MESON Chess Problem Database

Problem Display
PID: 168218 (2n1b2K/1N3k2/2nP3Q/3Rp1p1/5r2/1N6/B4r2/5R2 w - - 0 1)

Petite, Efren

Scacco!, 1998

2n1b2K/1N3k2/2nP3Q/3Rp1p1/5r2/1N6/B4r2/5R2

#2

8 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Sd8#
    • 1...Sd4
      • 2.Sd8#
    • 1...Sa5
      • 2.Sd8#
    • 1...S6a7
      • 2.Sd8#
    • 1...S6e7
      • 2.Sd8#
    • 1...Sb8
      • 2.Sd8#
    • 1...Sd8
      • 2.Sxd8#
  • Tries
    • 1.S3c5?
      • threat
        • 2.Qg7#
      • 1...Rh2
        • 2.Rd2#
      • 1...Rh4
        • 2.Rd4#
      • 1...Bd7!
    • 1.Qe6+?
      • 1...Kf8
        • 2.Qg8#
      • 1...Kxe6!
    • 1.Qg6+?
      • 1...Kf8
        • 2.Qg7#
        • 2.Qg8#
      • 1...Kxg6!
  • Keys
    • 1.Rxe5!
      • threat
        • 2.Qg7#
      • 1...Sxe5
        • 2.Sd8#
      • 1...Rh2
        • 2.Sd2#
      • 1...Rh4
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(e);N_GUARD::S(G)
    • S(e);N_GUARD::S(G),XS(e)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(F)
      • Vars
        • R(a);P_PINQ(F),P_SPINR(b)::B(B)+R(D)
        • R(b);P_PINQ(F),P_SPINR(a)::B(B)+R(D)
      • Refutation
        • B(h);
    • Try
      • Q(F);CHECK
      • Vars
        • K(f);OGATE,P-FLIGHT::QAR1(F)
      • Refutation
        • K(f);S_FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(f);S_FLIGHT,XQ(F)
  • Actual
    • R(D);XP(c)
    • Threat
      • QAR1(F)
    • Vars
      • S(e);N_GUARD,XR(D)::S(G)
      • R(a);P_PINQ(F),P_SPINR(b)::B(B)+S(C)
      • R(b);P_PINQ(F),P_SPINR(a)::B(B)+S(C)
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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).