MESON Chess Problem Database

Problem Display
PID: 268956 (8/8/2Q1Rn2/1p2P1q1/1b1k4/2NbN1n1/1P3P2/R3K1B1 w Q - 0 1)

Dyachuk, Vasyl Vasilovich

Kapustin, Fedor Mikhailovich

Novitski, Petr Adrinovich

Tkachenko, Sergiy Ivanovich

3rd Prize, Problemist Ukraini, 2022

8/8/2Q1Rn2/1p2P1q1/1b1k4/2NbN1n1/1P3P2/R3K1B1

#2

10 + 7

6490 yacpdb 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3+
      • 2.fxe3#
    • 1...Bxc3+
      • 2.bxc3#
    • 1...Se4
      • 2.Qd5#
    • 1...Sg4
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sh5
      • 2.Qd5#
    • 1...Sd7
      • 2.Qd5#
    • 1...Sh7
      • 2.Qd5#
    • 1...Se8
      • 2.Qd5#
    • 1...Sg8
      • 2.Qd5#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Sc2#
      • 1...Qxe3+
        • 2.fxe3#
      • 1...Bxc3+
        • 2.bxc3#
      • 1...Bc5
        • 2.Sxb5#
      • 1...Qxe5!
    • 1.Qd6+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Bxd6!
  • Keys
    • 1.0-0-0!
      • threat
        • 2.Sxb5#
      • 1...Qxe3+
        • 2.fxe3#
      • 1...Se2+
        • 2.Sxe2#
      • 1...Qxe5
        • 2.Sc2#
      • 1...Bxc3
        • 2.bxc3#
      • 1...Sd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(f);CHECK,OGATE,XS(G)::P(E),XQ(f)
    • B(c);CHECK,OGATE,XS(F)::P(D),XB(c)
    • S(g);N_GUARD::QAR1(I)
    • S(g);N_GUARD::QAR1(I),XS(g)
  • Tries
    • Try
      • R(A);P_PINB(a)
      • Threat
        • S(G)
      • Vars
        • Q(f);CHECK,OGATE,XS(G)::P(E),XQ(f)
        • B(c);CHECK,OGATE,XS(F)::P(D),XB(c)
        • B(c);N_PINS(F)::S(F),XP(e)
      • Refutation
        • Q(f);XP(H)
    • Try
      • Q(I);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR1(I),XS(g)
      • Refutation
        • B(c);N_PINS(F),XQ(I)
  • Actual
    • K(B);0-0-0,N_SPINS(F),P_PINB(a),P_SPINS(G)
    • Threat
      • S(F),XP(e)
    • Vars
      • Q(f);CHECK,OGATE,XS(G)::P(E),XQ(f)
      • S(b);CHECK,N_GUARD::S(F),XS(b)
      • Q(f);N_PINS(G),XP(H)::S(G)
      • B(c);OGATE,XS(F)::P(D),XB(c)
      • S(g);N_GUARD::QAR1(I),XS(g)
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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).