MESON Chess Problem Database

Problem Display
PID: 19139 (8/5Kp1/3p2Pp/1PpkqR1Q/1p4P1/2p3N1/N1PbB1p1/3R2B1 w - - 0 1)

Koers, Johann

Richter, Kurt

Schachwart, 1932

8/5Kp1/3p2Pp/1PpkqR1Q/1p4P1/2p3N1/N1PbB1p1/3R2B1

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5+
      • 2.Qxf5#
    • 1...b3
      • 2.Sxc3#
    • 1...c4
      • 2.Sxb4#
      • 2.Bf3#
  • Tries
    • 1.Sc1?
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...c4
        • 2.Bf3#
      • 1...b3!
    • 1.Se4?
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Kxe4
        • 2.Bf3#
      • 1...b3
        • 2.Saxc3#
        • 2.Sexc3#
      • 1...c4!
  • Keys
    • 1.Sh1!
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Ke4
        • 2.Bf3#
      • 1...gxh1Q
        • 2.Qxh1#
      • 1...gxh1S
        • 2.Qxh1#
      • 1...gxh1B
        • 2.Qxh1#
      • 1...gxh1R
        • 2.Qxh1#
      • 1...b3
        • 2.Sxc3#
      • 1...c4
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(g);CHECK,OGATE,XR(I)::QAR2(J),XQ(g)
    • P(d);N_GUARD::S(C),XP(c)
  • Tries
    • Try
      • S(C);
      • Vars
        • Q(g);CHECK,OGATE,XR(I)::QAR2(J),XQ(g)
        • P(e);SBLOCK::B(E)
      • Refutation
        • P(d);
    • Try
      • S(F);
      • Vars
        • Q(g);CHECK,OGATE,XR(I)::QAR2(J),XQ(g)
        • K(f);N_SPINB(a),N_SPINQ(g),OGATEB,S_FLIGHT,XS(F)::B(E)
      • Refutation
        • P(e);
  • Actual
    • S(F);
    • Vars
      • Q(g);CHECK,OGATE,XR(I)::QAR2(J),XQ(g)
      • K(f);N_SPINB(a),N_SPINQ(g),S_FLIGHT::B(E)
      • P(b);OGATE,XS(F)::QAB(J),XQ(b)
      • P(b);OGATE,XS(F)::QAB(J),XS(b)
      • P(b);OGATE,XS(F)::QAB(J),XB(b)
      • P(b);OGATE,XS(F)::QAB(J),XR(b)
      • P(d);N_GUARD::S(C),XP(c)
      • P(e);SBLOCK::B(E)
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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).