MESON Chess Problem Database

Problem Display
PID: 259291 (B7/8/p2Np3/4N1QK/1Bpk1p2/Rn4Pp/4r3/2b5 w - - 0 1)

Kummer, Konrad

Schweizerische Arbeiter Schachzeitung, 1941

B7/8/p2Np3/4N1QK/1Bpk1p2/Rn4Pp/4r3/2b5

#2

8 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qxf4#
    • 1...Rd2
      • 2.Qxf4#
    • 1...Sa1
      • 2.Sf3#
      • 2.Sc6#
    • 1...Sd2
      • 2.Sc6#
    • 1...Sa5
      • 2.Sf3#
    • 1...Sc5
      • 2.Sf3#
      • 2.Sc6#
  • Tries
    • 1.Sdxc4?
      • threat
        • 2.Qd8#
      • 1...Sc5
        • 2.Bc3#
      • 1...Rxe5!
    • 1.Sb5+?
      • 1...Ke3
        • 2.Qxf4#
      • 1...axb5!
    • 1.Sf5+?
      • 1...Kxe5
        • 2.Bd6#
      • 1...exf5!
    • 1.Qxf4+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Bxf4!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Sdxc4#
      • 1...Rxe5+
        • 2.Sf5#
      • 1...Ke3
        • 2.Qb6#
      • 1...Kxe5
        • 2.Qh8#
      • 1...Sc5
        • 2.Sf3#
      • 1...c3
        • 2.Sdc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • K(f);P_SPINP(g),P_SPINS(c),S_CUTB(a),S_CUTR(b),S_FLIGHT::QAB1(E),XP(g)
    • R(b);N_GUARD,S_CUTB(a)::QAR2(E),XP(g)
    • S(c);::S(D)
  • Tries
    • Try
      • S(G);XP(e)
      • Threat
        • QAR(E)
      • Vars
        • S(c);SBLOCK::B(C)
      • Refutation
        • R(b);P_PINQ(E),XS(D)
    • Try
      • S(G);CHECK
      • Vars
        • K(f);P_SPINP(g),P_SPINS(c),S_FLIGHT::QAB1(E),XP(g)
      • Refutation
        • P(h);XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • K(f);N_GUARD,S_CUTP(i),S_FLIGHT,XS(D)::B(C)
      • Refutation
        • P(i);XS(G)
    • Try
      • Q(E);CHECK,XP(g)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(E),XR(b)
      • Refutation
        • B(a);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAR(E)+S(G),XP(e)
    • Vars
      • R(b);CHECK,SBLOCK,XS(D)::QAR(E)+S(G),DCHECK
      • K(f);N_GUARD,P_SPINS(c),S_FLIGHT::QAB(E)
      • K(f);OGATEB,S_FLIGHT,XS(D)::QAB(E)
      • S(c);::S(D)
      • P(e);::QAR(E)+S(G)
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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).