MESON Chess Problem Database

Problem Display
PID: 198224 (1b5n/r4RQ1/2P1kppN/4P1q1/p1N2p2/7r/B1P5/2K1R3 w - - 0 1)

Roura, Juan R

L'Alfiere di Re, 1920

1b5n/r4RQ1/2P1kppN/4P1q1/p1N2p2/7r/B1P5/2K1R3

#2

10 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Sb2#
      • 2.Sd2#
      • 2.Sa3#
      • 2.Sa5#
      • 2.Sb6#
      • 2.Sd6#
    • 1...Rh2
      • 2.Sb2#
      • 2.Sd2#
      • 2.Sa3#
      • 2.Sa5#
      • 2.Sb6#
      • 2.Sd6#
    • 1...Ra3
      • 2.Sxa3#
    • 1...Rh4
      • 2.Sb2#
      • 2.Sd2#
      • 2.Sa3#
      • 2.Sa5#
      • 2.Sb6#
      • 2.Sd6#
    • 1...Rh5
      • 2.Sb2#
      • 2.Sd2#
      • 2.Sa3#
      • 2.Sa5#
      • 2.Sb6#
      • 2.Sd6#
    • 1...Rxh6
      • 2.Sd6#
    • 1...f3+
      • 2.Sd2#
    • 1...f5
      • 2.Se3#
  • Keys
    • 1.Rd7!
      • threat
        • 2.Qe7#
      • 1...f3+
        • 2.Sd2#
      • 1...Qxh6
        • 2.Qxf6#
      • 1...Rxh6
        • 2.Sd6#
      • 1...Rxd7
        • 2.Qxd7#
      • 1...fxe5
        • 2.Se3#
      • 1...Bd6
        • 2.Rxd6#
      • 1...Sf7
        • 2.Qxf7#
      • 1...f5
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::B(C)+S(E),XR(a)
    • R(a);N_GUARD,XS(H)::B(C)+S(E)
    • P(c);CHECK,S_CUTR(a)::B(C)+S(E)
    • P(f);::B(C)+S(E)
  • Actual
    • R(I);
    • Threat
      • QAR1(J)
    • Vars
      • P(c);CHECK,S_CUTR(a)::B(C)+S(E)
      • Q(d);N_GUARD,XS(H)::QAR1(J),XP(f)
      • R(a);N_GUARD,XS(H)::B(C)+S(E)
      • R(h);OGATE,XR(I)::QAB1(J),XR(h)
      • P(f);P_SPINP(f),XP(F)::B(C)+S(E)
      • B(i);N_GUARD::R1(I),XB(i)
      • S(j);N_GUARD::QAB1(J),XS(j)
      • P(f);::B(C)+S(E)
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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).