MESON Chess Problem Database

Problem Display
PID: 166840 (3b2b1/3NpB2/4npQq/1R1n1N2/P1kP4/3Rp3/2P4p/7K w - - 0 1)

Petite, Efren

Arbejder-Skak, 1955

3b2b1/3NpB2/4npQq/1R1n1N2/P1kP4/3Rp3/2P4p/7K

#2

10 + 10

15148 Sadier Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Rc5#
    • 1...Sdf4
      • 2.Sxe3#
    • 1...Sdc7
      • 2.Sb6#
    • 1...Sef4
      • 2.Sxe3#
    • 1...Sg5
      • 2.Sxe3#
    • 1...Sec7
      • 2.Sb6#
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qxd5#
      • 1...Sc3
        • 2.Qc6#
      • 1...Sb4
        • 2.Rc5#
      • 1...Sdf4
        • 2.Sxe3#
        • 2.Qc6#
      • 1...Sb6
        • 2.Qc6#
      • 1...Sdc7
        • 2.Sb6#
        • 2.Qc6#
      • 1...Sef4
        • 2.Sxe3#
      • 1...Sec7
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(d);P_SPINS(e),SBLOCK::R1(F)
    • S(d);N_GUARD,P_SPINS(e),S_CUTQ(g)::S(G),XP(b)
    • S(d);N_GUARD,P_SPINS(e),S_CUTB(i)::S(I)
    • S(e);P_SPINS(d),S_CUTQ(g)::S(G),XP(b)
    • S(e);P_SPINS(d),S_CUTB(i)::S(I)
  • Actual
    • Q(H);
    • Threat
      • QAB1(H),XS(d)
    • Vars
      • S(d);OGATE,P_SPINS(e)::QAR2(H)
      • S(d);P_SPINS(e),SBLOCK::R1(F)
      • S(e);P_SPINS(d),S_CUTQ(g)::S(G),XP(b)
      • S(e);P_SPINS(d),S_CUTB(i)::S(I)
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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).