MESON Chess Problem Database

Problem Display
PID: 98331 (2nr1N2/7B/7n/rR1qk2N/p2pP1p1/BQ3p2/1K6/3R4 w - - 0 1)

Michel, Francois

Monreal, Pierre

Problemas, 1972

2nr1N2/7B/7n/rR1qk2N/p2pP1p1/BQ3p2/1K6/3R4

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qe6#
    • 1...Re8
      • 2.Qxd5#
    • 1...Rxf8
      • 2.Qxd5#
    • 1...Sd6
      • 2.Qxd5#
    • 1...f2
      • 2.Qg3#
    • 1...d3
      • 2.Qc3#
  • Tries
    • 1.Sg6+?
      • 1...Kxe4
        • 2.Sg3#
        • 2.Qd3#
      • 1...Ke6!
    • 1.Sd7+?
      • 1...Ke6
        • 2.Qxd5#
      • 1...Rxd7!
  • Keys
    • 1.Re1!
      • threat
        • 2.exd5#
      • 1...Qxb5
        • 2.Sg6#
      • 1...Qc5
        • 2.Qe6#
      • 1...d3
        • 2.Qc3#
      • 1...Sf5
        • 2.exf5#
      • 1...Sd6
        • 2.Qxd5#
      • 1...f2
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(f);OGATE::QAR1(D)
    • R(j);N_GUARD::QAR1(D),XQ(f)
    • R(j);N_GUARD,XS(I)::QAR1(D),XQ(f)
    • S(i);S_CUTR(j)::QAR1(D),XQ(f)
    • P(a);OGATE::QAB(D)
    • P(c);OGATEB::QAB(D)
  • Tries
    • Try
      • S(I);CHECK
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • S(I);CHECK
      • Vars
        • K(g);P-FLIGHT::QAB1(D),XQ(f)
      • Refutation
        • R(j);XS(I)
  • Actual
    • R(A);
    • Threat
      • R(A)+P(E),XQ(f)
    • Vars
      • Q(f);N_SPINQ(f),P_PINQ(D),XR(F)::S(I)
      • Q(f);OGATE::QAR1(D)
      • P(c);OGATEB::QAB(D)
      • S(h);OGATE::R(A)+P(E),XS(h)
      • S(i);S_CUTR(j)::QAR1(D),XQ(f)
      • P(a);OGATE::QAB(D)
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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).