MESON Chess Problem Database

Problem Display
PID: 208072 (3n1Bn1/1p2q1p1/pP2Prb1/2k3N1/3R2RK/PQ4N1/5rB1/4b3 w - - 0 1)

Ellerman, Arnoldo

Il Problema, 1933

3n1Bn1/1p2q1p1/pP2Prb1/2k3N1/3R2RK/PQ4N1/5rB1/4b3

#2

11 + 11

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Bxd6#
      • 2.Rc4#
    • 1...Rd2
      • 2.Qb4#
    • 1...Bb4
      • 2.Qxb4#
    • 1...Sc6
      • 2.Rd5#
    • 1...Sh6
      • 2.Bxe7#
  • Keys
    • 1.Rd6!
      • threat
        • 2.Qd5#
      • 1...Kxd6
        • 2.Qd5#
      • 1...Qxd6
        • 2.Rc4#
      • 1...Qxe6
        • 2.Rc6#
      • 1...Rd2
        • 2.Qb4#
      • 1...R2f5
        • 2.Se4#
      • 1...R6f5
        • 2.Se4#
      • 1...Be4
        • 2.S3xe4#
        • 2.S5xe4#
      • 1...Sc6
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(b);P_PINS(D),S_CUTB(a)::QAB1(C)
    • B(a);N_GUARD::QAB1(C),XB(a)
    • S(j);SBLOCK::R1(E)
    • S(k);N_GUARD::B(K),XQ(h)
  • Actual
    • R(E);N_PINQ(h)
    • Threat
      • QAR1(C)
    • Vars
      • K(c);P_SPINQ(h),S_FLIGHT,XR(E)::QAR1(C)
      • Q(h);P_SPINQ(h),XR(E)::R1(F)
      • Q(h);XP(J)::B(K)+R(E),DCHECK
      • R(b);P_PINS(D),S_CUTB(a)::QAB1(C)
      • R(b);P_PINS(D),S_CUTB(f)::S(H)
      • R(e);P_PINS(H),S_CUTB(f)::S(D)
      • S(j);SBLOCK::R1(E)
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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).