MESON Chess Problem Database

Problem Display
PID: 83724 (K2N1B2/2p1pP1q/PR4B1/1r2k1P1/2pnP3/Np3pPb/1Q2p2n/2r5 w - - 0 1)

Ellerman, Arnoldo

1st HM., Problem (Zagreb), 1953

K2N1B2/2p1pP1q/PR4B1/1r2k1P1/2pnP3/Np3pPb/1Q2p2n/2r5

#2

12 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Bg7#
    • 1...Qh5
      • 2.Bg7#
    • 1...Qxf7
      • 2.Sxf7#
    • 1...Qg7
      • 2.Bxg7#
    • 1...Ra1
      • 2.Sxc4#
    • 1...Rb1
      • 2.Sxc4#
    • 1...Rd1
      • 2.Sxc4#
    • 1...Re1
      • 2.Sxc4#
    • 1...Rf1
      • 2.Sxc4#
    • 1...Rg1
      • 2.Sxc4#
    • 1...Rh1
      • 2.Sxc4#
    • 1...Bf1
      • 2.Re6#
    • 1...Bg2
      • 2.Re6#
    • 1...Be6
      • 2.Rxe6#
    • 1...Sg4
      • 2.Re6#
    • 1...c3
      • 2.Sc4#
    • 1...e6
      • 2.Sc6#
  • Tries
    • 1.Rxb5+?
      • 1...Kd6
        • 2.Rd5#
        • 2.Qxd4#
      • 1...c5!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qf4#
      • 1...Qxf7
        • 2.Sxf7#
      • 1...Sf5
        • 2.Re6#
      • 1...Qh4
        • 2.Bg7#
      • 1...Sc2
        • 2.Sxc4#
      • 1...Sc6
        • 2.Rxb5#
      • 1...Se6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 15
  • Sets
    • Q(m);N_GUARD::B(L)
    • Q(m);XP(I)::S(K),XQ(m)
    • Q(m);N_GUARD::B(L),XQ(m)
    • R(a);N_GUARD::S(B),XP(g)
    • B(f);N_GUARD::R1(G)
    • B(f);N_GUARD::R1(G),XB(f)
    • S(c);S_CUTB(f)::R1(G)
    • P(g);N_SPINS(h),S_CUTR(a)::S(B)
    • P(l);SBLOCK::S(K)
  • Tries
    • Try
      • R(G);CHECK,XR(i)
      • Refutation
        • P(k);P_SPINP(k)
  • Actual
    • Q(A);N_PINS(h)
    • Threat
      • QAB1(A)
    • Vars
      • Q(m);XP(I)::S(K),XQ(m)
      • S(h);N_GUARD,S_CUTB(f)::R1(G)
      • Q(m);N_GUARD::B(L)
      • S(h);S_CUTR(a)::S(B),XP(g)
      • S(h);N_GUARD,S_CUTP(k)::R(G),XR(i)
      • S(h);N_GUARD,SBLOCK::S(K)
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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).