MESON Chess Problem Database

Problem Display
PID: 100944 (Q7/3pK3/2r1B1p1/2P1N1P1/R1P1kB1R/2P2rP1/3P4/8 w - - 0 1)

Fontana, Alessandro

Good Companions, 1919

Q7/3pK3/2r1B1p1/2P1N1P1/R1P1kB1R/2P2rP1/3P4/8

#2

13 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.d3#
    • 1...Rf2
      • 2.d3#
    • 1...Rxg3
      • 2.Bxg3#
    • 1...d5
      • 2.cxd5#
  • Tries
    • 1.Be3+?
      • 1...Kxe5
        • 2.Bd4#
        • 2.d4#
      • 1...Rf4!
    • 1.Qxc6+?
      • 1...d5
        • 2.Qxd5#
        • 2.cxd5#
        • 2.cxd5 ep#
      • 1...dxc6!
  • Keys
    • 1.Kf6!
      • 1...Rxf4+
        • 2.Rxf4#
      • 1...Rxc3
        • 2.Be3#
      • 1...Rxg3
        • 2.Bxg3#
      • 1...dxe6
        • 2.Qxc6#
      • 1...Rf1
        • 2.d3#
      • 1...Rf2
        • 2.d3#
      • 1...Rd3
        • 2.Be3#
      • 1...Re3
        • 2.Bxe3#
      • 1...d5
        • 2.cxd5#
      • 1...d6
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::P(A)
    • R(a);OGATE,XP(C)::R(G)+B(F),XR(a)
    • P(e);N_SPINR(c),OGATE::R(D)+P(E),XP(e)
  • Tries
    • Try
      • B(F);CHECK
      • Refutation
        • R(a);N_SPINR(c),P_SPINR(a)
    • Try
      • Q(M);CHECK,XR(c)
      • Refutation
        • P(e);XQ(M)
  • Actual
    • K(L);P_SPINB(F),S_FLIGHT
    • Vars
      • R(a);CHECK,N_SPINR(c),OGATE,P_PINB(K),P_SPINR(a),XB(F)::R1(G),XR(a)
      • R(a);N_PINB(F),P_PINB(K),XP(B)::R(G)+B(F)
      • R(a);N_PINB(F),P_PINB(K),XP(C)::R(G)+B(F),XR(a)
      • P(e);N_GUARD,XB(K)::QAB(M),XR(c)
      • R(a);N_GUARD::P(A)
      • R(a);N_PINB(F),P_PINB(K)::R(G)+B(F)
      • R(a);N_PINB(F),P_PINB(K)::R(G)+B(F),XR(a)
      • P(e);N_SPINR(c),OGATE::R(D)+P(E),XP(e)
      • P(e);OGATE::B(K)
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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).