MESON Chess Problem Database

Problem Display
PID: 267045 (N1R5/1p5p/b2p4/1k2qR1r/pPr5/P4Q2/2NPp1B1/b3K1B1 w - - 0 1)

Castellari, Umberto

El Ajedrez Espanol, 1935

N1R5/1p5p/b2p4/1k2qR1r/pPr5/P4Q2/2NPp1B1/b3K1B1

#2

11 + 11

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Sd4#
  • Tries
    • 1.Qc6+?
      • 1...bxc6
        • 2.Sc7#
      • 1...Rxc6!
    • 1.Qd3?
      • threat
        • 2.Sc7#
        • 2.Qxc4#
      • 1...Qd5
        • 2.Qxc4#
      • 1...Rh4
        • 2.Sc7#
      • 1...Bd4
        • 2.Sxd4#
        • 2.Qxc4#
      • 1...d5
        • 2.Rc5#
      • 1...Qc5!
  • Keys
    • 1.Qxe2!
      • threat
        • 2.Sc7#
      • 1...Qc5
        • 2.Qe8#
      • 1...Qd5
        • 2.Qxc4#
      • 1...Bd4
        • 2.Sxd4#
      • 1...d5
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(d);N_GUARD,S_CUTB(a)::S(C)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • P(j);XQ(G)::S(J)
      • Refutation
        • R(d);XQ(G)
    • Try
      • Q(G);P_PINR(d)
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);::QAB1(G),XR(d)
        • R(g);::S(J)
        • P(i);N_GUARD,N_SPINQ(f),S_CUTQ(f)::R1(K)
      • Refutation
        • Q(f);
  • Actual
    • Q(G);P_PINR(d),P_SPINQ(G),XP(b)
    • Threat
      • S(J)
    • Vars
      • Q(f);N_PINQ(G)::QAB(G)
      • Q(f);N_PINQ(G)::QAB1(G),XR(d)
      • B(a);N_GUARD::S(C),XB(a)
      • P(i);N_GUARD,N_SPINQ(f),S_CUTQ(f)::R1(K)
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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).