MESON Chess Problem Database

Problem Display
PID: 266374 (5N2/qn2Qnrp/r3pP2/pbpBk1p1/2P5/3R2P1/5R1p/7K w - - 0 1)

Knuppert, Hugo

Die Schwalbe, 1973

5N2/qn2Qnrp/r3pP2/pbpBk1p1/2P5/3R2P1/5R1p/7K

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Sd7#
    • 1...Bxc4
      • 2.Sd7#
    • 1...Bc6
      • 2.Qxe6#
    • 1...Bd7
      • 2.Sxd7#
    • 1...Sbd6
      • 2.Qxe6#
    • 1...Sfd6
      • 2.Qxe6#
  • Tries
    • 1.Sxe6?
      • threat
        • 2.Re3#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Sbd6
        • 2.Sc7#
      • 1...Sfd6
        • 2.Sxg7#
      • 1...Bxc4!
    • 1.Bg2?
      • threat
        • 2.Rd5#
      • 1...Bxc4
        • 2.Sd7#
      • 1...Bc6
        • 2.Qxe6#
      • 1...Rd6!
    • 1.Rf4?
      • threat
        • 2.Re3#
      • 1...Bxc4
        • 2.Sd7#
      • 1...Sbd6
        • 2.Qxe6#
      • 1...Sfd6
        • 2.Qxe6#
      • 1...gxf4!
    • 1.g4?
      • threat
        • 2.Rf5#
      • 1...Sbd6
        • 2.Qxe6#
      • 1...Sfd6
        • 2.Qxe6#
      • 1...Sh6!
  • Keys
    • 1.Bxe6!
      • threat
        • 2.Re2#
      • 1...Bc6+
        • 2.Bd5#
      • 1...Ke4
        • 2.Bf5#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Sbd6
        • 2.Bd7#
      • 1...Sfd6
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(g);S_CUTB(c)::S(I)
    • B(c);N_GUARD,XP(E)::S(I)
    • B(c);P_PINB(F),S_CUTR(g)::QAR1(H),XP(h)
    • B(c);N_GUARD::S(I),XB(c)
    • S(j);S_CUTR(g)::QAR1(H),XP(h)
    • S(k);S_CUTR(g)::QAR1(H),XP(h)
  • Tries
    • Try
      • S(I);XP(h)
      • Threat
        • R(C)
      • Vars
        • R(g);OGATE,P_SPINR(g),XS(I)::QAR1(H),XR(g)
        • S(j);S_CUTR(g)::QAR(H)+S(I)
        • S(k);S_CUTR(g)::QAR(H)+S(I),XR(l)
      • Refutation
        • B(c);XP(E)
    • Try
      • B(F);
      • Threat
        • R1(C)
      • Vars
        • B(c);N_GUARD,XP(E)::S(I)
        • B(c);P_PINB(F),S_CUTR(g)::QAR1(H),XP(h)
      • Refutation
        • R(g);
    • Try
      • R(B);
      • Threat
        • R(C)
      • Vars
        • B(c);N_GUARD,XP(E)::S(I)
        • S(j);S_CUTR(g)::QAR1(H),XP(h)
        • S(k);S_CUTR(g)::QAR1(H),XP(h)
      • Refutation
        • P(f);XR(B)
    • Try
      • P(D);
      • Threat
        • R1(B)
      • Vars
        • S(j);S_CUTR(g)::QAR1(H),XP(h)
        • S(k);S_CUTR(g)::QAR1(H),XP(h)
      • Refutation
        • S(k);
  • Actual
    • B(F);XP(h)
    • Threat
      • R(B)
    • Vars
      • B(c);CHECK,S_CUTR(g)::QAR(H)+B(F)
      • K(e);P-FLIGHT::QAR(H)+B(F),DCHECK
      • R(g);OGATE,P_SPINR(g),XB(F)::QAR1(H),XR(g)
      • S(j);S_CUTR(g)::QAR(H)+B(F)
      • S(k);S_CUTR(g)::QAR(H)+B(F)
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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).