MESON Chess Problem Database

Problem Display
PID: 9948 (1B1qR1B1/Q3b2P/1r1P1N2/1N2kbKR/3r1p2/5P2/8/8 w - - 0 1)

Morice, Jean

Comm., 2. Peugeot Ty., 1961-1962

1B1qR1B1/Q3b2P/1r1P1N2/1N2kbKR/3r1p2/5P2/8/8

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rdxd6
      • 2.Qa1#
    • 1...Ra6
      • 2.Qxd4#
    • 1...Rc6
      • 2.Qxd4#
    • 1...Rbxd6
      • 2.Qxd4#
    • 1...Rb7
      • 2.Qxd4#
    • 1...Rxb8
      • 2.Qxd4#
    • 1...Bg6
      • 2.Kxg6#
  • Tries
    • 1.Rxe7+?
      • 1...Be6
        • 2.Kg6#
        • 2.Rxe6#
      • 1...Qxe7!
    • 1.Qxe7+?
      • 1...Be6
        • 2.Kh4#
        • 2.Kg6#
        • 2.Kh6#
        • 2.Qxe6#
      • 1...Qxe7!
  • Keys
    • 1.Kh6!
      • threat
        • 2.Sg4#
      • 1...Kxf6
        • 2.h8Q#
        • 2.h8B#
      • 1...Qxd6
        • 2.Qxe7#
      • 1...Rdxd6
        • 2.Qa1#
      • 1...Rbxd6
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(a);OGATEB,P_SPINR(a),XP(E)::QAB(G)
    • R(e);OGATE::QAB1(G),XR(a)
    • R(e);OGATE,P_SPINR(e),XP(E)::QAB1(G),XR(a)
    • R(e);OGATE,XB(I)::QAB1(G),XR(a)
    • B(d);::R(D)+K(C),XB(d)
  • Tries
    • Try
      • R(J);CHECK,N_SPINS(F),XB(f)
      • Refutation
        • Q(g);P_PINS(F),XR(J)
    • Try
      • Q(G);CHECK,N_SPINS(F),XB(f)
      • Refutation
        • Q(g);P_PINS(F),P_SPINQ(g),XQ(G)
  • Actual
    • K(C);N_PINB(f),N_SPINS(F),P_PINB(d),S_FLIGHT
    • Threat
      • S(F)
    • Vars
      • K(c);N_SPINB(d),S_FLIGHT,XS(F)::P=Q
      • Q(g);N_GUARD,P_PINS(F),P_SPINQ(g),XP(E)::QAR2(G),XB(f)
      • R(a);OGATEB,P_PINS(F),P_SPINR(a),XP(E)::QAB(G)
      • R(e);OGATE,P_PINS(F),P_SPINR(e),XP(E)::QAB1(G),XR(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).