MESON Chess Problem Database

Problem Display
PID: 254976 (8/1qp3PB/6R1/4PN2/2pB1Q2/3k1PPK/N1rp3R/4r3 w - - 0 1)

Hirschenson, Aaron

Zadachi i Etyudi, 2006

8/1qp3PB/6R1/4PN2/2pB1Q2/3k1PPK/N1rp3R/4r3

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf3
      • 2.Sb4#
    • 1...Qe4
      • 2.Sb4#
    • 1...Qd5
      • 2.Sb4#
    • 1...Qa6
      • 2.Sb4#
    • 1...Qc6
      • 2.Sb4#
    • 1...Qa8
      • 2.Sb4#
    • 1...Qc8
      • 2.Sb4#
    • 1...Qb4
      • 2.Sxb4#
    • 1...Qa7
      • 2.Sb4#
    • 1...Ra1
      • 2.Qe3#
    • 1...Rb1
      • 2.Qe3#
    • 1...Rec1
      • 2.Qe3#
    • 1...Rd1
      • 2.Qe3#
    • 1...Rf1
      • 2.Qe3#
    • 1...Rg1
      • 2.Qe3#
    • 1...Rh1
      • 2.Qe3#
    • 1...Re3
      • 2.Qxe3#
    • 1...Rcc1
      • 2.Rxd2#
      • 2.Qxd2#
    • 1...Rc3
      • 2.Rxd2#
      • 2.Qxd2#
  • Tries
    • 1.Rc6?
      • threat
        • 2.Se3#
      • 1...Qxc6
        • 2.Sb4#
      • 1...Qc8
        • 2.Sb4#
      • 1...Re3
        • 2.Sxe3#
        • 2.Qxe3#
      • 1...Re4
        • 2.Qxe4#
      • 1...Rxe5!
    • 1.Qe4+?
      • 1...Qxe4
        • 2.Sb4#
      • 1...Rxe4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Rc6#
      • 1...Qc8+
        • 2.Re6#
      • 1...Qxf3
        • 2.Sb4#
      • 1...Rxe3
        • 2.Qxe3#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qd5
        • 2.Sb4#
      • 1...Qc6
        • 2.Sb4#
        • 2.Rxc6#
      • 1...c6
        • 2.Rg4#
        • 2.Rg5#
        • 2.Rxc6#
        • 2.Rd6#
        • 2.Re6#
        • 2.Rf6#
        • 2.Rh6#
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 12
  • Sets
    • Q(f);N_GUARD,P_PINP(D),XP(C)::S(A)
    • Q(f);N_GUARD::S(A)
    • Q(f);N_GUARD,P_PINS(I)::S(A)
    • Q(f);N_GUARD::S(A),XQ(f)
    • R(a);N_GUARD::QAR1(G)
    • R(a);N_GUARD,P_PINR(B)::QAR1(G)
    • R(a);N_GUARD::QAR1(G),XR(a)
  • Tries
    • Try
      • R(J);
      • Threat
        • B(L)+S(I)
      • Vars
        • Q(f);N_GUARD,XR(J)::S(A)
        • Q(f);N_GUARD,P_PINS(I)::S(A)
        • R(a);N_GUARD::QAB1(G),XR(a)
      • Refutation
        • R(a);XP(H)
    • Try
      • Q(G);CHECK
      • Vars
        • Q(f);XQ(G)::S(A)
      • Refutation
        • R(a);XQ(G)
  • Actual
    • S(I);
    • Threat
      • B(L)+R(J)
    • Vars
      • Q(f);CHECK,N_GUARD::B(L)+R(J)
      • Q(f);N_GUARD,P_PINP(D),XP(C)::S(A)
      • R(a);OGATE,XS(I)::QAR1(G),XR(a)
      • Q(f);N_GUARD::QAB1(G),XQ(f)
      • Q(f);N_GUARD::S(A)
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).