MESON Chess Problem Database

Problem Display
PID: 168294 (4r3/3B4/1n1bQ3/1p1ppP2/3N4/1P1k4/1Pp3bR/2K1R1B1 w - - 0 1)

Petite, Efren

5th HM., Belik-65 JT, 2001

4r3/3B4/1n1bQ3/1p1ppP2/3N4/1P1k4/1Pp3bR/2K1R1B1

#2

10 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Rd2#
    • 1...Bh1
      • 2.Rd2#
    • 1...Bf3
      • 2.Rd2#
    • 1...Bh3
      • 2.Rd2#
      • 2.Rxh3#
    • 1...Be4
      • 2.Rd2#
    • 1...Sa4
      • 2.Bxb5#
    • 1...Sa8
      • 2.Bxb5#
    • 1...Sc8
      • 2.Bxb5#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Re3#
      • 1...Bxf3
        • 2.Rd2#
      • 1...Bc5
        • 2.Sxe5#
      • 1...Sc4
        • 2.Qxd5#
      • 1...d4!
    • 1.Rxg2?
      • threat
        • 2.Rd2#
        • 2.Rg3#
      • 1...exd4
        • 2.Rd2#
      • 1...Rg8
        • 2.Rd2#
      • 1...Bb4
        • 2.Rg3#
      • 1...e4
        • 2.Rd2#
      • 1...Sc4!
    • 1.Rh3+?
      • 1...Bf3
        • 2.Rxf3#
      • 1...Bxh3!
    • 1.Qh6?
      • threat
        • 2.Qd2#
        • 2.Qe3#
      • 1...exd4
        • 2.Qd2#
      • 1...Bb4
        • 2.Qe3#
      • 1...Sc4!
  • Keys
    • 1.Qxd5!
      • threat
        • 2.Re3#
      • 1...Bxd5
        • 2.Rd2#
      • 1...Sxd5
        • 2.Bxb5#
      • 1...exd4
        • 2.Qxd4#
      • 1...Sc4
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • B(b);OGATE::R1(E)
    • S(g);N_GUARD::B(J),XP(d)
  • Tries
    • Try
      • S(G);
      • Threat
        • R1(B)
      • Vars
        • B(b);OGATE,XS(G)::R1(E)
        • B(h);N_GUARD::S(G),XP(f)
        • S(g);N_GUARD::QAR2(I),XP(e)
      • Refutation
        • P(e);
    • Try
      • R(E);XB(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XS(G)::R1(E)
        • R(i);::R1(E)
        • B(h);::R(E)
        • P(f);::R1(E)
      • Refutation
        • S(g);
    • Try
      • R(E);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::R(E),XB(b)
      • Refutation
        • B(b);XR(E)
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XS(G)::QAR1(I)
        • B(h);::QAR1(I)
      • Refutation
        • S(g);
  • Actual
    • Q(I);XP(e)
    • Threat
      • R1(B)
    • Vars
      • B(b);OGATE,XQ(I)::R1(E)
      • S(g);N_GUARD,XQ(I)::B(J),XP(d)
      • P(f);OGATE,P_SPINP(f),XS(G)::QAR1(I),XP(f)
      • S(g);N_GUARD::QAR(I)+S(G)
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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).