MESON Chess Problem Database

Problem Display
PID: 272668 (2N1n3/1K6/2P1k1B1/R2RBp2/8/8/2p1Q3/7q w - - 0 1)

Baptista, Manuel

The Problemist, 1957

2N1n3/1K6/2P1k1B1/R2RBp2/8/8/2p1Q3/7q

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bxa1#
      • 2.Bb2#
      • 2.Bc3#
      • 2.Bd4#
    • 1...Qb1+
      • 2.Bb2#
    • 1...Qh7+
      • 2.Bg7#
    • 1...Qh8
      • 2.Bg7#
      • 2.Bxh8#
    • 1...Sd6+
      • 2.Rxd6#
    • 1...Sf6
      • 2.Rd6#
    • 1...Sc7
      • 2.Rd6#
    • 1...Sg7
      • 2.Rd6#
    • 1...f4
      • 2.Qg4#
  • Tries
    • 1.Rd7?
      • threat
        • 2.Bf7#
        • 2.Re7#
      • 1...Qb1+
        • 2.Bb2#
      • 1...Sd6+
        • 2.Rxd6#
      • 1...Qh4
        • 2.Bf7#
      • 1...Qh5
        • 2.Re7#
        • 2.Qc4#
      • 1...Qh7
        • 2.Ba1#
        • 2.Bb2#
        • 2.Bc3#
        • 2.Bd4#
        • 2.Bg7#
        • 2.Bh8#
        • 2.Qc4#
      • 1...f4
        • 2.Re7#
        • 2.Qg4#
      • 1...Qxc6+!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Rd6#
      • 1...Qb1+
        • 2.Rdb5#
      • 1...Qh7+
        • 2.Rd7#
      • 1...Sd6+
        • 2.Rxd6#
      • 1...Qxd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(a);CHECK,N_GUARD::QAR(A)+B(D)
    • S(e);CHECK,N_GUARD::R1(C),XS(e)
    • S(e);N_GUARD::R1(C)
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • R(C);P_SPINP(E)
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,N_GUARD,N_PINP(E)::QAR(A)+B(D)
        • S(e);CHECK,N_GUARD::R1(C),XS(e)
        • Q(a);N_PINP(E)::B(F)
      • Refutation
        • Q(a);CHECK,XP(E)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(C),DCHECK
    • Vars
      • Q(a);CHECK,N_GUARD::QAB(A)+R(C)
      • S(e);CHECK::QAB(A)+R(C),DCHECK,XS(e)
      • Q(a);OGATE,P_PINP(E),P_SPINQ(a),XR(C)::QAB1(A),XQ(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).