MESON Chess Problem Database

Problem Display
PID: 147369 (2q1r3/6b1/1R1B4/2Pk1B2/4p3/1K2Q3/8/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1977

2q1r3/6b1/1R1B4/2Pk1B2/4p3/1K2Q3/8/8

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc5
      • 2.Qxc5#
    • 1...Re5
      • 2.Qd2#
    • 1...Rd8
      • 2.Qxe4#
    • 1...Rf8
      • 2.Qxe4#
    • 1...Rg8
      • 2.Qxe4#
    • 1...Rh8
      • 2.Qxe4#
    • 1...Be5
      • 2.Qxe4#
    • 1...Bf8
      • 2.Qd2#
  • Tries
    • 1.Qd3+?
      • 1...Bd4
        • 2.Qc4#
      • 1...exd3!
  • Keys
    • 1.Be5!
      • threat
        • 2.Qd4#
      • 1...Kxe5
        • 2.Qxe4#
      • 1...Qxc5
        • 2.Qxe4#
      • 1...Rxe5
        • 2.Rd6#
      • 1...Bxe5
        • 2.Bxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(d);OGATE,XP(C)::QAR1(B),XQ(d)
    • R(e);S_CUTB(c)::QAR(B)
    • R(e);N_GUARD::QAB1(B),XP(a)
    • B(c);S_CUTR(e)::QAB1(B),XP(a)
    • B(c);N_GUARD::QAR(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • B(c);P_SPINB(c)::QAB1(B)
      • Refutation
        • P(a);XQ(B)
  • Actual
    • B(F);
    • Threat
      • QAR1(B)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a),XB(F)::QAR1(B),XP(a)
      • Q(d);SBLOCK,XP(C)::QAB1(B),XP(a)
      • R(e);SBLOCK,XB(F)::R1(E)
      • B(c);SBLOCK,XB(F)::B(D),XP(a)
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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).