MESON Chess Problem Database

Problem Display
PID: 263175 (4R3/1BBnb3/8/rp1P2Pp/2Nkp3/PpRPp2N/1P6/2KQ3b w - - 0 1)

Lilu, Zhorzh Aleksandrovich

SuperProblem, 2021

4R3/1BBnb3/8/rp1P2Pp/2Nkp3/PpRPp2N/1P6/2KQ3b

#2

13 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.d4#
    • 1...Bc5
      • 2.dxe4#
    • 1...Sc5
      • 2.Be5#
    • 1...bxc4
      • 2.Rxc4#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sf5#
      • 1...Ke5
        • 2.d4#
      • 1...Bxd6
        • 2.dxe4#
      • 1...exd3!
    • 1.Be5+?
      • 1...Kc5
        • 2.Rc8#
        • 2.d4#
      • 1...Sxe5!
    • 1.Qe2?
      • threat
        • 2.Qxe3#
      • 1...Kc5
        • 2.Qxe3#
      • 1...bxc4
        • 2.Rxc4#
      • 1...Bxg5!
    • 1.dxe4+?
      • 1...Kc5
        • 2.Sxe3#
        • 2.Sxa5#
        • 2.Se5#
        • 2.Sb6#
        • 2.Sd6#
      • 1...Kxe4!
  • Keys
    • 1.Sxe3!
      • threat
        • 2.Sf5#
      • 1...Kxe3
        • 2.d4#
      • 1...Bxg5
        • 2.dxe4#
      • 1...exd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • K(d);OGATE,S_FLIGHT::P(F)
    • B(j);SBLOCK::QAR(B)+P(F),XP(e)
    • S(i);N_GUARD,SBLOCK::B(L)
    • P(g);OGATE,XS(H)::R1(E),XP(g)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • K(d);OGATE,P_SPINB(j),S_FLIGHT::P(F)
        • B(j);XS(H)::QAR(B)+P(F),XP(e)
      • Refutation
        • P(e);P_SPINP(e),XP(F)
    • Try
      • B(L);CHECK
      • Refutation
        • S(i);XB(L)
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(c)
      • Vars
        • K(d);S_FLIGHT::QAB(B),XP(c)
        • P(g);OGATE,XS(H)::R1(E),XP(g)
      • Refutation
        • B(j);XP(J)
    • Try
      • P(F);CHECK,XP(e)
      • Refutation
        • K(d);P-FLIGHT,P_SPINB(j),XP(F)
  • Actual
    • S(H);XP(c)
    • Threat
      • S(H)
    • Vars
      • K(d);OGATE,S_FLIGHT,XS(H)::R(E)+P(F)
      • B(j);P_PINS(H),XP(J)::QAR(B)+P(F),XP(e)
      • P(e);OGATE,P_SPINP(e),XP(F)::QAR1(B),XP(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).