MESON Chess Problem Database

Problem Display
PID: 239998 (2b5/4Q3/rp1NP3/1PPkP3/3r4/8/3n3b/2RNR2K w - - 0 1)

Petite, Efren

Sinfonie Scacchistiche, 1981

2b5/4Q3/rp1NP3/1PPkP3/3r4/8/3n3b/2RNR2K

#2

10 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5
      • 2.Se3#
    • 1...Bxe6
      • 2.Qb7#
    • 1...bxc5
      • 2.Sc3#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Qd6#
      • 1...Bxe5
        • 2.Rxe5#
      • 1...Sxc4
        • 2.Sc3#
      • 1...Se4
        • 2.Sde3#
      • 1...bxc5!
    • 1.Qb7+?
      • 1...Kxe6
        • 2.Qf7#
      • 1...Bxb7!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Qd6#
      • 1...Bxe5
        • 2.Rxe5#
      • 1...bxc5
        • 2.Rxc5#
      • 1...Sc4
        • 2.Sc3#
      • 1...Se4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(b);SBLOCK,XP(G)::S(B)
    • B(g);N_GUARD,SBLOCK,XP(I)::QAB(J)
    • P(f);SBLOCK,XP(F)::S(B)
  • Tries
    • Try
      • S(H);
      • Threat
        • QAR1(J)
      • Vars
        • B(b);OGATE,XP(G)::R1(C),XB(b)
        • S(a);SBLOCK,XS(H)::S(B)
        • S(a);SBLOCK::S(B)
      • Refutation
        • P(f);XP(F)
    • Try
      • Q(J);CHECK
      • Vars
        • K(d);OGATEB,S_FLIGHT,XP(I)::QAB1(J)
      • Refutation
        • B(g);XQ(J)
  • Actual
    • S(H);
    • Threat
      • QAR1(J)
    • Vars
      • B(b);OGATE,XP(G)::R1(C),XB(b)
      • P(f);OGATE,XP(F)::R1(A),XP(f)
      • S(a);SBLOCK::S(B)
HTML5 logo

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).