MESON Chess Problem Database

Problem Display
PID: 258858 (2QRrB2/K2p3r/2P1kbNN/3np3/1p6/8/8/8 w - - 0 1)

Salamanca, Tomas

Probleemblad, 1948

2QRrB2/K2p3r/2P1kbNN/3np3/1p6/8/8/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh6
      • 2.Qxd7#
    • 1...Rh8
      • 2.Qxd7#
    • 1...Se7
      • 2.Qxd7#
  • Tries
    • 1.Rxe8+?
      • 1...Re7
        • 2.Qxd7#
      • 1...Se7
        • 2.Qxd7#
      • 1...Be7!
  • Keys
    • 1.cxd7!
      • threat
        • 2.Qc6#
      • 1...Rxd7+
        • 2.Qxd7#
      • 1...Rxh6
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Be7
        • 2.dxe8S#
      • 1...Sc7
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Se7
        • 2.dxe8Q#
        • 2.dxe8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(g);N_GUARD,XS(C)::QAB1(E),XP(f)
    • R(g);N_GUARD::QAB1(E),XP(f)
    • S(b);S_CUTR(g)::QAB1(E),XP(f)
  • Tries
    • Try
      • R(F);CHECK,XR(h)
      • Vars
        • R(g);P_SPINR(g)::QAB1(E),XP(f)
        • S(b);P_SPINS(b)::QAB1(E),XP(f)
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • P(A);P_SPINP(A),XP(f)
    • Threat
      • QAR2(E)
    • Vars
      • R(g);CHECK,OGATE,P_SPINR(g),XP(A)::QAB1(E),XR(g)
      • R(g);N_PINP(A),XS(C)::PXR(h)=Q
      • B(e);N_PINP(A)::PXR(h)=S
      • S(b);N_PINP(A)::PXR(h)=Q
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).