MESON Chess Problem Database

Problem Display
PID: 234100 (B3qNRQ/p3Pb2/2nP4/2K1R2r/1pP2B2/4N3/2P5/7k w - - 0 1)

Dragoescu, Radu

Buletin Problemistic, 1978

B3qNRQ/p3Pb2/2nP4/2K1R2r/1pP2B2/4N3/2P5/7k

#2

12 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Qxh2#
    • 1...Rh3
      • 2.Qxh3#
    • 1...Rh4
      • 2.Qxh4#
  • Tries
    • 1.Bxc6+?
      • 1...Bd5
        • 2.Bxd5#
      • 1...Qxc6+!
    • 1.Reg5?
      • threat
        • 2.Qa1#
      • 1...Rxh8
        • 2.Rg1#
      • 1...Bxc4!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Qa1#
      • 1...Rxh8
        • 2.Rd1#
      • 1...Sd4
        • 2.Rxh5#
      • 1...Se5
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(c);N_PINR(F),OGATE::QAR1(L),XR(c)
    • R(c);N_PINR(F),OGATE::QAR2(L),XR(c)
    • R(c);N_PINR(F),OGATE::QAR(L),XR(c)
  • Tries
    • Try
      • B(I);CHECK,XS(d)
      • Vars
        • B(f);N_GUARD,N_PINR(F),P_SPINB(f)::B(I),XB(f)
      • Refutation
        • Q(g);CHECK,XB(I)
    • Try
      • R(F);
      • Threat
        • QAB1(L)
      • Vars
        • R(c);N_PINR(F),N_SPINR(c),XQ(L)::R1(F)
      • Refutation
        • B(f);XP(C)
  • Actual
    • R(F);N_PINS(d)
    • Threat
      • QAB1(L)
    • Vars
      • R(c);N_PINR(F),N_SPINR(c),XQ(L)::R(F)
      • S(d);::B(I)+R(F),DCHECK,XR(c)
      • S(d);N_PINR(F)::B(I)+R(F),DCHECK
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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).