MESON Chess Problem Database

Problem Display
PID: 241271 (1B2R1nb/4nQ2/2p5/2p5/p1PkPp2/3N4/2P1R3/1K1N3b w - - 0 1)

Shanshin, Valery Yurevich

Variantim, 2013

1B2R1nb/4nQ2/2p5/2p5/p1PkPp2/3N4/2P1R3/1K1N3b

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Bxe5#
    • 1...Sg6
      • 2.Rd8#
    • 1...Sf6
      • 2.Be5#
  • Tries
    • 1.S3b2?
      • threat
        • 2.c3#
      • 1...Sd5
        • 2.Rd2#
      • 1...Bxe4!
    • 1.S3f2?
      • threat
        • 2.Rd2#
        • 2.c3#
      • 1...Bxe4
        • 2.Rxe4#
      • 1...Sd5!
    • 1.Rxe7?
      • threat
        • 2.Rd7#
      • 1...Bxe4
        • 2.R2xe4#
        • 2.R7xe4#
      • 1...Be5
        • 2.Bxe5#
      • 1...Sf6
        • 2.Be5#
      • 1...Sxe7!
    • 1.Qxe7?
      • threat
        • 2.Qxc5#
      • 1...Kxc4
        • 2.Qxc5#
      • 1...Sxe7!
  • Keys
    • 1.Rd2!
      • threat
        • 2.S3f2#
      • 1...Kxe4
        • 2.Qxf4#
      • 1...Bxe4
        • 2.c3#
      • 1...Sd5
        • 2.S3b2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(i);N_GUARD::B(I),XB(i)
    • S(g);N_GUARD::R(J)
    • S(h);S_CUTB(i)::B(I)
  • Tries
    • Try
      • S(E);
      • Threat
        • P(C)
      • Vars
        • S(g);::R(D)
      • Refutation
        • B(a);P_PINP(C),XP(G)
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);OGATE,P_PINP(C),XP(G)::R1(D),XB(a)
      • Refutation
        • S(g);
    • Try
      • R(J);XS(g)
      • Threat
        • R(J)
      • Vars
        • B(i);N_GUARD::B(I),XB(i)
        • S(h);S_CUTB(i)::B(I)
      • Refutation
        • S(h);XR(J)
    • Try
      • Q(H);XS(g)
      • Threat
        • QAB1(H),XP(e)
      • Vars
        • K(c);P-FLIGHT,XP(F)::QAR1(H),XP(e)
      • Refutation
        • S(h);XQ(H)
  • Actual
    • R(D);
    • Threat
      • R(D)+S(E)
    • Vars
      • K(c);OGATEB,P-FLIGHT,P_SPINS(g),XP(G)::QAR1(H),XP(d)
      • B(a);SBLOCK,XP(G)::P(C)
      • S(g);::R(D)+S(E)
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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).