MESON Chess Problem Database

Problem Display
PID: 157974 (3N2Kn/4B3/p3B1pb/4k1p1/3NP1p1/r1qpR1P1/p1R2Pp1/3Q4 w - - 0 1)

Agapov, Igor Alexeyevich

Permyakov, Evgeni Nikolaevich

1st HM., Shakhmatnaya kompozitsiya, 2015

3N2Kn/4B3/p3B1pb/4k1p1/3NP1p1/r1qpR1P1/p1R2Pp1/3Q4

#2

11 + 12

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.S4c6#
      • 2.S8c6#
    • 1...Qe1
      • 2.S4c6#
      • 2.S8c6#
    • 1...Qb2
      • 2.S4c6#
      • 2.S8c6#
    • 1...Qd2
      • 2.S4c6#
      • 2.S8c6#
    • 1...Qb4
      • 2.S4c6#
      • 2.S8c6#
    • 1...Qa5
      • 2.S4c6#
      • 2.S8c6#
    • 1...Qb3
      • 2.S4c6#
      • 2.S8c6#
    • 1...Qc6
      • 2.S4xc6#
      • 2.S8xc6#
  • Tries
    • 1.Rxc3?
      • threat
        • 2.S4c6#
        • 2.S8c6#
      • 1...Kxd4
        • 2.Bf6#
      • 1...Rxc3!
    • 1.Qf3?
      • threat
        • 2.Qf6#
      • 1...Kxd4
        • 2.Qf6#
      • 1...gxf3
        • 2.Sxf3#
      • 1...Bg7!
    • 1.Qxg4?
      • threat
        • 2.Sf3#
      • 1...Kxd4
        • 2.e5#
      • 1...Qxd4
        • 2.Sc6#
      • 1...g1S!
  • Keys
    • 1.Qa1!
      • threat
        • 2.S4c6#
      • 1...Kxd4
        • 2.Sc6#
      • 1...Qxd4
        • 2.Rc5#
      • 1...Qc6
        • 2.Sf3#
        • 2.S4xc6#
        • 2.S8xc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);XQ(d)
      • Threat
        • DUALS(2)
      • Vars
        • K(g);P_SPINP(e),S_FLIGHT,XS(F)::B(I)
      • Refutation
        • R(c);XR(B)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(g);S_FLIGHT,XS(F)::QAB(A)
        • P(f);XQ(A)::S(F),XP(f)
      • Refutation
        • B(k);
    • Try
      • Q(A);XP(f)
      • Threat
        • S(F)
      • Vars
        • K(g);OGATE,S_FLIGHT,XS(F)::QAR(A)+P(G)
        • Q(d);N_GUARD,XS(F)::S(J)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Threat
      • S(F)
    • Vars
      • K(g);P_SPINQ(d),S_FLIGHT,XS(F)::S(J)
      • Q(d);OGATE,P_SPINQ(d),XS(F)::R(B)
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).