MESON Chess Problem Database

Problem Display
PID: 125363 (b1qb4/3Q1p1B/r2R1P1B/4NP2/1r2k1K1/3N1p2/1p6/3R2n1 w - - 0 1)

Petite, Efren

Source?, 1989

b1qb4/3Q1p1B/r2R1P1B/4NP2/1r2k1K1/3N1p2/1p6/3R2n1

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Rd4#
    • 1...Rd4
      • 2.Rxd4#
    • 1...Rb5
      • 2.Rd4#
    • 1...Rbb6
      • 2.Rd4#
    • 1...Rb7
      • 2.Rd4#
    • 1...Rb8
      • 2.Rd4#
    • 1...Sh3
      • 2.Re1#
  • Tries
    • 1.Re6?
      • threat
        • 2.Sf2#
      • 1...Rxe6
        • 2.fxe6#
      • 1...fxe6
        • 2.fxe6#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Bb6
        • 2.Sxf7#
      • 1...Sh3
        • 2.Re1#
      • 1...f2
        • 2.Sxf2#
      • 1...Qc2!
    • 1.Qe6?
      • threat
        • 2.Sf2#
      • 1...Qxe6
        • 2.fxe6#
      • 1...fxe6
        • 2.fxe6#
      • 1...Qc2
        • 2.Sxf7#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Sh3
        • 2.Re1#
      • 1...f2
        • 2.Sxf2#
      • 1...Bb6!
  • Keys
    • 1.Sxf7!
      • threat
        • 2.Sf2#
      • 1...Qc2
        • 2.Qe6#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Bb6
        • 2.Re6#
      • 1...Sh3
        • 2.Re1#
      • 1...f2
        • 2.Sxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(d);N_GUARD::R1(F)
    • R(d);N_GUARD::R1(F),XR(d)
    • S(a);N_GUARD::R(A)
  • Tries
    • Try
      • R(F);
      • Threat
        • S(B)
      • Vars
        • R(f);OGATE,XR(F)::B(J)+P(E),XR(f)
        • P(g);OGATE,XR(F)::B(J)+P(E),XP(g)
        • Q(i);N_GUARD::S(B),XQ(i)
        • B(j);S_CUTR(f)::R(F)+S(D),XP(g)
        • S(a);N_GUARD::R(A)
        • P(c);::S(B),XP(c)
      • Refutation
        • Q(i);
    • Try
      • Q(I);
      • Threat
        • S(B)
      • Vars
        • Q(i);OGATE,P_PINP(E),XQ(I)::B(J)+P(E),XQ(i)
        • P(g);OGATE,XQ(I)::B(J)+P(E),XP(g)
        • Q(i);N_GUARD::QAR(I)+S(D),XP(g)
        • Q(i);N_GUARD::S(B),XQ(i)
        • S(a);N_GUARD::R(A)
        • P(c);::S(B),XP(c)
      • Refutation
        • B(j);
  • Actual
    • S(D);XP(g)
    • Threat
      • S(B)
    • Vars
      • Q(i);N_GUARD::QAR2(I)
      • Q(i);N_GUARD::S(B),XQ(i)
      • B(j);S_CUTR(f)::R(F)
      • S(a);N_GUARD::R(A)
      • P(c);::S(B),XP(c)
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).