MESON Chess Problem Database

Problem Display
PID: 83569 (r7/p1p2n1P/2pR2N1/R2n2p1/p2kp1P1/q1N4K/b2P4/B4Q2 w - - 0 1)

Ellerman, Arnoldo

Sahovski Glasnik, 1921

r7/p1p2n1P/2pR2N1/R2n2p1/p2kp1P1/q1N4K/b2P4/B4Q2

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Sb5#
    • 1...Qxd6
      • 2.Sxd5#
    • 1...Qxc3+
      • 2.Bxc3#
    • 1...Sd8
      • 2.h8Q#
      • 2.h8B#
  • Keys
    • 1.Se7!
      • threat
        • 2.Sxc6#
      • 1...Qxc3+
        • 2.Bxc3#
      • 1...Ke5
        • 2.Qf6#
      • 1...Qxd6
        • 2.Scxd5#
      • 1...Qc5
        • 2.Sb5#
      • 1...Se5
        • 2.Sf5#
      • 1...Sd8
        • 2.h8Q#
        • 2.h8B#
      • 1...c5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_PINS(D),SBLOCK::B(A)+S(D),DCHECK
    • Q(b);N_PINS(D),N_SPINS(f),XR(H)::B(A)+S(D),XS(f)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XS(D)::B(A),XQ(b)
    • S(k);N_GUARD,S_CUTR(l)::P=Q
  • Actual
    • S(I);
    • Threat
      • S(I),XP(h)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(D)::B(A),XQ(b)
      • K(d);S_FLIGHT::QAB1(B)
      • Q(b);N_PINS(D),N_SPINS(f),XR(H)::B(A)+S(D),XS(f)
      • Q(b);N_PINS(D),SBLOCK::B(A)+S(D),DCHECK
      • S(k);SBLOCK::S(I)
      • S(k);N_GUARD,S_CUTR(l)::P=Q
      • P(h);::S(I)
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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).