MESON Chess Problem Database

Problem Display
PID: 184062 (1b6/qp4p1/2rR1PK1/pN1N2B1/R5P1/3k1P1Q/2p1n3/2n2B2 w - - 0 1)

Morra, Juan Carlos

Bulletin Ouvrier des Echecs, 1955

1b6/qp4p1/2rR1PK1/pN1N2B1/R5P1/3k1P1Q/2p1n3/2n2B2

#2

11 + 10

236 The Field 1961

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Sf4#
    • 1...Qd4
      • 2.Rxd4#
    • 1...Qa6
      • 2.Rd4#
    • 1...Qa8
      • 2.Rd4#
    • 1...Rc4
      • 2.Sb4#
    • 1...Rc5
      • 2.Rd4#
    • 1...Rb6
      • 2.Rd4#
    • 1...Rc7
      • 2.Sb6#
    • 1...b6
      • 2.Rd4#
  • Tries
    • 1.Sb6+?
      • 1...Bxd6
        • 2.Rd4#
      • 1...Rxd6!
    • 1.Sdc7+?
      • 1...Qd4
        • 2.Raxd4#
        • 2.Rdxd4#
      • 1...Rxd6!
    • 1.f4+?
      • 1...Qe3
        • 2.Rd4#
        • 2.Qxe3#
      • 1...Kd2!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Kxg7#
      • 1...gxf6
        • 2.Kxf6#
      • 1...Qe3
        • 2.Sf4#
      • 1...Qd4
        • 2.Rxd4#
      • 1...Rc4
        • 2.Sb4#
      • 1...Rc7
        • 2.Sb6#
      • 1...b6
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(g);SBLOCK::R(I)+S(G),DCHECK
    • Q(g);N_GUARD::R1(D),XQ(g)
    • Q(g);N_GUARD::R1(D)
    • R(f);SBLOCK::R(I)+S(G),DCHECK
    • R(f);S_CUTQ(g)::R1(D)
    • R(f);N_GUARD,S_CUTB(j)::R(I)+S(G)
    • P(h);S_CUTQ(g)::R1(D)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • B(j);XR(I)::R1(D)
      • Refutation
        • R(f);P_PINP(J),XR(I)
    • Try
      • S(G);CHECK
      • Refutation
        • R(f);P_PINP(J),XR(I)
    • Try
      • P(B);CHECK
      • Refutation
        • K(d);N_SPINS(c),P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+K(K),XP(i)
    • Vars
      • P(i);XP(J)::QAB(C)+K(K),XP(i)
      • Q(g);SBLOCK::R(I)+S(G),DCHECK
      • Q(g);N_GUARD::R1(D),XQ(g)
      • R(f);SBLOCK::R(I)+S(G),DCHECK
      • R(f);N_GUARD,S_CUTB(j)::R(I)+S(G)
      • P(h);S_CUTQ(g)::R1(D)
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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).