MESON Chess Problem Database

Problem Display
PID: 261976 (K4B2/2p2n1q/2RN4/8/1kB1Pb2/1p4r1/1P1N2n1/R3Q2r w - - 0 1)

Rago, Istvan Stefano

Problemnoter, 1961

K4B2/2p2n1q/2RN4/8/1kB1Pb2/1p4r1/1P1N2n1/R3Q2r

#2

10 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd2
      • 2.Sxf7#
    • 1...Se3
      • 2.Sf1#
    • 1...Se5
      • 2.Sf7#
  • Tries
    • 1.Sf1+?
      • 1...Rc3
        • 2.Qxc3#
        • 2.bxc3#
      • 1...Bd2
        • 2.Sxf7#
      • 1...Sxe1!
  • Keys
    • 1.Ba6!
      • threat
        • 2.Rc4#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Rc3
        • 2.bxc3#
      • 1...Se3
        • 2.Sf1#
      • 1...Se5
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(f);N_GUARD,P_SPINB(f),XS(D)::B(J)+S(H),XS(h)
    • S(b);N_GUARD,S_CUTB(f),S_CUTR(d)::QAB(B)+S(D)
    • S(h);S_CUTB(f)::B(J)+S(H)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • B(f);P_SPINB(f)::B(J)+S(H),XS(h)
      • Refutation
        • S(b);XQ(B)
  • Actual
    • B(E);
    • Threat
      • R1(G)
    • Vars
      • Q(i);OGATE,P_PINR(G),XP(F)::QAR(B),XQ(i)
      • R(d);OGATE::P(C),XR(d)
      • S(b);N_GUARD,S_CUTB(f),S_CUTR(d)::QAB(B)+S(D)
      • S(h);S_CUTB(f)::B(J)+S(H)
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).