MESON Chess Problem Database

Problem Display
PID: 108210 (1B6/1Kp3r1/1Qp5/6n1/5k2/2P1R1pB/6P1/8 w - - 0 1)

Bonsirven, Georges

Bulletin de la FFE, 1935

1B6/1Kp3r1/1Qp5/6n1/5k2/2P1R1pB/6P1/8

#2

7 + 6

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rg8
      • 2.Bxc7#
  • Tries
    • 1.Rf3+?
      • 1...Ke4
        • 2.Qd4#
      • 1...Ke5
        • 2.Qd4#
      • 1...Sxf3!
    • 1.Re4+?
      • 1...Kxe4
        • 2.Qd4#
      • 1...Sxe4!
  • Keys
    • 1.Re5!
      • threat
        • 2.Qe3#
      • 1...cxb6+
        • 2.Re7#
      • 1...Kxe5
        • 2.Qd4#
      • 1...Sxh3
        • 2.Qd4#
      • 1...Se4
        • 2.Rf5#
      • 1...c5
        • 2.Qf6#

Anticipated by 136254(0000)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(f);N_GUARD::B(G),XP(e)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(b);N_SPINP(e),P-FLIGHT::QAR1(E)
        • K(b);S_FLIGHT::QAB1(E)
      • Refutation
        • S(c);XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • K(b);N_SPINP(e),P-FLIGHT,XR(C)::QAR1(E)
      • Refutation
        • S(c);XR(C)
  • Actual
    • R(C);N_PINP(e)
    • Threat
      • QAB1(E)
    • Vars
      • P(e);CHECK,OGATEB,XQ(E)::B(G)+R(C)
      • K(b);P_SPINP(e),S_FLIGHT,XR(C)::QAB1(E)
      • S(c);N_GUARD,XB(D)::QAR2(E)
      • S(c);SBLOCK::R1(C)
      • P(d);OGATE::QAR2(E)
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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).