MESON Chess Problem Database

Problem Display
PID: 17404 (b2r4/b1N1R3/q1rk1P2/BB2p3/Nn1p4/8/2P3Qp/7K w - - 0 1)

Seilberger, Johann Joseph Petrus Adrianus

O Xadrez, 1946

b2r4/b1N1R3/q1rk1P2/BB2p3/Nn1p4/8/2P3Qp/7K

#2

9 + 10

136 Problem Observer 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5
      • 2.Sxb5#
    • 1...Rxc2
      • 2.Re6#
    • 1...Rc3
      • 2.Re6#
    • 1...Rc4
      • 2.Re6#
    • 1...Rc5
      • 2.Re6#
    • 1...Rb6
      • 2.Bxb4#
    • 1...Rxc7
      • 2.Bxc7#
    • 1...Rd7
      • 2.Se8#
      • 2.Re6#
    • 1...Re8
      • 2.Sxe8#
    • 1...Sa2
      • 2.Qd5#
    • 1...Sxc2
      • 2.Qd5#
    • 1...Sd3
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...e4
      • 2.Qxh2#
      • 2.Qg3#
  • Tries
    • 1.Bxb4+?
      • 1...Bc5
        • 2.Qd5#
      • 1...Rc5!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qxe5#
      • 1...Qxb5
        • 2.Sxb5#
      • 1...Rxc2
        • 2.Re6#
      • 1...Rxc7
        • 2.Bxc7#
      • 1...Rc5
        • 2.Re6#
      • 1...Rc3
        • 2.Re6#
      • 1...Rc4
        • 2.Re6#
      • 1...Rb6
        • 2.Bxb4#
      • 1...Sd3
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(e);XB(F)::S(H),XQ(e)
    • R(f);P_PINQ(C),XP(B)::R1(I)
    • R(f);P_PINQ(C)::R1(I)
    • R(f);N_GUARD,P_PINQ(C),S_CUTB(h)::B(E),XS(b)
    • R(f);OGATE,P_PINQ(C),XS(H)::B(E),XR(f)
    • R(j);N_GUARD::S(H),XR(j)
    • S(b);N_GUARD::QAR1(C)
    • S(b);N_GUARD,XP(B)::QAR1(C)
    • S(b);N_GUARD::QAR1(C),XS(b)
  • Tries
    • Try
      • B(E);CHECK,XS(b)
      • Vars
        • B(h);P_SPINB(h)::QAR1(C)
      • Refutation
        • R(f);P_PINQ(C),P_SPINR(f)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XP(d)
    • Vars
      • Q(e);XB(F)::S(H),XQ(e)
      • R(f);P_PINQ(C),XP(B)::R1(I)
      • R(f);OGATE,P_PINQ(C),XS(H)::B(E),XR(f)
      • R(f);P_PINQ(C)::R1(I)
      • R(f);N_GUARD,P_PINQ(C),S_CUTB(h)::B(E),XS(b)
      • S(b);N_GUARD::QAR1(C)
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).