MESON Chess Problem Database

Problem Display
PID: 149998 (1b1R1R2/6n1/p1P1p3/Qb2k3/3N4/n2p4/6B1/2r1N1K1 w - - 0 1)

Aberman, Victor

Russian Chess Art, 2011

1b1R1R2/6n1/p1P1p3/Qb2k3/3N4/n2p4/6B1/2r1N1K1

#2

8 + 9

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe1+
      • 2.Qxe1#
    • 1...Rc2
      • 2.Sxd3#
    • 1...Rc4
      • 2.Sxd3#
    • 1...Rxc6
      • 2.Sxd3#
      • 2.Sxc6#
    • 1...Ba7
      • 2.Qc7#
    • 1...Bc7
      • 2.Qxc7#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qe3#
        • 2.Qf4#
      • 1...Rxe1+
        • 2.Qxe1#
      • 1...Bxc6
        • 2.Qf4#
      • 1...Sc2
        • 2.Qf4#
      • 1...Sc4
        • 2.Qf4#
      • 1...Sh5
        • 2.Qe3#
        • 2.Qg5#
      • 1...Sf5!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Sf3#
      • 1...Rxe1+
        • 2.Qxe1#
      • 1...Bxc6
        • 2.Qxb8#
      • 1...Rc4
        • 2.Sxd3#
      • 1...Bc4
        • 2.Qxb8#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Ba7
        • 2.Qd6#
      • 1...Sc4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(a);CHECK,OGATE,XS(A)::QAR(E),XR(a)
    • R(a);N_PINS(A)::S(A),XP(c)
    • B(i);N_GUARD::QAB(E)
    • B(i);N_GUARD::QAB(E),XB(i)
  • Tries
    • Try
      • Q(E);N_PINB(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,OGATE,XS(A)::QAR(E),XR(a)
        • B(d);XP(F)::QAB1(E)
        • S(b);::QAB1(E)
      • Refutation
        • S(h);
  • Actual
    • Q(E);N_PINB(d)
    • Threat
      • S(D)
    • Vars
      • R(a);CHECK,OGATE,XS(A)::QAR(E),XR(a)
      • B(d);OGATE,XP(F)::QAB(E),XB(i)
      • R(a);N_PINS(A)::S(A),XP(c)
      • B(d);OGATE::QAB(E),XB(i)
      • B(i);N_GUARD::QAB1(E),XB(i)
      • B(i);N_GUARD::QAB1(E)
      • S(b);S_CUTR(a)::QAR2(E)
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).