MESON Chess Problem Database

Problem Display
PID: 178 (8/2R4B/2pr2r1/2Rb1k2/7P/8/5NQB/7K w - - 0 1)

Chicco, Adriano

2nd Prize, El Ajedrez Espanol, 1950

8/2R4B/2pr2r1/2Rb1k2/7P/8/5NQB/7K

#2

8 + 5

3105 FIDE Album (1945-1955) 1964
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Qf3#
    • 1...Rf6
      • 2.Qe4#
  • Tries
    • 1.Se4?
      • 1...Ke6
        • 2.Qxg6#
      • 1...Re6
        • 2.Qf3#
      • 1...Rd7
        • 2.Qxg6#
      • 1...Rd8
        • 2.Qxg6#
      • 1...Rf6!
    • 1.Rf7+?
      • 1...Rf6
        • 2.Qe4#
      • 1...Ke6!
  • Keys
    • 1.Kg1!
      • 1...Ke6
        • 2.Qxg6#
      • 1...Kf6
        • 2.Qxg6#
      • 1...Re6
        • 2.Qg5#
      • 1...Rf6
        • 2.Qg4#
      • 1...Rd7
        • 2.Qxg6#
      • 1...Rd8
        • 2.Qxg6#

Anticipated by 158921(1924)

This anticipates 108430(1952-1953), 27770(1962)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK::QAR2(C)
    • R(d);SBLOCK::QAB1(C)
  • Tries
    • Try
      • S(B);N_SPINQ(C)
      • Vars
        • K(b);N_SPINB(a),N_SPINR(e),S_FLIGHT::QAR2(C),XR(e)
        • R(d);SBLOCK::QAR2(C)
        • R(d);N_GUARD::QAB1(C),XR(e)
      • Refutation
        • R(d);
    • Try
      • R(G);CHECK
      • Vars
        • R(d);N_SPINR(e),P_SPINR(d)::QAB1(C)
      • Refutation
        • K(b);N_SPINB(a),N_SPINR(e),S_FLIGHT
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • K(b);N_SPINB(a),N_SPINR(e),S_FLIGHT::QAR2(C),XR(e)
      • K(b);N_SPINB(a),N_SPINR(e),P-FLIGHT::QAR1(C),XR(e)
      • R(d);SBLOCK::QAR1(C)
      • R(d);SBLOCK::QAB1(C)
      • R(d);N_GUARD::QAB1(C),XR(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).