MESON Chess Problem Database

Problem Display
PID: 124555 (4N1N1/r3b3/p1p3R1/3k2nb/K1pP4/1R5n/BBQp3q/4r3 w - - 0 1)

Petite, Efren

Source?, 0000

4N1N1/r3b3/p1p3R1/3k2nb/K1pP4/1R5n/BBQp3q/4r3

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...cxb3
      • 2.Bxb3#
      • 2.Qxc6#
    • 1...c3
      • 2.Rb4#
  • Tries
    • 1.Re3?
      • threat
        • 2.Bxc4#
        • 2.Qxc4#
      • 1...Rxe3
        • 2.Bxc4#
      • 1...d1Q
        • 2.Bxc4#
      • 1...d1B
        • 2.Bxc4#
      • 1...Qe2
        • 2.Qf5#
      • 1...Ra1
        • 2.Qxc4#
      • 1...Rc1
        • 2.Bxc4#
      • 1...Bd1
        • 2.Bxc4#
      • 1...Be2!
    • 1.Rg3?
      • threat
        • 2.Bxc4#
      • 1...Ra1
        • 2.Qf5#
      • 1...Be2
        • 2.Qf5#
      • 1...Qe2!
    • 1.Qxc4+?
      • 1...Kxc4
        • 2.Ra3#
        • 2.Re3#
        • 2.Rf3#
        • 2.Rg3#
        • 2.Rxh3#
      • 1...Ke4!
  • Keys
    • 1.Rb7!
      • threat
        • 2.Bxc4#
      • 1...Qe2
        • 2.Sc7#
      • 1...Ra1
        • 2.Sxe7#
      • 1...Be2
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(e);OGATEB::B(A)+R(D)
  • Tries
    • Try
      • R(D);P_PINP(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XR(D)::B(A),XP(e)
        • P(b);P_PINQ(C)::B(A),XP(e)
        • Q(c);N_GUARD::QAR2(C)
        • R(a);P_PINB(A)::QAB1(C),XP(e)
        • R(a);::B(A),XP(e)
        • B(h);P_PINQ(C)::B(A),XP(e)
      • Refutation
        • B(h);
    • Try
      • R(D);P_PINP(e)
      • Threat
        • B(A),XP(e)
      • Vars
        • R(a);N_GUARD,P_PINB(A)::QAR2(C)
        • B(h);S_CUTR(a)::QAR2(C)
      • Refutation
        • Q(c);
    • Try
      • Q(C);CHECK,XP(e)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • R(D);P_PINP(e)
    • Threat
      • B(A),XP(e)
    • Vars
      • Q(c);N_GUARD::S(H)
      • R(a);N_GUARD,P_PINB(A)::S(I),XB(l)
      • B(h);S_CUTR(a)::S(I),XB(l)
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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).