MESON Chess Problem Database

Problem Display
PID: 178700 (3b4/1n1R1p2/B1p2N2/1r3Q1K/1rkB2p1/PN1p1nR1/P7/3b4 w - - 0 1)

Shanshin, Valery Yurevich

Phenix, 2018

3b4/1n1R1p2/B1p2N2/1r3Q1K/1rkB2p1/PN1p1nR1/P7/3b4

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Sd2#
    • 1...Sg1
      • 2.Sd2#
    • 1...Sd2
      • 2.Sxd2#
    • 1...Sh2
      • 2.Sd2#
    • 1...Sh4
      • 2.Sd2#
    • 1...Se5
      • 2.Sd2#
    • 1...Sg5
      • 2.Sd2#
      • 2.Qxd3#
    • 1...Sa5
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sd6
      • 2.Qc5#
    • 1...c5
      • 2.Qd5#
  • Tries
    • 1.Sa5+?
      • 1...Sxa5
        • 2.Qc5#
      • 1...Bxa5!
    • 1.Sxg4?
      • threat
        • 2.Se3#
      • 1...Bg5
        • 2.Qxf7#
      • 1...Se1
        • 2.Sd2#
      • 1...Sg1
        • 2.Sd2#
      • 1...Sd2
        • 2.Sxd2#
      • 1...Sh2
        • 2.Sd2#
      • 1...Sh4
        • 2.Sd2#
      • 1...Se5
        • 2.Sd2#
      • 1...Sg5
        • 2.Sd2#
        • 2.Qxd3#
      • 1...Sxd4!
    • 1.Bxb5+?
      • 1...cxb5
        • 2.Qd5#
      • 1...Rxb5!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Se3#
      • 1...Sxd4
        • 2.Qxd3#
      • 1...cxd5
        • 2.Qxd5#
      • 1...Bg5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • S(c);N_GUARD::S(C)
    • S(c);N_GUARD::S(C),XS(c)
    • S(c);N_GUARD,N_PINQ(F)::S(C)
    • S(i);N_GUARD::QAR1(F)
    • S(i);N_GUARD,N_PINQ(F)::QAR1(F),XS(i)
    • P(h);N_GUARD,N_PINQ(F)::QAB1(F)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(i);XS(C)::QAR1(F)
      • Refutation
        • B(k);XS(C)
    • Try
      • S(I);XP(f)
      • Threat
        • S(I)
      • Vars
        • B(k);N_PINQ(F)::QAB(F),XP(j)
        • S(c);N_GUARD,P_PINS(I)::S(C)
        • S(c);N_GUARD,P_PINS(I)::S(C),XS(c)
        • S(c);N_GUARD,N_PINQ(F),P_PINS(I)::S(C)
      • Refutation
        • S(c);P_PINS(I),XB(E)
    • Try
      • B(H);CHECK,N_SPINQ(F),XR(g)
      • Vars
        • P(h);XB(H)::QAB1(F)
      • Refutation
        • R(d);P_PINQ(F),XB(H)
  • Actual
    • S(I);N_SPINQ(F)
    • Threat
      • S(I)
    • Vars
      • S(c);XB(E)::QAB1(F),XP(b)
      • P(h);OGATE,XS(I)::QAB1(F),XP(h)
      • B(k);N_GUARD::S(I)
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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).