MESON Chess Problem Database

Problem Display
PID: 202323 (3R3B/1KN3r1/1n4pq/1Bpn1p1p/p1pk4/N2p1P2/1r2RP2/Q7 w - - 0 1)

Larsen, Karl Adolf Koefoed

Tidskrift for Schack, 1923

3R3B/1KN3r1/1n4pq/1Bpn1p1p/p1pk4/N2p1P2/1r2RP2/Q7

#2

10 + 13

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qxb2#
    • 1...Qc1
      • 2.Bxg7#
    • 1...Qd2
      • 2.Bxg7#
  • Tries
    • 1.Rxd5+?
      • 1...Kc3
        • 2.Qxb2#
      • 1...Sxd5!
  • Keys
    • 1.Bxc4!
      • threat
        • 2.Qxb2#
      • 1...Sxc4+
        • 2.Sb5#
      • 1...Sd7+
        • 2.Scb5#
      • 1...Kc3
        • 2.Qxb2#
      • 1...Qc1
        • 2.Bxg7#
      • 1...Qd2
        • 2.Bxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINS(g),S_FLIGHT::QAB1(A),XR(a)
    • Q(l);N_GUARD::B(J),XR(m)
  • Tries
    • Try
      • R(I);CHECK,XS(g)
      • Vars
        • K(e);S_FLIGHT::QAB1(A),XR(a)
      • Refutation
        • S(j);P_PINB(F),XR(I)
  • Actual
    • B(F);XP(d)
    • Threat
      • QAB(A),XR(a)
    • Vars
      • S(j);CHECK,SBLOCK,XB(F)::S(D)
      • S(j);CHECK,N_PINS(H),N_SPINS(g)::S(H)
      • K(e);N_SPINS(g),S_FLIGHT::QAB1(A),XR(a)
      • Q(l);N_GUARD::B(J),XR(m)
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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).