MESON Chess Problem Database

Problem Display
PID: 180325 (B7/8/3R2p1/4pPn1/4pkPQ/6n1/1N3P1b/K5N1 w - - 0 1)

Lider, Valentin Viktorovich

Sinfonie Scacchistiche, 1977

B7/8/3R2p1/4pPn1/4pkPQ/6n1/1N3P1b/K5N1

#2

9 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg1
      • 2.Qxg3#
    • 1...Sf3
      • 2.Sh3#
    • 1...e3
      • 2.Sd3#
  • Tries
    • 1.Rd3?
      • 1...Bxg1
        • 2.Qxg3#
        • 2.fxg3#
      • 1...Sxf5
        • 2.Se2#
      • 1...exd3
        • 2.Sxd3#
      • 1...Sf1
        • 2.Se2#
      • 1...Sh1
        • 2.Se2#
      • 1...Se2
        • 2.Sxe2#
      • 1...Sh5
        • 2.Se2#
      • 1...Sf3
        • 2.Sh3#
      • 1...Sh3
        • 2.Sxh3#
      • 1...Se6
        • 2.Sh3#
      • 1...Sf7
        • 2.Sh3#
      • 1...Sh7
        • 2.Sh3#
      • 1...e3
        • 2.fxe3#
      • 1...gxf5!
    • 1.Rd4?
      • threat
        • 2.Sd3#
      • 1...Bxg1
        • 2.Qxg3#
      • 1...exd4!
    • 1.fxg3+?
      • 1...Ke3
        • 2.Sd1#
      • 1...Bxg3!
  • Keys
    • 1.Rf6!
      • 1...Bxg1
        • 2.Qxg3#
      • 1...Sxf5
        • 2.gxf5#
      • 1...gxf5
        • 2.gxf5#
      • 1...Sf1
        • 2.fxg6#
      • 1...Sh1
        • 2.fxg6#
      • 1...Se2
        • 2.fxg6#
      • 1...Sh5
        • 2.gxh5#
      • 1...Sf3
        • 2.Sh3#
      • 1...Sh3
        • 2.g5#
      • 1...Se6
        • 2.g5#
      • 1...Sf7
        • 2.g5#
      • 1...Sh7
        • 2.g5#
      • 1...e3
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD,XS(B)::QAB1(F),XS(b)
    • S(f);N_GUARD,SBLOCK::S(B)
    • P(c);N_GUARD::S(C)
  • Tries
    • Try
      • R(H);
      • Vars
        • S(b);N_GUARD,XP(G)::S(B)
        • P(c);XR(H)::S(C),XP(c)
        • S(b);N_GUARD::S(B)
        • S(b);N_GUARD::S(B),XS(b)
        • S(f);N_GUARD::S(B)
        • S(f);N_GUARD::S(B),XS(f)
        • P(c);OGATE::P(D),XP(c)
      • Refutation
        • P(g);XP(G)
    • Try
      • R(H);P_PINP(c)
      • Threat
        • S(C)
      • Vars
        • B(a);N_GUARD,XS(B)::QAB1(F),XS(b)
      • Refutation
        • P(e);N_SPINP(c),XR(H)
    • Try
      • P(D);CHECK,XS(b)
      • Vars
        • K(d);S_FLIGHT::S(C)
      • Refutation
        • B(a);XP(D)
  • Actual
    • R(H);
    • Vars
      • B(a);N_GUARD,XS(B)::QAB1(F),XS(b)
      • S(b);OGATE,P_SPINS(b),XP(G)::QAR(F)+P(E),XS(b)
      • P(g);OGATE,P_SPINP(g),XP(G)::QAR(F)+P(E),XP(g)
      • S(b);N_GUARD::R(H)+P(G),XP(g)
      • S(b);OGATE::QAR(F)+P(E),XS(b)
      • S(f);N_GUARD,SBLOCK::S(B)
      • S(f);OGATE::QAR(F)+P(E)
      • P(c);N_GUARD::S(C)
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).