MESON Chess Problem Database

Problem Display
PID: 162947 (N1b1B3/3rN1BK/p2p4/2kp4/5p2/bQrp3p/2R5/2q5 w - - 0 1)

Witt, Andreas

StrateGems, 2012

N1b1B3/3rN1BK/p2p4/2kp4/5p2/bQrp3p/2R5/2q5

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Rxc3#
    • 1...Qb1
      • 2.Rxc3#
    • 1...Qd1
      • 2.Rxc3#
    • 1...Qf1
      • 2.Rxc3#
    • 1...Qg1
      • 2.Rxc3#
    • 1...Qh1
      • 2.Rxc3#
    • 1...Rc4
      • 2.Qb6#
    • 1...Ra7
      • 2.Qxc3#
    • 1...Rb7
      • 2.Qxc3#
    • 1...Rc7
      • 2.Qxc3#
    • 1...Rxe7
      • 2.Qxc3#
    • 1...Rd8
      • 2.Qxc3#
    • 1...Bb4
      • 2.Qxd5#
  • Keys
    • 1.Qa4!
      • threat
        • 2.Bd4#
      • 1...Rxe7
        • 2.Qd4#
      • 1...Bb4
        • 2.Qc6#
      • 1...Qe3
        • 2.Rxc3#
      • 1...Qg1
        • 2.Rxc3#
      • 1...Rc4
        • 2.Qa5#
      • 1...d4
        • 2.Bxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::R(A),XR(c)
    • R(c);::QAB1(B)
    • R(k);::QAR2(B),XR(c)
    • R(k);P_PINB(D),XS(C)::QAR2(B),XR(c)
    • B(b);SBLOCK::QAR1(B),XP(h)
  • Actual
    • Q(B);
    • Threat
      • B(D)
    • Vars
      • R(k);P_PINB(D),XS(C)::QAB1(B)
      • B(b);SBLOCK::QAR1(B)
      • Q(a);N_GUARD::R(A),XR(c)
      • R(c);::QAR2(B)
      • P(h);::B(D),XP(h)
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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).