MESON Chess Problem Database

Problem Display
PID: 109105 (3B4/3p4/3k3K/1P1rN1p1/2Bb2P1/P2N4/3Q4/8 w - - 0 1)

Otten, Henry

Checkmate, 1903

3B4/3p4/3k3K/1P1rN1p1/2Bb2P1/P2N4/3Q4/8

#2

9 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Sf7#
  • Tries
    • 1.Qb4+?
      • 1...Ke6
        • 2.Qe7#
      • 1...Rc5
        • 2.Sf7#
      • 1...Bc5!
    • 1.Qg2?
      • threat
        • 2.Qxd5#
      • 1...Ke6
        • 2.Qxd5#
      • 1...Rxb5
        • 2.Sf7#
      • 1...Rc5
        • 2.Sf7#
      • 1...Rxe5!
  • Keys
    • 1.Sc5!
      • 1...Kxc5
        • 2.Qb4#
      • 1...Kxe5
        • 2.Qh2#
      • 1...Rxc5
        • 2.Sf7#
      • 1...Rxe5
        • 2.Sb7#
      • 1...Bxc5
        • 2.Qxd5#
      • 1...Bxe5
        • 2.Qxd5#
      • 1...Ba1
        • 2.Qxd5#
      • 1...Bg1
        • 2.Qxd5#
      • 1...Bb2
        • 2.Qxd5#
      • 1...Bf2
        • 2.Qxd5#
      • 1...Bc3
        • 2.Qxd5#
      • 1...Be3
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • R(b);::S(G)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);OGATE,P-FLIGHT,P_SPINR(b)::QAR1(A)
        • R(b);P_SPINR(b)::S(G)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XR(b)
      • Vars
        • K(d);P-FLIGHT,P_SPINR(b)::QAB1(A),XR(b)
        • R(b);XP(F)::S(G)
        • R(b);::S(G)
      • Refutation
        • R(b);XS(G)
  • Actual
    • S(C);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • K(d);OGATEB,S_FLIGHT,XS(G)::QAB(A)
      • R(b);P_SPINB(a),SBLOCK,XS(C)::S(G)
      • R(b);P_SPINB(a),SBLOCK,XS(G)::S(C)
      • B(a);OGATE,P_SPINR(b),XS(C)::QAR1(A),XR(b)
      • B(a);OGATE,P_SPINR(b),XS(G)::QAR1(A),XR(b)
      • B(a);OGATE,P_SPINR(b)::QAR1(A),XR(b)
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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).