MESON Chess Problem Database

Problem Display
PID: 132613 (8/4R3/3p4/3Pp1B1/1P2krP1/2K2p2/3p4/Q2R2N1 w - - 0 1)

Koltanowski, George

Source?, 0000

8/4R3/3p4/3Pp1B1/1P2krP1/2K2p2/3p4/Q2R2N1

#2

9 + 6

2425 San Francisco Chronicle 0000

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qa8#
  • Tries
    • 1.Rxd2?
      • threat
        • 2.Qe1#
      • 1...Ke3
        • 2.Qe1#
      • 1...Rxg4
        • 2.Qb1#
      • 1...f2!
    • 1.Qa6?
      • threat
        • 2.Qd3#
      • 1...Kxd5
        • 2.Qb7#
        • 2.Qa8#
      • 1...Ke3!
    • 1.Qa7?
      • threat
        • 2.Qd4#
      • 1...Kxd5
        • 2.Qb7#
        • 2.Qa8#
      • 1...Rxg4!
  • Keys
    • 1.Kc4!
      • threat
        • 2.Qd4#
      • 1...Ke3+
        • 2.Qd4#
      • 1...Rxg4
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINP(e),OGATEB,P_SPINP(a),S_FLIGHT,XP(G)::QAB(A)
  • Tries
    • Try
      • R(B);XP(a)
      • Threat
        • QAR(A)
      • Vars
        • K(c);P-FLIGHT,P_SPINR(d)::QAR2(A)
        • R(d);XP(F)::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • K(c);P-FLIGHT,P_SPINR(d)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Refutation
        • R(d);XP(F)
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • QAR1(A)
    • Vars
      • K(c);CHECK,P-FLIGHT,P_SPINR(d)::QAB1(A)
      • R(d);XP(F)::QAB(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).