MESON Chess Problem Database

Problem Display
PID: 267721 (3N2b1/2r1R1P1/Q3p1NK/3p1k1n/3Pr1pB/5nP1/8/1B3R2 w - - 0 1)

Gavriliv, Evgeni M

Problemist Ukraini, 2022

3N2b1/2r1R1P1/Q3p1NK/3p1k1n/3Pr1pB/5nP1/8/1B3R2

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe7
      • 2.Sxe7#
    • 1...Bh7
      • 2.Qxe6#
    • 1...e5
      • 2.Rxe5#
  • Tries
    • 1.Rxf3+?
      • 1...Sf4
        • 2.Rxf4#
      • 1...gxf3!
    • 1.Rf7+?
      • 1...Rxf7
        • 2.Qxe6#
      • 1...Sf6
        • 2.Rxf6#
        • 2.Qxe6#
      • 1...Bxf7!
    • 1.Qd6?
      • threat
        • 2.Qe5#
      • 1...Sf4
        • 2.Qxf4#
      • 1...e5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Rc2!
  • Keys
    • 1.Rxe6!
      • threat
        • 2.Re5#
      • 1...Bxe6
        • 2.Qxe6#
      • 1...Rc2
        • 2.Se7#
      • 1...Re7
        • 2.Sxe7#
      • 1...Sf4
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(h);XR(I)::S(G),XR(h)
    • B(i);N_GUARD::QAB1(F),XP(g)
    • P(g);OGATE::R1(I),XP(g)
  • Tries
    • Try
      • R(B);CHECK,XS(a)
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::R1(B),XS(f)
      • Refutation
        • P(c);XR(B)
    • Try
      • R(I);CHECK
      • Vars
        • R(h);XR(I)::QAB1(F),XP(g)
      • Refutation
        • B(i);XR(I)
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • S(f);N_GUARD,N_SPINS(a)::QAR1(F),XS(f)
      • Refutation
        • R(h);N_SPINR(b)
  • Actual
    • R(I);XP(g)
    • Threat
      • R1(I)
    • Vars
      • B(i);OGATE,XR(I)::QAB1(F),XB(i)
      • R(h);N_GUARD,N_SPINR(b)::S(G)
      • R(h);N_GUARD::S(G),XR(h)
      • S(f);N_GUARD,N_SPINS(a)::R1(I)
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).