK,XP(F)::S(I),XR(e)
        • P(c);::QAR2(H),XP(c)
      • Refutation
        • R(d);
    • Try
      • Q(H);CHECK
      • Vars
        • K(b);N_GUARD,S_CUTP(c),S_CUTP(c),S_FLIGHT::S(A),XP(a)
        • P(c);P_SPINP(c)::QAR2(H),XP(c)
      • Refutation
        • P(c);XQ(H)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);CHECK,XP(F)::S(I),XR(e)
        • K(b);P_SPINP(c),S_FLIGHT::QAR2(H)
        • P(c);::QAR2(H),XP(c)
      • Refutation
        • R(d);
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+S(A)
    • Vars
      • R(e);CHECK,XP(F)::S(I),XR(e)
      • K(b);N_GUARD,S_FLIGHT::S(A),XP(a)
      • R(d);SBLOCK::QAB(H)+S(A)
      • R(d);N_GUARD::QAB(H)
      • R(e);N_GUARD::QAB(H),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).