MESON Chess Problem Database

Problem Display
PID: 152132 (q1r4B/bn4R1/3p1kpP/p5p1/3P2Bp/4P2P/R1p2K2/Q7 w - - 0 1)

Ellerman, Arnoldo

Good Companions (April), 1915

q1r4B/bn4R1/3p1kpP/p5p1/3P2Bp/4P2P/R1p2K2/Q7

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.dxc5#
    • 1...Bxd4
      • 2.Qxd4#
    • 1...Bc5
      • 2.dxc5#
    • 1...Sc5
      • 2.dxc5#
      • 2.d5#
    • 1...Sd8
      • 2.Rxa7#
      • 2.Rb7#
      • 2.Rc7#
      • 2.Rd7#
      • 2.Rh7#
  • Tries
    • 1.d5+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Rc3!
  • Keys
    • 1.Kg2!
      • threat
        • 2.Qf1#
      • 1...Sc5+
        • 2.d5#
      • 1...Sd8+
        • 2.Rb7#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...c1Q
        • 2.Rf2#
      • 1...c1S
        • 2.Rf2#
      • 1...c1B
        • 2.Rf2#
      • 1...c1R
        • 2.Rf2#
      • 1...Rc5
        • 2.dxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(k);OGATE::QAB(A)+P(F),XR(k)
    • B(h);OGATE,P_PINP(D),P_SPINB(h),XP(F)::QAB(A),XB(h)
    • B(h);OGATE::QAB(A)+P(F),XB(h)
  • Tries
    • Try
      • P(F);CHECK,P_SPINP(D)
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAB(A),XB(h)
      • Refutation
        • R(k);P_SPINR(k)
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • QAR(A)
    • Vars
      • S(i);CHECK,S_CUTB(h),S_CUTR(k)::QAB(A)+P(F)
      • S(i);CHECK,S_CUTR(k)::B(J)+R(I)
      • B(h);OGATE,P_SPINB(h),XP(F)::QAB(A),XB(h)
      • P(a);OGATE::R(B)
      • R(k);OGATE::QAB(A)+P(F),XR(k)
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).