MESON Chess Problem Database

Problem Display
PID: 140457 (8/3p1Q2/3K4/1prPpN1B/1Pk1N2R/P2p3p/P3q3/4B3 w - - 0 1)

Cheylan, Yves

Comm., BCF 131. Ty., 1972-1973

8/3p1Q2/3K4/1prPpN1B/1Pk1N2R/P2p3p/P3q3/4B3

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Rxe4#
    • 1...Rxd5+
      • 2.Qxd5#
    • 1...Rc6+
      • 2.dxc6#
    • 1...d2
      • 2.Bxe2#
  • Keys
    • 1.Kxe5!
      • threat
        • 2.Sd6#
      • 1...Qb2+
        • 2.Sc3#
      • 1...Qh2+
        • 2.Seg3#
      • 1...Qxe4+
        • 2.Rxe4#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...d6+
        • 2.Sxd6#
      • 1...Qxh5
        • 2.Sd6#
      • 1...Qxa2
        • 2.Sxc5#
      • 1...d2
        • 2.Bxe2#
      • 1...Rc6
        • 2.d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(a);OGATE,P_SPINQ(a),XS(E)::R(F),XQ(a)
    • R(f);CHECK,OGATE,P_SPINR(f),XP(G)::QAB1(K),XR(f)
    • R(f);CHECK,OGATE::QAB(K)+P(G),XR(f)
    • P(b);OGATEB::B(I),XQ(a)
  • Actual
    • K(J);P_SPINP(G),P_SPINS(E),S_FLIGHT,XP(g)
    • Threat
      • S(H)
    • Vars
      • Q(a);CHECK,N_PINS(E)::R(F)+S(E)
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(E)::R(F),XQ(a)
      • R(f);CHECK,OGATE,P_SPINR(f),XP(G)::QAB1(K),XR(f)
      • P(h);CHECK::S(H),XP(h)
      • Q(a);N_PINS(E),P_PINS(H),XB(I)::R(F)+S(E),DCHECK
      • Q(a);N_PINS(E),XP(B)::R(F)+S(E),XR(f)
      • P(b);OGATEB::B(I),XQ(a)
      • R(f);N_PINP(G)::QAB(K)+P(G)
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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).