MESON Chess Problem Database

Problem Display
PID: 17740 (7N/1pn1p1p1/1Rq2kN1/8/3RP1b1/1Q6/KB6/8 w - - 0 1)

Termaat, Nicolaas Ljsbrand Johanne

De Tijd, 1949

7N/1pn1p1p1/1Rq2kN1/8/3RP1b1/1Q6/KB6/8

#2

8 + 7

3105 FIDE Album (1945-1955) 1964

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Rd5#
  • Tries
    • 1.Rd5+?
      • 1...Ke6
        • 2.Sf4#
        • 2.Sf8#
      • 1...e5!
    • 1.Qd5?
      • threat
        • 2.Qe5#
      • 1...Bf5
        • 2.Qxf5#
      • 1...e5
        • 2.Qxe5#
      • 1...Qe6
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd3#
        • 2.Ra4#
        • 2.Rdb4#
        • 2.Rc4#
      • 1...Be6
        • 2.Rc4#
      • 1...Sxd5!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qe5#
      • 1...Qe6+
        • 2.Rd5#
      • 1...Be6+
        • 2.Rc4#
      • 1...Kg5
        • 2.Qh4#
      • 1...Ke6
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...Bf5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(b);P_PINQ(C),S_CUTP(f)::B(B)+R(D)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • B(a);N_GUARD::QAR1(C),XB(a)
        • P(f);::QAB1(C),XP(f)
        • B(a);N_SPINQ(b),P_PINQ(C),S_CUTP(f)::B(B)+R(D)
      • Refutation
        • S(e);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • Q(b);CHECK,S_CUTP(f)::B(B)+R(D)
      • B(a);CHECK,N_SPINQ(b),SBLOCK,S_CUTP(f)::B(B)+R(D)
      • K(c);N_SPINQ(b),P_SPINB(a),S_FLIGHT::QAB1(C)
      • K(c);P-FLIGHT::QAR1(C)
      • P(f);::QAB1(C),XP(f)
      • B(a);::B(B)+R(D),DCHECK
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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).