MESON Chess Problem Database

Problem Display
PID: 73705 (1B1K4/4p3/2N2pP1/P2k1rr1/Q2p2Bp/2p1q3/2P1N1b1/4R3 w - - 0 1)

Verdonk, Johannes Bernardus

Tijdschrift vd KNSB, 1938

1B1K4/4p3/2N2pP1/P2k1rr1/Q2p2Bp/2p1q3/2P1N1b1/4R3

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sxc3#
    • 1...Ke6
      • 2.Sf4#
  • Tries
    • 1.Qb5+?
      • 1...Ke6
        • 2.Sexd4#
        • 2.Sf4#
      • 1...Ke4!
    • 1.Qc4+?
      • 1...Ke4
        • 2.Sxc3#
      • 1...Kxc4!
  • Keys
    • 1.Sa7!
      • threat
        • 2.Qc6#
      • 1...Ke4
        • 2.Sxc3#
      • 1...Kc5
        • 2.Qb5#
      • 1...Ke6
        • 2.Sf4#
        • 2.Qd7#
      • 1...Qe6
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(f);P_SPINP(d),S_FLIGHT::S(C),XP(b)
    • K(f);P_SPINR(g),S_FLIGHT::S(C)
  • Tries
    • Try
      • Q(D);CHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(f);P_SPINP(d),S_FLIGHT::S(C),XP(b)
      • Refutation
        • K(f);S_FLIGHT,XQ(D)
  • Actual
    • S(G);
    • Threat
      • QAB1(D)
    • Vars
      • K(f);P_SPINP(d),S_FLIGHT::S(C),XP(b)
      • K(f);P-FLIGHT::QAR1(D)
      • Q(c);N_GUARD,SBLOCK::QAR1(D),XP(d)
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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).