MESON Chess Problem Database

Problem Display
PID: 276183 (4r3/4B1QB/8/3p1n2/rN2kp1R/p2pp3/Kn1P1PP1/2b2q2 w - - 0 1)

Doukhan, Gerard

Die Schwalbe, 2024

4r3/4B1QB/8/3p1n2/rN2kp1R/p2pp3/Kn1P1PP1/2b2q2

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.f3#
    • 1...Qg1
      • 2.f3#
    • 1...Qh1
      • 2.f3#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Rxf4#
      • 1...Re5
        • 2.Qxe5#
      • 1...Qxf2!
    • 1.dxe3?
      • threat
        • 2.Rxf4#
        • 2.Qd4#
      • 1...Qxg2
        • 2.Rxf4#
      • 1...Qxf2
        • 2.Qd4#
      • 1...Rxb4
        • 2.Rxf4#
      • 1...d4
        • 2.Rxf4#
        • 2.Qxd4#
      • 1...Bxe3!
    • 1.fxe3?
      • threat
        • 2.Qd4#
      • 1...Qxg2
        • 2.Rxf4#
      • 1...d4
        • 2.Qxd4#
      • 1...Rxb4!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qe5#
      • 1...Qxg2
        • 2.Qxg2#
      • 1...Rxe7
        • 2.Qxe7#
      • 1...Sc4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(b);N_GUARD::P(C)
  • Tries
    • Try
      • B(G);
      • Threat
        • R1(F),XP(i)
      • Vars
        • R(l);N_GUARD::QAR1(H),XR(l)
      • Refutation
        • Q(b);XP(C)
    • Try
      • P(B);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XP(D)::R1(F),XP(i)
        • Q(b);XP(C)::QAR1(H)
        • R(g);XS(E)::R1(F),XP(i)
      • Refutation
        • B(a);XP(B)
    • Try
      • P(C);XP(f)
      • Threat
        • QAR1(H)
      • Vars
        • Q(b);N_GUARD,XP(D)::R1(F),XP(i)
        • P(j);::QAR1(H),XP(j)
      • Refutation
        • R(g);XS(E)
  • Actual
    • S(E);
    • Threat
      • QAR1(H)
    • Vars
      • Q(b);OGATE,XP(D)::QAB(H),XQ(b)
      • R(l);OGATE,XB(G)::QAR(H),XR(l)
      • S(c);S_CUTR(g)::QAR1(H)
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).