MESON Chess Problem Database

Problem Display
PID: 246666 (6q1/N7/2R5/k1r2p2/p4r2/1n1NQpB1/1P1n4/R1bK4 w - - 0 1)

Morra, Juan Carlos

El Ajedrez Espanol, 1962

6q1/N7/2R5/k1r2p2/p4r2/1n1NQpB1/1P1n4/R1bK4

#2

8 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rfc4
      • 2.Bc7#
    • 1...Rd4
      • 2.Bc7#
    • 1...Re4
      • 2.Bc7#
    • 1...Rg4
      • 2.Bc7#
    • 1...Rh4
      • 2.Bc7#
    • 1...Rc2
      • 2.Qb6#
    • 1...Rc3
      • 2.Qb6#
    • 1...Rcc4
      • 2.Qb6#
    • 1...Rd5
      • 2.Qb6#
    • 1...Re5
      • 2.Qb6#
    • 1...Sxa1
      • 2.Qxc5#
    • 1...Sd4
      • 2.b4#
  • Tries
    • 1.Rxa4+?
      • 1...Rxa4
        • 2.Bc7#
      • 1...Kxa4!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Rxa4#
      • 1...Rxd4
        • 2.Bc7#
      • 1...Sxa1
        • 2.Qxc5#
      • 1...Sxd4
        • 2.b4#
      • 1...Qc4
        • 2.Qd8#
      • 1...Rc4
        • 2.Qb6#
      • 1...Sc4
        • 2.Qc3#
      • 1...a3
        • 2.Rxa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(f);OGATE::B(F)
    • R(f);OGATE,SBLOCK::B(F)
    • R(h);OGATE::QAB1(E)
    • S(c);N_GUARD,N_SPINP(e),XR(A)::QAR2(E),XR(h)
    • S(c);OGATE::P(C)
  • Tries
    • Try
      • R(A);CHECK,XP(e)
      • Vars
        • R(f);OGATE,SBLOCK,XR(A)::B(F)
      • Refutation
        • K(g);P-FLIGHT,XR(A)
  • Actual
    • Q(E);
    • Threat
      • R1(A),XP(e)
    • Vars
      • R(f);OGATE,XQ(E)::B(F)
      • S(c);N_GUARD,N_SPINP(e),XR(A)::QAR2(E),XR(h)
      • S(c);OGATE,XQ(E)::P(C)
      • Q(j);N_GUARD::QAB(E)
      • R(h);OGATE::QAB1(E)
      • S(b);S_CUTR(f),S_CUTR(h)::QAB(E)
      • P(e);OGATEB::R(A),XP(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).