MESON Chess Problem Database

Problem Display
PID: 64304 (4R3/B7/4r3/6N1/5N1b/1K3p1q/1P1p1p1p/3rkn1Q w - - 0 1)

Maillard, Richard

1st Prize, Match: Czechoslovakia - France, 1936

4R3/B7/4r3/6N1/5N1b/1K3p1q/1P1p1p1p/3rkn1Q

#2

7 + 10

81 Chess 1946
136 Problem Observer 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Rxe6#
    • 1...Qf5
      • 2.Sxf3#
    • 1...Qg3
      • 2.Rxe6#
    • 1...Re2
      • 2.Sd3#
    • 1...Re3+
      • 2.Rxe3#
    • 1...Re4
      • 2.Rxe4#
    • 1...Re5
      • 2.Rxe5#
    • 1...Bg3
      • 2.Sxf3#
  • Tries
    • 1.Qxf1+?
      • 1...Qxf1
        • 2.Sxf3#
      • 1...Kxf1!
  • Keys
    • 1.Qxf3!
      • threat
        • 2.Sd3#
      • 1...Qxf3+
        • 2.Sxf3#
      • 1...Se3
        • 2.Qe2#
      • 1...Sg3
        • 2.Qxf2#
      • 1...Qf5
        • 2.Sg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(h);N_GUARD::R(G),XR(j)
    • Q(h);N_GUARD::S(E),XP(g)
    • R(j);::S(D)
    • R(j);CHECK,OGATE::R(G),XR(j)
    • R(j);OGATE::R(G),XR(j)
    • B(i);S_CUTQ(h)::S(E),XP(g)
  • Tries
    • Try
      • Q(A);CHECK,XS(c)
      • Vars
        • Q(h);SBLOCK,XQ(A)::S(E),XP(g)
      • Refutation
        • K(b);N_SPINR(j),P-FLIGHT,XQ(A)
  • Actual
    • Q(A);N_PINS(c),P_SPINQ(A),XP(g)
    • Threat
      • S(D)
    • Vars
      • Q(h);CHECK,XQ(A)::S(E),XQ(h)
      • S(c);N_PINQ(A),N_SPINR(j)::QAR1(A)
      • S(c);N_PINQ(A)::QAB1(A),XP(e)
      • Q(h);N_GUARD,N_PINQ(A)::S(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).