MESON Chess Problem Database

Problem Display
PID: 207173 (B3b3/3p4/1Nr1p3/R1B1kpPn/2R5/qp6/1N1P4/1QK5 w - - 0 1)

Monteiro da Silveira, Jose Luis

Il Problema, 1932

B3b3/3p4/1Nr1p3/R1B1kpPn/2R5/qp6/1N1P4/1QK5

#2

10 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb2+
      • 2.Qxb2#
    • 1...Qb4
      • 2.Sd3#
    • 1...Qa1
      • 2.Sd3#
    • 1...Qa2
      • 2.Sd3#
    • 1...Qa4
      • 2.Sd3#
    • 1...Qxa5
      • 2.Sd3#
    • 1...Sf4
      • 2.d4#
    • 1...f4
      • 2.Qe4#
      • 2.d4#
  • Tries
    • 1.Sxd7+?
      • 1...Kd5
        • 2.Bxa3#
        • 2.Rd4#
        • 2.Qd3#
      • 1...Bxd7!
    • 1.Bxa3+?
      • 1...d5
        • 2.Sd3#
      • 1...Rc5!
    • 1.Rg4?
      • threat
        • 2.d4#
      • 1...Qxb2+
        • 2.Qxb2#
      • 1...Qxc5+
        • 2.S2c4#
      • 1...Rxc5+
        • 2.Sc4#
      • 1...Qb4
        • 2.Sd3#
      • 1...Qa4
        • 2.Sd3#
      • 1...Rd6
        • 2.Sc4#
        • 2.Bd4#
      • 1...fxg4!
  • Keys
    • 1.Rh4!
      • threat
        • 2.d4#
      • 1...Qxb2+
        • 2.Qxb2#
      • 1...Qxc5+
        • 2.S2c4#
      • 1...Rxc5+
        • 2.Sc4#
      • 1...Qb4
        • 2.Sd3#
      • 1...Qa4
        • 2.Sd3#
      • 1...Rd6
        • 2.Sc4#
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(a);CHECK,OGATE,XS(C)::QAB(A),XQ(a)
    • Q(a);N_PINS(C)::S(C)
    • Q(a);N_PINS(C),P_PINQ(A)::S(C)
    • Q(a);N_PINS(C),XR(F)::S(C)
    • S(e);SBLOCK::P(D)
  • Tries
    • Try
      • S(I);CHECK,XP(h)
      • Refutation
        • B(i);XS(I)
    • Try
      • B(G);CHECK,N_SPINS(C),P_SPINR(E),XQ(a)
      • Vars
        • P(h);P_SPINP(h)::S(C)
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • R(E);P_SPINB(G)
      • Threat
        • P(D)
      • Vars
        • Q(a);CHECK,OGATE,XS(C)::QAB(A),XQ(a)
        • Q(a);CHECK,N_PINS(C),P_SPINQ(a),XB(G)::S(C)
        • R(f);CHECK,P_SPINR(f),XB(G)::S(I)
        • Q(a);N_PINS(C)::S(C)
      • Refutation
        • P(d);XR(E)
  • Actual
    • R(E);P_SPINB(G)
    • Threat
      • P(D)
    • Vars
      • Q(a);CHECK,OGATE,XS(C)::QAB(A),XQ(a)
      • Q(a);CHECK,N_PINS(C),P_SPINQ(a),XB(G)::S(C)
      • R(f);CHECK,P_SPINR(f),XB(G)::S(I)
      • Q(a);N_PINS(C)::S(C)
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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).