MESON Chess Problem Database

Problem Display
PID: 202262 (K7/P2B2p1/pk3bbR/1N4r1/3P2r1/Q7/P4B2/1R6 w - - 0 1)

Ellerman, Arnoldo

La Strategie, 1923

K7/P2B2p1/pk3bbR/1N4r1/3P2r1/Q7/P4B2/1R6

#2

10 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.dxc5#
    • 1...Be4+
      • 2.d5#
    • 1...a5
      • 2.Qd6#
  • Tries
    • 1.Be1?
      • threat
        • 2.Ba5#
        • 2.Qd6#
        • 2.Qa5#
      • 1...Rxd4
        • 2.Ba5#
      • 1...Bxd4
        • 2.Ba5#
        • 2.Qd6#
      • 1...axb5
        • 2.Qd6#
        • 2.Qa5#
      • 1...a5
        • 2.Qd6#
        • 2.Qxa5#
      • 1...Rc5
        • 2.Ba5#
        • 2.Qxc5#
        • 2.Qa5#
        • 2.dxc5#
      • 1...Rd5
        • 2.Ba5#
        • 2.Qa5#
      • 1...Be5
        • 2.Ba5#
        • 2.Qc5#
        • 2.Qa5#
      • 1...Be7
        • 2.Ba5#
        • 2.Qa5#
      • 1...Be4+!
  • Keys
    • 1.Kb8!
      • threat
        • 2.a8S#
      • 1...Be5+
        • 2.Sc7#
      • 1...a5
        • 2.Qd6#
      • 1...Be4
        • 2.d5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATE::P(E),XR(b)
    • B(f);CHECK,P_SPINB(e),S_CUTR(a)::B(C)+P(E)
    • P(c);SBLOCK::QAR2(D)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(3)
      • Vars
        • R(a);XP(E)::B(C)
      • Refutation
        • B(f);CHECK,P_SPINB(e)
  • Actual
    • K(J);P-FLIGHT
    • Threat
      • P=S
    • Vars
      • B(e);CHECK,P_SPINB(f),S_CUTR(b)::R(A)+S(F)
      • P(c);SBLOCK::QAR2(D)
      • B(f);P_SPINB(e),S_CUTR(a)::B(C)+P(E)
HTML5 logo

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).