MESON Chess Problem Database

Problem Display
PID: 266455 (4R1K1/5Q2/4p3/2Bb4/2p1k3/R1r2pb1/2P3P1/3N2r1 w - - 0 1)

Zaldo Zapirain, Juan

Probleemblad, 1950

4R1K1/5Q2/4p3/2Bb4/2p1k3/R1r2pb1/2P3P1/3N2r1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Re3#
    • 1...Re3
      • 2.Rxe3#
    • 1...Be5
      • 2.Sf2#
    • 1...e5
      • 2.Sxc3#
  • Tries
    • 1.Rxe6+?
      • 1...Be5
        • 2.Sf2#
        • 2.Sxc3#
      • 1...Bxe6!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qf5#
      • 1...Ke5
        • 2.Qf5#
      • 1...Rxe3
        • 2.Rxe3#
      • 1...Be5
        • 2.Qxf3#
      • 1...e5
        • 2.gxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATE,XP(B)::R1(D)
    • R(b);OGATE::R1(D),XR(b)
    • B(d);N_GUARD,N_SPINP(h),P_PINP(C),SBLOCK::S(A)
    • P(h);P_PINQ(F)::S(A),XR(b)
  • Tries
    • Try
      • R(G);CHECK,XP(h)
      • Refutation
        • B(g);P_PINQ(F),XR(G)
  • Actual
    • S(A);
    • Threat
      • QAB1(F)
    • Vars
      • K(f);P-FLIGHT::QAR1(F)
      • R(b);OGATE,XS(A)::R1(D),XR(b)
      • B(d);N_SPINP(h),P_PINP(C),SBLOCK::QAB1(F),XP(c)
      • P(h);P_PINQ(F)::P(C),XP(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).