MESON Chess Problem Database

Problem Display
PID: 32437 (r2bK1nr/p1pp1B2/1pP1Np1p/1P1k1NP1/3PqBn1/2R2Q2/2P5/8 w - - 0 1)

Termaat, Nicolaas Ljsbrand Johanne

De Problemist, 1928

r2bK1nr/p1pp1B2/1pP1Np1p/1P1k1NP1/3PqBn1/2R2Q2/2P5/8

#2

12 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf3
      • 2.Sc5#
    • 1...Be7+
      • 2.Sd8#
    • 1...Sf2
      • 2.Se3#
    • 1...Sh2
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Se5
      • 2.Sxc7#
    • 1...Se7+
      • 2.Sf8#
  • Tries
    • 1.Kxd7?
      • threat
        • 2.Sc5#
        • 2.Sxc7#
        • 2.Seg7#
        • 2.Sxd8#
        • 2.Sf8#
      • 1...Qxf3
        • 2.Sc5#
      • 1...Rh7
        • 2.Sxc7#
        • 2.Seg7#
      • 1...Be7
        • 2.Sc5#
        • 2.Sxc7#
        • 2.Seg7#
        • 2.Sd8#
        • 2.Sf8#
      • 1...Se5+!
    • 1.Be5?
      • threat
        • 2.Sf4#
        • 2.Sc5#
        • 2.Sxc7#
        • 2.Seg7#
        • 2.Sxd8#
        • 2.Sf8#
      • 1...Be7+
        • 2.Sd8#
      • 1...Se7+
        • 2.Sf8#
      • 1...Qxf3
        • 2.Sc5#
      • 1...Sxe5
        • 2.Sf4#
        • 2.Sxc7#
      • 1...Rh7
        • 2.Sf4#
        • 2.Sxc7#
        • 2.Seg7#
      • 1...dxe6!
  • Keys
    • 1.Ra3!
      • threat
        • 2.Qb3#
      • 1...Be7+
        • 2.Sd8#
      • 1...Se7+
        • 2.Sf8#
      • 1...Kc4
        • 2.Qb3#
      • 1...Qxf3
        • 2.Sc5#
      • 1...Se3
        • 2.Sxe3#
      • 1...Se5
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_PINS(J),N_SPINQ(a),XQ(C)::B(K)+S(J)
    • B(k);CHECK,N_PINS(J)::B(K)+S(J)
    • S(b);N_GUARD::S(G)
    • S(b);N_GUARD::S(G),XS(b)
    • S(b);N_PINS(J)::B(K)+S(J),DCHECK,XP(h)
    • S(l);CHECK,N_PINS(J)::B(K)+S(J)
  • Tries
    • Try
      • K(L);N_SPINS(J),S_FLIGHT,XP(i)
      • Threat
        • DUALS(5)
      • Vars
        • Q(a);N_SPINQ(a),XQ(C)::B(K)+S(J)
      • Refutation
        • S(b);CHECK
    • Try
      • B(E);N_SPINS(J)
      • Threat
        • DUALS(6)
      • Vars
        • B(k);CHECK::B(K)+S(J)
        • S(l);CHECK::B(K)+S(J)
        • Q(a);N_SPINQ(a),XQ(C)::B(K)+S(J)
      • Refutation
        • P(i);P_SPINP(i),XS(J)
  • Actual
    • R(B);
    • Threat
      • QAB(C)
    • Vars
      • B(k);CHECK,N_PINS(J)::B(K)+S(J)
      • S(l);CHECK,N_PINS(J)::B(K)+S(J)
      • K(c);N_SPINQ(a),S_FLIGHT::QAB1(C)
      • Q(a);N_PINS(J),N_SPINQ(a),XQ(C)::B(K)+S(J)
      • S(b);N_GUARD::S(G),XS(b)
      • S(b);N_PINS(J)::B(K)+S(J),DCHECK,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).